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How to Fix Reduced Engine Power GMC Yukon 

TWA Motorsports
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How to Fix Reduced Engine Power GMC Yukon
Parts Used
Throttle Body amzn.to/3MV2goS
Throttle Body Gasket(if needed) amzn.to/3ubQXjy
Tools Used
8mm amzn.to/3N27TS9
10mm amzn.to/36twKhd
Inch lb Torque Wrench amzn.to/37HV8MA
Pliers amzn.to/3u8Ni67
Hood Light amzn.to/3widqy1
Other Parts Used on This Yukon
Wheels ebay.us/6GEVP0
Check out Some of the Project Playlists
Trucks • Trucks
Red WS6 Trans Am • WS6 Trans Am
Green GMC Sierra • 2002 Sierra Project
Patina 54 Chevy • 1954 Chevy 210
1955 Chevy Belair • 1955 Chevy Belair
OBS Silverado • OBS Silverado Build
Flat Black 52 Chevy • Slammed 52
1998 WS6 Convertible • 1998 WS6 Convertible
So as I talked about in the first video on this thing. We had an issue with reduced engine power. This is a common thing on gmc yukon, chevy tahoe, chevy silverado and gmc sierra. I also had this issue on my chevy suburban. While several people read the codes and choose to buy an aftermarket throttle body. That really doesn't always fix the issue. Aftermarket drive by wire throttle bodies especially on gm vehicles always seem to have issues. This causes you to spend more money on parts not needed. While I know others have had issues with grounds on these suvs. It was not the issue here. If you are in a cold environment or it usually happens in the morning, chances are it is the throttle body. The gm throttle body will start to show issues in the cold and will cause the reduced engine power mode or code. This is a simple fix and I also give you the torque specs for a gm dbw throttle body. Hit the Comments and let me know what you think.......
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Disclaimer:This video and description contains affiliate links, which means if you click on a product link, I'll receive a small commission.

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26 авг 2024

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Комментарии : 394   
@jjslowhand
@jjslowhand Год назад
Hey Travis I cannot thank you enough for your vid on the '04 Yukon Denali. EXCELLENT ADVICE SIR! Finally, I am Cruising in same vehicle, my daily/only driver:) As you predicted/mentioned, my problem was SOLVED by R&R THROTTLE BODY W GENUINE GM PART. When I removed the 1 year old TB that local shop replaced, guess who? Of Course it was an aftermarket Remanufactured Hitachi TB from Taiwan, that was purchased from a normally reliable source that begins with a Capital N. AGAIN, YOU WERE CORRECT that some of those are bad right out of the box or fail soon thereafter. Mine failed 4 months after install & I limped, and limped and almost gave up. Spent lots of money. Shop finally told me: "Cannot Fix, Take it to a Dealer In Miami". That's all I needed to hear and decided to TAKE TRAVIS' ADVICE and replace it myself. Detaching & Re-attaching those coolant hoses underneath w/o proper tools was a major hassle but your vid gave me confidence that I could finesse that w needlenose & handle this repair. Bolted on & she started right up, no idling issue. Put a couple hundred miles on it before I posted SUCCESS to you. Thanks again Brother, You are the best!
@TWAMotorsports
@TWAMotorsports Год назад
That is awesome. I love to here that. Just can't trust aftermarket ones honestly
@womanofdestiny84
@womanofdestiny84 4 месяца назад
Was your Tc light on as well?
@TWAMotorsports
@TWAMotorsports 4 месяца назад
Occasionally
@Bham98
@Bham98 2 года назад
sold him this truck been in the family for years but it’s in good hands now 🙏🏼
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you for selling it to me. Way more to come.
@readyeddie2065
@readyeddie2065 7 часов назад
One thing to remember if you’re having this problem is to make sure your ground wire isn’t corroded and the connection is scraped all the way to bare metal. I thought mine was okay on the truck I bought because I saw someone had already ran big ground wires everywhere but when i removed the main one going to the block I noticed it was full of corrosion and the paint wasn’t even scraped off. Seems to have fixed the problem now.
@Beardedgarage90
@Beardedgarage90 2 года назад
I’ve been dealing with the reduce engine problem for about 7 months I’ve replaced the throttle body with a duralast one since a GM one wasn’t available. And man this is the 3rd one I’ve swamped and it only works for a day or two. Always in the morning it would go into reduce mode. And in the afternoon there is no problem at all. Seeing your video now has me thinking i should buy the GM one. The duralast one made a noise like yours did when i picked it up as well. Thanks for the great video. I hope i am able to fix it with the GM throttle body.
@TWAMotorsports
@TWAMotorsports 2 года назад
I bet that will fix your problems
@readyeddie2065
@readyeddie2065 7 часов назад
If that didn’t fix it run a ground wire from the block to the body. Even if there is already a ground be sure to check it isn’t full of corrosion and if it’s on an area that is painted make sure the paint has been scraped to bare metal. That is what fixed it on mine. Hope this helps someone.
@beejay8719
@beejay8719 2 года назад
Awsome!! Tried several years ago to clean mine. Just cleaned up front because I could get it off. Never thought about the hoses. Well at that tines wasn't as mechanically inclined as i am now. Way better throttle response after. Thanks for the video
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you. This one actually feels more responsive
@transam4555
@transam4555 2 года назад
Awesome fix, learned something today. I'm planning on getting one of these for family trips. They go for dirt cheap down here in south Texas. Great video Mr.T.
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you. They are good reliable vehicles generally
@ryans6449
@ryans6449 2 года назад
Where in south texas
@TWAMotorsports
@TWAMotorsports 2 года назад
No idea. I looked there and couldn't find one.
@JR-oz5mf
@JR-oz5mf 2 года назад
I had the same problem on my tahoe. Went to the junk yard and got a used one and it fixed the reduce engine power.
@TWAMotorsports
@TWAMotorsports 2 года назад
Nice. That works too
@albertrivera4689
@albertrivera4689 8 месяцев назад
Great Video!! just bought an GM brand throttle body, almost went the after-brand route.
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Definitely best to go with GM
@kylemoran4699
@kylemoran4699 2 года назад
Looking forward to seeing you putting your touches on this Yukon. Vote for removing the roof rake. I made another ground for my Tahoe too.
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you. Yeah it's going to look different, thats for sure
@allanheinrich7184
@allanheinrich7184 8 месяцев назад
40 mph , I couldn't get 30 mph when my Suburban acted up. I cleaned the throttle body and that took care of the problem.
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Some are worse than others I guess
@joswikjones
@joswikjones 8 месяцев назад
Thank you for the video, hoping this improves my quality of life drastically! Bought an 03 yukon xl with 250k mi 3 yrs ago on the cheap. still has a few annoying issues. Reduced engine power, oil pan leak, always says right rear door open and check brakes, and dings incessantly, alarm goes off randomly😂 I’m not mechanically minded but have been able to fix various stuff.
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Sounds like you may have a bad bcm
@miiiikee_
@miiiikee_ 2 года назад
The only thing Dorman I trust is my valve stem caps lol. Definitely lose the roof rack if you never plan on using it, looks cleaner and less drag on the roof.
@TWAMotorsports
@TWAMotorsports 2 года назад
Lol. Roof rack is going away
@mrbrowz1000101
@mrbrowz1000101 2 года назад
Amen brotha. I had a set of Dorman headlight aiming screws for a G-Body (had a set of retrofitted headlights; highly recommended) and those things folded like two pieces of Sunbeam bread. I said never again!
@TWAMotorsports
@TWAMotorsports 2 года назад
Lol
@keilylmm6377
@keilylmm6377 2 года назад
Good Thursday evening Travis. I'm just getting home from work and getting settled in having dinner with my wife. My wife's birthday is tomorrow so we are going to have family over tomorrow night... My wife and I will be tuning in to your video in a few minutes..
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you Keith. Tell your wife happy birthday. Have a great night
@jasonperez4775
@jasonperez4775 2 года назад
Thanks for being so detailed. I have very limited mechanic knowledge so this is very helpful. The problem just showed up on my 05 yukon last night. I am going to try and give it a shot this week. thanks again
@TWAMotorsports
@TWAMotorsports 2 года назад
You're welcome. Hopefully you can get yours fixed
@masl2004
@masl2004 Год назад
My 03 Silverado 6.0 was showing the "reduced engine power" as well one morning, so I cleared the codes and it runs totally fine now. I think it was just due to the cold the one day
@TWAMotorsports
@TWAMotorsports Год назад
Which means throttle body is on its way out
@cslloyd1
@cslloyd1 2 месяца назад
Mine starting acting up in the June heat, but getting stuck in traffic seems to push it over the edge
@TWAMotorsports
@TWAMotorsports 2 месяца назад
Gonna get worse
@tomasmartinez7349
@tomasmartinez7349 2 года назад
Add a Corvette Servo to the transmission, it will help in shift points and acceleration . My transmission was having the same issue with gear delay every time I try to make a pass . The Corvette Servo is the best way to go . It will increase your transmissions life.
@TWAMotorsports
@TWAMotorsports 2 года назад
I have done that in the past
@cslloyd1
@cslloyd1 Месяц назад
This “reduced engine power” condition is criminal negligence in design. How many people have died on the side of the road due to this problem?
@TWAMotorsports
@TWAMotorsports Месяц назад
Probably several
@curtishorton6163
@curtishorton6163 Месяц назад
​@@TWAMotorsportsYeah several thousand
@TWAMotorsports
@TWAMotorsports Месяц назад
True
@cslloyd1
@cslloyd1 Месяц назад
If not for some exceptional luck, I was quite close to being one of them.
@losmoore3358
@losmoore3358 3 месяца назад
U did good on your fix. Im having same issue on my 2005 chevy suburban . I let off the gas it boggs down like its getting ready to die with a tremble.
@TWAMotorsports
@TWAMotorsports 3 месяца назад
Thank you. Good luck on yours
@user-zl5js3sr5d
@user-zl5js3sr5d 10 дней назад
Mines doing same thing
@TWAMotorsports
@TWAMotorsports 8 дней назад
Probably needs a throttle body
@user-zl5js3sr5d
@user-zl5js3sr5d 8 дней назад
@@TWAMotorsports I'm missing two bolts to go into throttle body to manifold so Imma clean it, I order 2 bolts and hopefully the code leaves I clean it it does good but from being loose to much air getting in.. so Imma try cleaning and putting all 3 bolts but if not Imma just fix it
@TWAMotorsports
@TWAMotorsports 7 дней назад
Could definitely cause issues
@nestorcaamano307
@nestorcaamano307 3 месяца назад
I totally agree with you I bought one for my 04 suburban and it got worst and know I can't get it to run or turn on I don't know what else to do I haven't been able to run again sucks
@TWAMotorsports
@TWAMotorsports 3 месяца назад
Gm one?
@danielhibbard2391
@danielhibbard2391 2 года назад
Great video I agree with some aftermarket parts can’t trust them
@TWAMotorsports
@TWAMotorsports 2 года назад
That's no kidding
@VenomWorks
@VenomWorks 2 года назад
Such a simple fix haha, glad it's running good now man!
@TWAMotorsports
@TWAMotorsports 2 года назад
I know. Nice to have it running good. Took it on a 10 hour drive last weekend
@efrainherrera5683
@efrainherrera5683 Год назад
I hace the same problem and is inmigrantes pain in tha you Know what
@DylanRamos425
@DylanRamos425 5 месяцев назад
My 03 has the same issue! Going to try this out and see if this helps. Thanks for the video!!
@TWAMotorsports
@TWAMotorsports 5 месяцев назад
Should fix your issues
@Numbersactor
@Numbersactor 4 месяца назад
Did it fix it cuz mine will not go away replaced basically everything that is t the wire it’s self
@TWAMotorsports
@TWAMotorsports 4 месяца назад
Gm throttle body?
@Numbersactor
@Numbersactor 4 месяца назад
Most likely not my father got it for me and I put it on I can check if it is gm and if it’s not where can I get a gm trottle body.
@TWAMotorsports
@TWAMotorsports 4 месяца назад
@Numbersactor from a dealer
@leobardorocha9191
@leobardorocha9191 8 месяцев назад
I change the throttle body a month ago now I have the same problem this make me so stressed...not wat to do.......great video
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Did you buy a gm like I talked qbout in this video?
@leobardorocha9191
@leobardorocha9191 8 месяцев назад
@TWAMotorsports I went to the dealer and they tell me dealer won't sell parts for a 2004 yukon because is to old....is that true????and I have to buy one in autozone
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Find a better dealer
@frankm8533
@frankm8533 2 года назад
I'm not even a GM guy but my friends have 04 Tahoe they bought new 5.3 it has 439k miles motor is original but two transmissions still looks great it's a weekend dog hauler these days. Looking forward to the TWA touch on this one
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you. Yeah they are tanks.
@lsxpablo
@lsxpablo 2 года назад
Your videos are actually really helpful and you in depth on everything
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you
@nb6584
@nb6584 10 месяцев назад
Also a fan of OEM parts i ran into so many problems before that i thought was because of something else and ended up being the aftermarket part was the issue the whole time. Now i juat look for the best prices of the OEM parts only.
@TWAMotorsports
@TWAMotorsports 10 месяцев назад
Definitely the way to go
@duaneadams1358
@duaneadams1358 10 месяцев назад
I believe I have this issue on my 03 yukon. It was coldish this morning...dead battery, jump started it, and reduced engine power message was on along with disabled system stability. Had no power at all going up my driveway.... Shut it off a couple times..second restart it worked fine...messages gone.
@TWAMotorsports
@TWAMotorsports 10 месяцев назад
Probably on the way out
@jewllake
@jewllake 2 года назад
the rattle in the throttle body is normal when you rock it from side to side. I bought a new GM TB ported by kaytech for my 2018 6.2 and it made that sound. I was a little concerned, but then I pulled out the original one from my truck and it did the same exact thing.
@TWAMotorsports
@TWAMotorsports 2 года назад
Maybe thats why the other didn't work. It didn't make that noise. Lol
@JamesRazorbacks
@JamesRazorbacks Месяц назад
I’m looking at 4 used ones now and none of them make the rattle
@TWAMotorsports
@TWAMotorsports Месяц назад
@JamesRazorbacks who knows
@glenhalstead2301
@glenhalstead2301 Год назад
Man, that thing looks almost new from the outside shots after you replaced the throttle body. Nice buy!
@TWAMotorsports
@TWAMotorsports Год назад
Thank you
@juanbarajasp9283
@juanbarajasp9283 2 года назад
My girlfriend has the same problem 05 escalade with reduced engine, I'm swap from my 04 escalade drive it, hope that fix it. GOOD VIDEO
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you. Hopefully it will fix your issue too
@nathansmith1654
@nathansmith1654 8 месяцев назад
When mine does this I can pull over, shut off the engine for 10 seconds and start it back up. It will though do it again on and off on me within 5 to 10 miles. Thank you for your video!
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Probably need a new one
@bigcountry7096
@bigcountry7096 2 месяца назад
That is the pigtail that goes to the throttle body I had the same symptoms changed the pigtail and it didn't reduce engine power for months but then it came back some how
@TWAMotorsports
@TWAMotorsports 2 месяца назад
Junk throttle bodies
@cslloyd1
@cslloyd1 2 месяца назад
Sounds a lot like mine, but my scenario was very hot day in traffic on I-10. It seems it will work (ok) as long as i can run on cruise control. But getting into traffic was the death nell
@TWAMotorsports
@TWAMotorsports 2 месяца назад
Thank you
@BeardsandCars
@BeardsandCars 2 года назад
I always put ac delco parts on my all mine..learned this along time ago...they just don't seem to like other parts.
@TWAMotorsports
@TWAMotorsports 2 года назад
Not sure how other companies can get away with the crap the sell
@BeardsandCars
@BeardsandCars 2 года назад
@@TWAMotorsports me either
@moejr14
@moejr14 2 года назад
@@BeardsandCars do you have a link?
@BeardsandCars
@BeardsandCars 2 года назад
@@moejr14 link for ?
@moejr14
@moejr14 2 года назад
@@BeardsandCars my bad I thought I was asking Travis. Link for the TB
@jeffgraham48
@jeffgraham48 2 года назад
Ready to see it transform! I had a red 05 years ago i miss. Low with some wheels and your cleaning on it.
@jeffgraham48
@jeffgraham48 2 года назад
Yes shave roof rack.
@TWAMotorsports
@TWAMotorsports 2 года назад
Its coming
@TWAMotorsports
@TWAMotorsports 2 года назад
Definitely
@watuzi
@watuzi 2 года назад
I got an '05 that just reached 200K. Great cars that are easy to work on. Can't wait to see what projects you got in store.
@TWAMotorsports
@TWAMotorsports 2 года назад
I agree. Pretty reliable vehicles
@nickp66104
@nickp66104 2 года назад
@@TWAMotorsports you happen to be in midwest?
@TWAMotorsports
@TWAMotorsports 2 года назад
I'm in Missouri
@tmac90
@tmac90 Год назад
Great video dude. Simple job now I need to do is get the part.
@TWAMotorsports
@TWAMotorsports Год назад
Thank you
@user-jz9ln6ut6b
@user-jz9ln6ut6b 11 месяцев назад
Of course it's gonna work you reset it with the battery disconnect. My question is what happened a couple days later? Did the issue come back???
@TWAMotorsports
@TWAMotorsports 11 месяцев назад
Not after replacing throttle body
@burro5808
@burro5808 2 года назад
hope you do a double din next this yukon is super clean
@TWAMotorsports
@TWAMotorsports 2 года назад
Has a factory double din
@neilyakuza6595
@neilyakuza6595 Год назад
Mine has the same issue. This is a promising video.
@TWAMotorsports
@TWAMotorsports Год назад
Good luck
@robadams2274
@robadams2274 2 года назад
I have this same problem with my Yukon. Got a new TB and harness installed at dealer and 3 months later the same problem started back up. Pretty much gonna get rid of the truck now. It's become a problem no one can fix.
@TWAMotorsports
@TWAMotorsports 2 года назад
Could be a grounding issue
@robadams2274
@robadams2274 2 года назад
@@TWAMotorsports probably, but how many ground wires are in the truck? I've already spent a fortune trying to get it fixed all for nothing. IMO, if someone encounters this issue, they should get rid of the truck immediately and save themselves from a world of headaches.
@TWAMotorsports
@TWAMotorsports 2 года назад
Several do get rid of them. Maybe 10 grounding places in all
@robadams2274
@robadams2274 2 года назад
@@TWAMotorsports I've been reading online about it for months and haven't been able to get mine fixed at the shop. Is there a list of grounds I can fix? I will try it. I hate to see a nice truck get dumped over something this silly.
@TWAMotorsports
@TWAMotorsports 2 года назад
I showed a few of the ones I cleaned. Does it have a new gm throttle body?
@jjslowhand
@jjslowhand 2 года назад
It's always hot down here in the Keys so no cold issue. The shop did add additional ground and I am embarrassed to admit how much money I threw at it w several/many different sensors replaced just trying to keep it going through my fishing season. Just can't pull off the road every 5 miles. Now I have time to work on it myself. Btw I have owned 6 older Burbans (pre '99) over 40 yrs and was able to fix the routine issues. Never had a GMC Yukon Denali w all this fancy stuff.
@TWAMotorsports
@TWAMotorsports 2 года назад
That would be a pain. Hopefully you can get it lined out.
@jjslowhand
@jjslowhand 2 года назад
@@TWAMotorsports Thanks Man. I don't post often but if & when I figure this out i will definitely advise You and hopefully help some of your followers. I am having a hard time finding a TRUE GMC TB for 6.0 '04 Denali Ac Delco ok if i can find one? Thanks for your time and i won't bug you anymore until i fix the damn thing.
@TWAMotorsports
@TWAMotorsports 2 года назад
Only brand I buy is genuine gm
@jasoncollado9043
@jasoncollado9043 Год назад
I'm looking OM TB for my 2001 Chevy Silverado 2500hd Chevy dealer says discontinued any ideas?
@TWAMotorsports
@TWAMotorsports Год назад
That is a cable throttle body. Different deal than what I address here
@DrAlexanderHamilton
@DrAlexanderHamilton 2 месяца назад
LOVE THIS VIDEO, but one question. why don't you have your lift bolted to the floor? Scary stuff or not?
@TWAMotorsports
@TWAMotorsports 2 месяца назад
4 post don't need to be
@DrAlexanderHamilton
@DrAlexanderHamilton 2 месяца назад
@@TWAMotorsports wow I didn't know that . How stable is that?
@TWAMotorsports
@TWAMotorsports 2 месяца назад
Very stable
@markb3129
@markb3129 2 года назад
My 2003 was getting hard to start and was intake gasket causing it🤔. Roof rack needs to go. Hopefully you will install electric fans, thinking about installing them in my 2000 chevy truck.. ✌
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you. Yeah this probably needs those too. Lol. Electric fans will come eventually. I did that swap on my green nbs truck
@nestorcaamano307
@nestorcaamano307 8 месяцев назад
Hi travis i have the issue but i already change the throttle body and the black box that runs the throttle and the gas pedal and i left the negative wire unplug over night still the same issue no throttle responds and i turn it off turn it on again runs fine for minutes or less i dont know what else to do i can really use your skill thank you very much
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Make sure and check all the grounds
@jonshackelford1156
@jonshackelford1156 2 года назад
Definitely, delete the roof rack so much cleaner look. I’d love to see how to do that to mine. Love the channel, your up there next to that Giraffe guy from Florida, as my favorite channels to watch. Side question if you don’t mind. How do you get the caps, over the bolts/ nuts of the windshield wipers off with out damaging them?
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you. Will have a Windshield wiper removal video soon
@briizcustoms9543
@briizcustoms9543 8 месяцев назад
What things do you do to increase gas mileage? Clean sensors, gas type etc? I use E87, that’s it. No mods etc.
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Generally that isn't a concern of mine
@davemarriott9332
@davemarriott9332 Год назад
Excellent excellent video. We’ll explained and executed
@TWAMotorsports
@TWAMotorsports Год назад
Thank you
@fezcarstuff5851
@fezcarstuff5851 11 месяцев назад
For my situation it isn’t the throttle body, I bought a new throttle body, coil packs, spark plugs, wires, but yet it still gives me this issue. It’ll even cut mid drive and buck and eventually die and not start again.
@TWAMotorsports
@TWAMotorsports 11 месяцев назад
Its a ground or throttle body. If you bought a non gm throttle body I would start there after ground connections
@JunoSixTwenty
@JunoSixTwenty 8 месяцев назад
P1516 will pop up and go into reduced power mode randomly after i am already driving for a while. Ill pull over and turn my truck off and turn it back on and it goes away and i can drive normally again. The regular driving does seem kinda sluggish though.
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Might need a throttle body
@srtclonbs944
@srtclonbs944 2 года назад
Those coolant hose under the throttle specifically the left one where does it go to?
@TWAMotorsports
@TWAMotorsports 2 года назад
One to under intake. One to radiator
@thegoodlife9190
@thegoodlife9190 Год назад
Hey Travis, Thanks so much for the video. Got a question about my 2007 Sierra 1500 truck. When you said “reduced power” did that also mean it was missing like firing on fewer cylinders? The GMC dealer suggested to rebuild the top half of the motor. The mechanic is telling me it’s stuck in 4 cylinder mode. It has that 8 cylinder, 4 cylinder gas saving feature. My truck stopped running setting at a red light, it wasn’t moving but when I finally got it cranked it felt like it was firing on 2 cylinders. I’ve had small electronic issues in the past but nothing like this and I don’t know if switching from 8 cyl to 4 cyl is done electronically. Have you ever experienced a GMC stuck in 4 cylinder mode? When I get the truck back I’m going to look at my ground wires. Thanks again for the video.
@TWAMotorsports
@TWAMotorsports Год назад
No that is a different issue entirely
@tanoktenahua1665
@tanoktenahua1665 8 месяцев назад
Cool video. My 03 Yukon does it once in a while but doesn't do it when it's cold. It does it after it's warmed up. I can start it fine and drive for a couple miles and once a start it again it gives me that reduce engine power. I just disconnect the harness and plug it back in and it goes away. You think it's the throttle body?
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
Probably so
@joe-tf2vx
@joe-tf2vx 2 года назад
All I did was run a ground from the ECU to the negative battery terminal and fixed the problem
@TWAMotorsports
@TWAMotorsports 2 года назад
Mine was definitely the throttle body
@williamwatson8796
@williamwatson8796 2 года назад
Many People say Ground the ECU - Body " but My 2000 Yukon XL has A Black Plastic ECU Body ( box unit - that Snaps in place to the Driver's s Side Firewall. So I take it That I Should Distinguish Which of the Connector Wires is The Negative, and Ground That one to the Neg. Battery Post...?? ). Also - I experienced the " Reduced Engine Power " Syndrome, while 2- blocks from My Home, Just Trying to Go to Work, at 5:30 am. The Vehicle Showed Numerous Codes, and Many Dash Lights, would Only Drive 7 M. P. H. - back to the House... To Switch out Cars.... It put Me into a Panic, I thought the Yukon was Ruined... Or would Cost $800 to $1200 to get it Fixed... As I was Having codes ( 0452 EVAP Pressure , Low Voltage , " which I bought a New Fuel Press. Tank Sensor... But Never Installed it Yet, then came the 0332 Bank 2 knock Sensor Error Code. Well... I Was Late for Work and Very Frustrated.... So I thought Carefully , to Disconnect the Battery Post Cables, and Let them Sit until 5:30 Pm , when I got Home... I touched the Red/ Black Cables together to Remove any residual Computer Power... Then I used a Steel 5/8 " hand Brush, and removed the Battery Bolts from the Rubber Cables, And Scrubbed the Hell out of Every Possible Battery Surface, then Cleaned the Bolts, there was an Unseen Dry Yellow Sulfur Powder Present, Blew it all Away, Reconnected Cables , Snug... Crossed My Fingers, and Started the 5.3L Yukon... Only , the Idle Needed to Re- Learn.... I took it for a Calm Test Drive, to Re- Learn , My Driving Style... Everything was Perfect, it Ran Normal Again...!! Although, the Codes 0452, and 0332 still pop up... Until I address those Semi - Difficult Issues To Swap out Fuel Tank Pressure Sensor, and to Remove the Entire Intake Manifold Plate, and Buy - Quality Knock Sensors. And Install PROPERLY, WITH MINOR OIL DRAINING / POOLING MODS... THAT I SAW ON A RU-vid VIDEO I DO HOPE This has Helped Somebody.... Before - You Start Throwing New Parts at the 5.3L engine, or Taking it to DisHonest , Scammer Mechanics... That Don't Tell You, what it Took to Remedy the Errors... BillinL.A. 7-29-22
@BigBvby1016
@BigBvby1016 2 года назад
are you going to make a Yukon build series that would be awesome . you could swap the roof racks for escalades' . I've got escalade trim on my Yukon. roof racks , running boards , rear bumper, rear window with third brake light and rear pillar vents . and it makes it look like an upgraded trim package .
@TWAMotorsports
@TWAMotorsports 2 года назад
I am. Not planning on adding any escalade parts.
@angelasmith9050
@angelasmith9050 Месяц назад
I have a 2000 Yukon. Replaced throttle position, O2 sensor and fuel pump. Also new in line fuel filter, and plugs but not new wires. Running alot better but still doing it. Not showing any codes. Any ideas!!!
@TWAMotorsports
@TWAMotorsports Месяц назад
Throttle body?
@angelasmith9050
@angelasmith9050 Месяц назад
@TWAMotorsports that's next on the list. With it not throwing any codes its really confused us.
@TWAMotorsports
@TWAMotorsports Месяц назад
It happens
@hunterbydesign
@hunterbydesign Год назад
I have the same limp mode issue with my 2003 gmc Denali 6.0. It will at times do it when I hit a bump, other times for no particular reason. I can pull off the road sit for 20 seconds, fire it up and take back off. Sometimes I’m good the rest of the drive, other times it’ll do it 5 times in the next 5 minutes. Had throttle body replaced, pedal sensors, knock sensors. Sounds like I need to confirm it was a gm tb and check my grounds. Does this sound like the place to start? I also have weird intermittent cabin lighting issues where they are often dim and then will randomly be really bright as they should be. Think it’s related and any ideas? Thanks for the great vid and comments on here!
@TWAMotorsports
@TWAMotorsports Год назад
Sounds more like a ground issue
@nathanjones1318
@nathanjones1318 2 года назад
That was a good buy it looks great but I know ur gonna make it look better plus drop it
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you. I am definitely going to be making some changes
@toodjackson4438
@toodjackson4438 6 месяцев назад
I got the same problem but mine might do it twice a week or it might go three weeks before it doesn't it
@TWAMotorsports
@TWAMotorsports 6 месяцев назад
It will eventually be all the time
@tanoktenahua1665
@tanoktenahua1665 6 месяцев назад
My 03 Yukon does it when it's warm up. I'll come back from work and if I start it again to go anywhere else it gives me that message. I have to turn it off disconnect the throttle body harness and plug it back in then it goes back to normal. I'm kinda leaning toward the throttle body as well. What do you think it is?
@TWAMotorsports
@TWAMotorsports 6 месяцев назад
Could be the issue. Generally is
@jjslowhand
@jjslowhand 2 года назад
Excellent vid Sir. I also have an '04 Yukon Denali XL that I bought 5 years ago w 170K/223k now. Same color but yours looks much nicer. It is also my daily driver and I use it to tow a sm skiff for my charter biz. Always ran perfectly. Love it! Many months ago the T/C light would come on periodically and it would go into Reduced Power mode. Pull off the road, wait a few seconds and restart and all is fine for approx 5 miles. Took it to my local shop here (I had to get it running ASAP & did not have time to R&R the TB myself) in the Keys and they replaced Throttle Body and both front wheel sensors. Ran fine for 4 MONTHS, now I have the same problem constantly. Undrivable now. They used an aftermarket TB. I would sincerely appreciate any advice. R&R TB w genuine GMC part? Thanks again for the explicit vid. Please advise Sir. Thank you very much.
@TWAMotorsports
@TWAMotorsports 2 года назад
Probably the grounds or throttle body. I would start with the throttle body
@jjslowhand
@jjslowhand 2 года назад
@@TWAMotorsports Copy that loud and clear. Thanks for quick reply.
@TWAMotorsports
@TWAMotorsports 2 года назад
You're welcome
@chieftejay
@chieftejay 10 месяцев назад
My truck has same prob what type of wire you used for ground wire ? Any specific or type of wires you need or how thick they need be ?? Lmk Plz
@TWAMotorsports
@TWAMotorsports 10 месяцев назад
10 gauge I believe
@christianderby806
@christianderby806 10 месяцев назад
I’m having problems when I try and get on it there no power it stops me but drives just fine when I don’t accelerate fast I replaced spark plugs wires maf sensor and pedal accelerator sensor I’m wondering if it’s my throttle body also I dont have a check engine
@TWAMotorsports
@TWAMotorsports 10 месяцев назад
Could be but not sure
@sikes185
@sikes185 4 месяца назад
I have a question. Did you get a code when it was running bad on cold crank up? My 04 Yukon will run like crap on a real cold morning on a crank up. Seconds later it runs fine. Black smoke out the tail pipe. Code shows 071 and 074. May be 171 and 174. Any who. Those are left and right bank lean. Going to change my 02 sensors and see what happens. Original throttle body on her. Oh and I took my roof rack off and love that look
@TWAMotorsports
@TWAMotorsports 4 месяца назад
Yeah that sounds like a different issue
@sandymilne224
@sandymilne224 2 месяца назад
I hear that there are 4 O2 sensors on my 1999. Which ones should I replace? Left and right banks ‘lean’ is the code
@sikes185
@sikes185 2 месяца назад
@@sandymilne224to be honest I have the sensors for the front. I just have not replaced them yet. I don’t know if this is the problem. But I think it is a good place the start.
@sandymilne224
@sandymilne224 2 месяца назад
@@sikes185 : Thanks for the comment. They are not cheap to buy quality ones. Without testing the OHMs of everyone of them, I was wondering if the fail rate of specific ones is more common. I’d start by replacing those first and go one-by-one through the system. Just wondering if anybody knew which ones ‘go’ more often than the others.
@sikes185
@sikes185 2 месяца назад
@@sandymilne224well my thoughts on this is. The code reads left and right bank lean. If it was just reading left bank lean then I’d go with one. But sense it says left and right. What the hec I will replace both. I mean it’s only money. You can’t take it with you. Lol
@nbsaddiction1522
@nbsaddiction1522 2 года назад
So the p1516 code pertains to the TB I cleaned my grounds as well drove it this morning it being cold did the same thing again I did a plug and wire change 2 weeks ago after this past weekend it started the reduce power and check engine light stays on I noticed in the cab the rpm needle is sitting below the 1on a cold start a bit wasn't like that before the problem arose
@TWAMotorsports
@TWAMotorsports 2 года назад
I would look at the throttle body especially if it is only on cold mornings
@omarzowila
@omarzowila 2 года назад
What happened to the brown Yukon?
@TWAMotorsports
@TWAMotorsports 2 года назад
Green one is my wifes daily
@freddiehudson2936
@freddiehudson2936 2 года назад
Your vids are great. Keep doin.
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you
@marciaricker6317
@marciaricker6317 Год назад
i noticed you moved the oil fill neck back in place when moving the harness out of the way. Is that normal for the neck to move like that?
@TWAMotorsports
@TWAMotorsports Год назад
Some older ones do
@duvalle2004
@duvalle2004 11 месяцев назад
I changed out my TB and the pedeal censor , and on a cold start it still shows reduced power and check engine light. Any advice???
@TWAMotorsports
@TWAMotorsports 11 месяцев назад
Gm throttle body? Check all the grounds?
@The210satx
@The210satx 2 года назад
You should install a set of Escalade rear pillars
@TWAMotorsports
@TWAMotorsports 2 года назад
Don't love painted ones
@kevint.4249
@kevint.4249 8 месяцев назад
What gauge cable do you use for extra ground cables??
@TWAMotorsports
@TWAMotorsports 8 месяцев назад
10
@GrabYourCoffee
@GrabYourCoffee 7 месяцев назад
Mine was the tps in 08 Tahoe. And went ahead and cleaned the throttle body as well.
@TWAMotorsports
@TWAMotorsports 7 месяцев назад
Yeah they get carboned up
@XxTh3N1ghtmarexX
@XxTh3N1ghtmarexX 2 года назад
Did you have p0220 and p2135?? My truck is stuck in reduced engine power and I can’t find the problem.
@TWAMotorsports
@TWAMotorsports 2 года назад
I did
@TaNiyaTaylor
@TaNiyaTaylor 6 месяцев назад
My 2008 suburban goes into engine power reduced when I hit a bump. Does anyone know the problem?😢
@TWAMotorsports
@TWAMotorsports 6 месяцев назад
Abs line would be my guess
@user-dq7iy5nv5d
@user-dq7iy5nv5d Год назад
How can I replace my sunroof motor, 2002 Cadillac escalade ext, 6.0 liter
@TWAMotorsports
@TWAMotorsports Год назад
I'm sure but have never done it.
@bigcountry7096
@bigcountry7096 2 месяца назад
You can destroy the tb if you dont disconnect the battery before installation
@TWAMotorsports
@TWAMotorsports 2 месяца назад
Ok
@freddiehudson2936
@freddiehudson2936 2 года назад
Keep the roof rack. I have an 04 yukon slt. I just recently upgraded my tail lights. After I installed the tail lights and put in LED bulbs my cruise control stopped working. My switch is brand new and my fuse is good. I've researched that the new tail lights could be the problem. Lemme know what you think.
@TWAMotorsports
@TWAMotorsports 2 года назад
I did upgrade lights and no cruise control issues
@enriquelopez6033
@enriquelopez6033 Год назад
Had the same issue it was my LED bulbs that didnt have the right resistors and went back to stock bulbs and wala cruise control works again
@TWAMotorsports
@TWAMotorsports Год назад
Yeah apparently that is common
@firebirdloft
@firebirdloft 10 месяцев назад
Hello sir, my chevy express doing the same when i hit a bump..I changed throttle body position sensor, worked for a couple hours then i took a bumpy road and problem came back..any idea?! Thanks!
@TWAMotorsports
@TWAMotorsports 10 месяцев назад
Sounds like a ground broken or frayed
@firebirdloft
@firebirdloft 10 месяцев назад
@@TWAMotorsports thanks, I’ll check that and I’ll check throttle plate. Thanks again
@TWAMotorsports
@TWAMotorsports 10 месяцев назад
@firebirdloft back of heads too
@37sanchez
@37sanchez 2 года назад
Thanks may frend
@TWAMotorsports
@TWAMotorsports 2 года назад
You're welcome
@capitalr8649
@capitalr8649 2 года назад
Did you have any codes before changing out the throttle body?
@TWAMotorsports
@TWAMotorsports 2 года назад
Yes I did. All related to tb
@Joshsotojustss
@Joshsotojustss Год назад
Im having the same issue but also another issue where it will have a very slow crank in the morning but it will start and it will say reduced engine power ill let my truck warm up turn the truck off start it couple times and it the limp mode goes away but do its the tb or could be something else ?
@TWAMotorsports
@TWAMotorsports Год назад
Yes. Tb isn't responding
@Joshsotojustss
@Joshsotojustss Год назад
@@TWAMotorsports Okay ill swap it soon for a GM tb and ill lyk thanks man
@xBruceLee88x
@xBruceLee88x Год назад
Been dealing with this with our 2003 yukon xl 1500 denali. Has the 6.0. Weird thing is when it happens, you can pull over and turn off the engine, then after a minute or so start up and keep driving normal
@TWAMotorsports
@TWAMotorsports Год назад
Yep throttle body or ground
@xBruceLee88x
@xBruceLee88x Год назад
@@TWAMotorsports yea definitely a repair I feel comfortable tackling... Not looking forward to the head gasket on my other car... 03 century with the 3.1
@TWAMotorsports
@TWAMotorsports Год назад
Yes the 3.1 sucks.
@xBruceLee88x
@xBruceLee88x Год назад
@@TWAMotorsports can definitely confirm lol. Replaced thermostat (that was missing for reasons... Previous owner), then waterpump was leaking. Then replaced that and then was told it was the intake Manifold gasket... Just paid for that to be done... And now it's the head gasket. Honestly not sure if worth it at this point... 238k miles.
@TWAMotorsports
@TWAMotorsports Год назад
Been there with vehicles before
@manuel_r1426
@manuel_r1426 2 года назад
Good video 😎🔥
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you
@jgrc4588
@jgrc4588 Год назад
Was your reduced engine code somehow associated with rain, water? I replaced the throttle body and related sensors and the problem went away. For a little while anyways, but it came back shortly after, one thing I noticed. The reduced engine power code always showed up after a car wash or every time it rained. It is my understanding that there's a service bulletin from GM related to this fault.
@TWAMotorsports
@TWAMotorsports Год назад
It can be. These throttle bodies are temperamental
@jgrc4588
@jgrc4588 Год назад
@@TWAMotorsports Thank you for your feedback.
@TWAMotorsports
@TWAMotorsports Год назад
You're welcome
@erwins.7007
@erwins.7007 2 года назад
Will this throttle body fit 05 chevy tahoe ?
@TWAMotorsports
@TWAMotorsports 2 года назад
Yes
@tylerculwell9292
@tylerculwell9292 Год назад
Can anyone help me understand why my driver window will roll up when I cross the wires but won’t work with my brand new button that I can hear click with power and all the others work fine And I crossed the wires at the pins on the connectors
@TWAMotorsports
@TWAMotorsports Год назад
Nope
@kb9liq
@kb9liq Год назад
mine only does it when it is really hot out. Is it still a throttle body? Winter time I normally do not have this problem
@TWAMotorsports
@TWAMotorsports Год назад
Could be or a coolant temp sensor in the driver side head
@kb9liq
@kb9liq Год назад
@@TWAMotorsports Well now the pedal does nothing so I'm wondering if it in the pedal sensor
@TWAMotorsports
@TWAMotorsports Год назад
Could be
@spinningwheelsmedia
@spinningwheelsmedia Год назад
I’m having a similar issue on my 03 avalanche it has the p1518 throttle body code, it runs like a dream until I turn the air on, then it goes into reduced power mode. With the air off it is fine, there is a new aftermarket tb on it should I change it to a gm tb? Why do you think it gets triggered by the ac/blower motor
@TWAMotorsports
@TWAMotorsports Год назад
Could just be a broken ground
@spinningwheelsmedia
@spinningwheelsmedia Год назад
@@TWAMotorsports I went through and made several new grounds already, and fixed a shotty splice job on the blower motor with no luck. I was reading review on the tb which is a hitachi, and many of them are saying it's garbage and only works for about 5 months. I don't know how long it has been in there I just bought the truck a couple days ago
@TWAMotorsports
@TWAMotorsports Год назад
I doubt its rhe tb if it only happens when ac is on
@spinningwheelsmedia
@spinningwheelsmedia Год назад
@@TWAMotorsports I brought it to a mechanic friend of mine that specializes in electrical we narrowed it down the the ac compressor, replaced it and it's still happening. Looking at the wiring diagram the compressor runs into the computer that controls the TCM were going to isolate it and see if it works he's thinking it either needs a computer or it could be more of a mechanical issue, I'm leaning towards computer, when the code is off it runs great
@TWAMotorsports
@TWAMotorsports Год назад
Crazy
@angelpppppp7017
@angelpppppp7017 Год назад
Throttle body sensor was change on my 07 Yukon buy still no power
@TWAMotorsports
@TWAMotorsports Год назад
Probably needs a completely new throttle body from GM
@lrsorganizing
@lrsorganizing 2 года назад
Hey Travis. Can you tell me how to fix an engine that leaks lots of oil?
@mtsanchez27
@mtsanchez27 2 года назад
Replace seal bro
@TWAMotorsports
@TWAMotorsports 2 года назад
Fix the gasket its leaking from.
@TWAMotorsports
@TWAMotorsports 2 года назад
👍
@JoseVega-hw8qb
@JoseVega-hw8qb Год назад
Hey so I got 2000 yukon denali, i got a problem where i drive it from work to the house about 5 minute drive i go to start it after like 30 minutes of sitting and its an Intermittent long crank and it used to not start till the next day i had the security system fixed and i still have the long hesitating cranks and now that it cold out i have it outside and it loss of power till it gets warmer then runs fine. Had it in 3 different shop no one can tell me what it could be. Any ideas? Thanks in advance
@TWAMotorsports
@TWAMotorsports Год назад
Sounds like a fuel pump on its way out to me
@JoseVega-hw8qb
@JoseVega-hw8qb Год назад
I put one on my self did the same thing no change and i had a shop change it out as well and nothing has changed
@TWAMotorsports
@TWAMotorsports Год назад
Sounds fuel related to me
@Texasmade4444444444
@Texasmade4444444444 Год назад
Mine has been doing the same thing for years hardly drive it now i know what to do 😩
@TWAMotorsports
@TWAMotorsports Год назад
Change the throttle body
@Texasmade4444444444
@Texasmade4444444444 Год назад
@@TWAMotorsports ok i will i almost gave up on it even when its really cold and the truck is warmed up and i drive it itll do it again while im driving
@cindygreen852
@cindygreen852 Год назад
2003 CHEVY AVALANCHE SAME PROBLEM ..after changing the TB the reduce engine power still there plus it start to misfire 2 last cylinders on the passenger side to front not firing
@TWAMotorsports
@TWAMotorsports Год назад
Definitely a ground issue
@cindygreen852
@cindygreen852 Год назад
@@TWAMotorsports which ground ? where do i find it ,,i thought the injectors are the coils was the problem
@TWAMotorsports
@TWAMotorsports Год назад
Back of both heads
@cindygreen852
@cindygreen852 Год назад
@@TWAMotorsports dont understand
@TWAMotorsports
@TWAMotorsports Год назад
There is a ground wire that commonly breaks on the back of each cylinder head
@cheetosd6396
@cheetosd6396 Год назад
Mine started doing it when i want to floor it still cant figure it out
@TWAMotorsports
@TWAMotorsports Год назад
Bad ground I bet
@igoo8787
@igoo8787 Год назад
What is the size of the rims
@TWAMotorsports
@TWAMotorsports Год назад
18s
@josephscisson5253
@josephscisson5253 2 года назад
Dope!
@TWAMotorsports
@TWAMotorsports 2 года назад
Thank you
@moejr14
@moejr14 2 года назад
Is it still working? Is your amazon link for the TB a legit one?
@TWAMotorsports
@TWAMotorsports 2 года назад
It is. Iy should be gm one
@MrsQUEENMAKER
@MrsQUEENMAKER 10 месяцев назад
You didn’t have to do all that stuff it’s an easy fix and it’s just pushing the module back up good after you may hit a bump
@darthraider4083
@darthraider4083 Год назад
My dumbazz cleaned the throttle body without unplugging the battery now I have an idle surge and reduced engine power code so I bought a new throttle body/tps, I unplugged the battery for and hr and removed all the ecm fuses. It did nothing I still have a damn reduced engine code why do you think it wont clear the code? Quite frustrated I also disconnected - + and used my jumper cables to drain the system and still wont get rid of that damn code, any help would be appreciated.. I didnt touch anything else accept cleaning the throttle body thanks
@TWAMotorsports
@TWAMotorsports Год назад
Sounds like a ground issue to me.
@darthraider4083
@darthraider4083 Год назад
@@TWAMotorsports Hard Codes: P025A U0073 Codes after I start the engine P1516 P2101 Truck was running just fine until I cleaned the throttle body wit 0 NO Codes.. Also why does my truck start up when I remove both fuse and relay to the fuel pump?
@darthraider4083
@darthraider4083 Год назад
​@@TWAMotorsports Hard Codes U0073 & P025A, Truck was running fine until I cleaned the throttle body, my dumb ass cleaned and unplugged it without disconnecting the battery first no issues before the cleaning
@TWAMotorsports
@TWAMotorsports Год назад
Definitely a bad ground somewhere
@darthraider4083
@darthraider4083 Год назад
@@TWAMotorsports Right on ill check around appreciate it
@cesareduardorodriguez2539
@cesareduardorodriguez2539 Год назад
What about in 09 yukon denali
@TWAMotorsports
@TWAMotorsports Год назад
Pretty much the same
@danorourke5184
@danorourke5184 2 года назад
How much you going to lower this one?
@TWAMotorsports
@TWAMotorsports 2 года назад
Probably 3/4 ish
@jasonschell9860
@jasonschell9860 Месяц назад
💯.
@TWAMotorsports
@TWAMotorsports Месяц назад
👍
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