Reduced Engine Power FIX! Chevy Silverado GMC Sierra Tahoe Yukon 

You sir are a God send! I’ve spent years and more money than I’d like to admit trying to figure out this problem. It was the exact same ground wire on my Tahoe that needed fixing. My Tahoe runs better than it has in years and now I’m not scared to hit a bump lol. Many many thank yous to you sir!

Thank you so much for this video. Was out with my little girls and this happened(Exactly), barely made it home. I was going to buy a new throttle body($250). Then I sat down one more time and searched up my issue. My prayers were answered when I saw this video, honestly almost skipped through it, but my daughter said" Wait and just watch it before you mess up the car more lol. From the mouth of babes. So I truly want to thank you for saving me lots of time and money I don't have to spend on chasing car problems. I would have changed throttle body and still would have had same issue. Very much appreciated! 10 thumbs up from all of us.

I have a 2011 silverado that was doing the same thing.Took it to the dealership and they replaced the ECU, The Throttle body and the gas pedal still no fix.Then they replaced the wires from the throttle body to the ECM.It worked for a week but went back to doing the same thing.Took it to another mechanic (lost faith in the dealership) he worked on it and it worked for another 2 weeks then did the same thing except then you would have to hold the key in the start position for about 3 seconds before it would crank. Watched YOUR video and sure enough it was the problem.Thank you for this video and if you are ever in the New Orleans area I owe you a few drinks and a good dinner!

You area genius!!! I have spent 8 months and over a thousand dollars and nothing fixed it. I tugged on this wire and bam off it pulled. Regrounded like you and FIXED!!!! You just saved me $50k for buying a new car! THANK YOU!!!!!

Lots of people paid lots of money to have the problem fixed only to find that it really wasn't fixed. Kudos to you for posting the video. I'm wondering if the same (or similar) DTC's were present in these cases and if so, was a wiring chart reviewed to see what the common ground point was. Sometimes, a little research can yield great 'knowledge' and success in a correct diagnosis and repair.

Within the first few sentences, I knew you had the same problem. Thank you for posting this video. I'm going out, right now to try this fix!

Man Thank YOU!!!! Sweet 8lb 6oz baby Jesus i was about to take a wrecking ball to this Suburban. Over a year and 4 mechanics later...yet you solved my problem. God bless you brother 👍

Thank you for sharing this video. This was doing the same exact thing mine was doing. Other videos wouldn’t show what the truck was doing , just said reduced power fix , I figured this one was no different , but when I watched and it showed that it was doing exactly what mine was doing , I knew this would fix my problem. Thank you so much for sharing this video. It saved me a lot of money. My truck had been sitting over a month , could not figure it out , I put fuel pump fuel filter crankshaft sensor camshaft sensor and was gonna change the box under the left hinge , that was when I seen this video , after watching over 40 videos I found this one. You saved me a lot more money or saved me from scrapping a good truck. 👍👍👍✌️✌️✌️

Omg you are Genius my truck been down 6 months and 3 mechanics couldn’t find the problem I pay about 2,000 to diagnose and nothing and then saw your video and boom a cable it’s all it need it thank you thank you

Thank you so much! This just happened to me at Walmart! I moved the ground and all the dash lights went off. It allowed me to get home and fix this issue. Thank you so much.

Thank so much for all your hard work! Because this just happened to me it took days and I am not as experienced as you to think of a ground. And was thinking about taking it in to a shop the I stumbled onto your video and well thanks alot man saved me alot of money!!!

Thank you soooo much , Glad i found this video before i bought a new throttle body or gas pedal , you saved me alot of money,, A snow storm was coming and i didn't know what i was going to do ,,, this was exactly what was wrong with my truck. this mourning my truck wouldn't even turn over , took me about 15 mins to fix it ..

So Awesome! Thank you for putting this video out there! On the way back from a long trip and issues hit as I was just getting home. Thought it was going to be an expensive and head banging ordeal. First video I saw and boom fixed! Didn’t even have to get dirty. Rock and roll.

dude you are my hero. I bought a used 2003 tahoe long bed for a good price but have sunk almost 3k into it trying to solve this issue.

630 in the morning...truck acts up...-7 outside...this video was perfect...exactly what the problem was..thank you

My dad JUST came to me with this issue. This video helped a lot. Thanks!

Thank you for charing your knowledge, I had parked my tahoe for 2 months thinking how much I was going to spend fixing it, and thanks to you video I was able to fix it in less than 30 minutes, thank you somuch

I experienced this issue for the first time ever in my pickup today as I was going to my new job and thought I was fucked. The wire turned that around immediately. You sir ensured I got to work.

Mine kept dieing intermittently when I would punch it off the line, thought it was just bad fuel but the ominus Power Reduction message appeared and I limped back home. Checked for that wire but everything was beautiful, looked at my relays and the fuel pump relay was cattywompus lol. Fixed it but wanted to say You have a unique style of teaching (Less BS) Subscribed...

Just ran across your video. My daughter's 02 gmc yukon xl 5.3 is doing the same thing. But she has other issues, the whole right side of engine is dead. Got voltage to the coils and injectors, but no signal to coils,injectors and throttle body sensor. Thanks for sharing.

Awesome video! My 05 has been driving me crazy saw this video found a black wire coming out of the harness with a little white tracer I’m assuming that’s the ground wire that is broken and I’m going to try it soon as I get home from work thank you for the help

Amazing insight. Thanks a million for posting this video. My problem is solved and I am on the road.

Ahhh finally, my ground wire had did the same thing. I have spent so much money over the past yr on this problem and nothing fixed it. I just now found this video, did the appropriate steps and this fixed it.

Super common the eyelet rots off them where they attach to the back of the cylinder head I spent a long time on a Silverado the first time I ran into this problem now when customers come in and explain there problem to me if they have that era truck almost every time it’s that ground. I’ve seen it probably 30-40 times now over that last ten years. It’s crazy how that one little ground causes all those problems

Thank you, Muchas Gracias my friends truck had the same issue and that ground wire was the problem like you showed on the video, God Bless you for sharing your experience, knowledge and your precious time

Man thank you for this got a 05 Chevy Tahoe my 3rd Tahoe and I never seen this issue thought the motor was locked up due to it not wanting to crank starter sounded like it was trying to start a locked up motor by far a good video man it was my problem and solution

Going to the shop tomorrow morning. Hope the fix is this simple ground issue. Thanks for the video!

The o’llll where there’s you’re problem line vids are the best thanks brother

Yes yes yes , my 2006 gmc reduce engine power came right on the highway, I had changed throttle sensor, from all those videos I saw , Thank you Sir because You saved me a lot of money , It was that little cable, today. THANKS

Thank you you fix my problem I really appreciate it hope you keep making videos much love God bless

Really great explanation of what the problem was. Thank you!

It worked. Saved me $$$. Thank you

Thank you very much. My truck just started doing this and you help me fix the problem right away.

I just put two new ground wires and a new battery on my 05 Silverado 5.3 motor. It started right up but this same light came on! I'm gonna try this tomorrow and see if the light goes out. Thank you

Hey guy heres 100 👍to your informational video, it was poiny on & fuxed our truck immediately, so 1000 thank you's to you!

Yes! This video just saved my day!

Great catch, But what was the wire connection to?? Ignition??

I've redone every ground on my Tahoe and still problems.. I was never able to find that one, and my vortec cover don't come off.. I didn't realize the nut stays on the cover.. lol will try that before ABS wheel sensor and ebcm fix..

rockstar youre a rockstar saved me diagnostic and tow. took me 5 minutes. 2006 sierra crew cab exact same wire

Not all hero’s wear capes! Great content very helpful!!

Hey, I'm broke down working out of town. I can't find that wire but I wiggled that harness and my gauges stopped, now if I turn the key on my 4wd lights and doors and everything works but when I start it they all stop. Do you think it could all be one problem? Thank you so much

Dude! I definitely owe you lunch lol. I gave the wire a light tug and off it came. I've been chasing this problem for days!

My 01 Tahoe loose voltage when stopped ... Do you think it has something to do with ground... Already replaced alternator and battery

I’m having a similar problem with my 8.1 vortec losing power to the cluster and going into limp mode. Do you know if this is a similar problem!

Thank you so much for the help on this, does the engine light ever come off?

I’m having the same problem. I will give this a shot!!

Hey I have a 2003 chevy silverado. I just replaced the MAF and the throttle body....it got dark on me so I was not able to check anything out. How do I clear the check engine light and the reduced engine power? Should this auto clear? Do I need to reset the idle? If so, how? Thanks!! Your videos great by the way! Good job! 👍 My dad was a mechanic so I remember a little bit....but we have no contact and I replaced this myself. So...any helpful hints would be great! Thank you!! 😊

I had the same problem I. My 03 tahoe Traced down a a bad alternator harness plug...replaced it...works great now

My son has called two days in a row from school describing this problem. When I drive it nothing happens. He has speed bumps at school. Can’t wait to see if this is the problem. If it is god bless you

Man you would not believe the stuff I replaced! Thank you so much

That just happened to me today same truck but done up thanks man your great help

Fixed my rig thanks to your video bless you sir

Amazing. Someone was telling me to swap the engine. You saved me my friend!

I have a 2006 Silverado truck and before I started getting reduced engine power, I had for years the dash saying, "Service Brake System." Here I am years later and now I'm getting reduce engine power but what I have noticed is when it happens, I just pull over and restart the engine and the truck works as normal again. I don't have the noise that this truck experience. The only symptom I experienced was that my speed would just reduce to a much slower speed. I noticed this would happen more often when I would travel great distances not necessarily due to hitting a bump. Do you think I could still have the same issue with a ground wire?

Mine just did this this morning reduced power and check engine light came on would the ground be the same issue I just replaced my plugs and wires last week my buddy said it could be a plug or wire that came loose why the power loss light came on any help please liked and subbed

Do I have to Sauder it or can I just twist them together with another wire with black electric tape?

My 2006 silverado is doing this. The wire you found is not the problem on mine. I need more info on all those additional grounds you ran yourself.... what all did you ground and how?

Thank you for the video! I am having the same issue but it started with my ABS light coming on after taking a sharp or bumpy turn. I will check the ground wires and the throttle body flange BUT do you think the ABS light is connected somehow to a ground issue; maybe the same one for the the reduced engine power? Obviously you cannot diagnose properly but thoughts?

intermittant intake sensor message have you come across this message and remedy?

My Chevy Avalanche Reduced Engine Power light came on this morning. Never had an issue before. Was having trouble with it starting so i think I may need a new battery, but didn't know if the battery may be causing that to happen as well? What do i know? I am trying this when I get home from work to see if it fixes the issue.

Thank you, just started having this issue will check the ground!

Hello my issues is that when I'm towing or going up hill if I step on the pedal and trying to Accelerate kinda hard the reduce power come on I just pull over trun off what a minute and it's gone I have to baby the pedal if I'm pulling alot of weight and I have a brand new throttle body? Is that normal? truck drive good with out the weight I could actually step on it or I'm not using the lower gears to help with the weight?

Thank you Amigo. Greetings from Texas.

My 2008 Silverado just had this happen. Thanks for the advice.

Thanks for the great info , but did some one knows from where is that wire come from? i would like to know the circuit diagram explaining what was this wire doing , that way it can help looking for that cable in others gm truck models ,thanks.

Thank you very much your video still saving lives and money 🙏

I have a 2007 Yukon xl apparently when I drive it like 20 minutes power reduce down idle issue n etc but when I push the gas won’t do nothing unless ,I turn it off n wait 20 minutes I’ll work perfect but after another 20 minutes it does the same issue I had change the throttle body still doing the same thing what could it be .Thank you

I have the same problem every time I hit a bumpy road but my car is a different model sierra 2008 and I’m still struggling for tow months now

Started my 2017 Silverado last night and it did this. However, I think mine is tied to something else. I used a fuse tap from a constant power cicuit (BCM I think) to run a circuit for my dashcam. I think the fuse tap may have created an issue to where it doesn't get a good connection in the fuse slot sometimes. My first problems I noticed was that my remote start wasn't working, windshield washer fluid pump wasn't working and I was getting O2 sensor faults. Wiggling on the fuse tap made the issue go away. When this reduced power issue happened last night, I wiggled a lot of my fuses and the issue went away. Not sure which one remedied the issue, but I'm guessing it was the BCM circuit I had issues with before.

Is this just on the 03-06 trucks? I have a newer body style 07 but not seeing this ground wire in that spot.

Thank you sir , I fixed my big problem , thank you for share , blessings!

what kind of wire did you use

Hey man I have a avalanche doing something similar and I can’t figure out what it is there’s no codes on dash and it just randomly won’t let me throttle it hard I’ll have to feather it up to 60/70 miles an hour. It stops after about 3/4 days and runs normal for months afterwards idk what the hell is going on but it usually does this after a good rain

Do you just cut the wire and reground it?

My Reduced Engine Power light came on after cleaning the throttlebody how do i fix that lol, can it be done without a scan tool thanks?

I have a 2005 Silverado. Turned it off and it doesn't want to turn over at all. Replaced the battery because the terminal post was stripped and still doesn't turn over. It's flashing Reduced Engine Power. Could it be the same problem as in the video.

Super video! I applauded for $5.00 👏👏

Would this apply to a chevy traverse bc mine is doing this?

I just had the same problem in my 2007 yukon denali it just lost power and the reduced engine power came on and the brake light and it won't go nowhere and I let it sit and it started to move

03 sierra Same issue legend you are sir

Hmm, sounds like the same issue I've been having for years and still having. Replaced throttle body, gas pedal & sensor still having same issue at random times like when driving or when sitting in park it will randomly pop up on screen reduce engine power & read traction off on 2002 GMC Yukon 4.3 Vortex engine. I don't know anything about soldering wires together but this is definitely something I'm going to look into. Nice video.

Thanks so much for this video! Fixed my employers 3500!

Thanks for the video although mine has a code for the pedal actuator. I think after I went through the car wash it happened. May have a water leak at the windshield or cowl. Fun times!

This can also be as simple as a lose battery terminal. Reduced engine power happened to me and that’s all it was, lose positive battery terminal.

Thanks so much for your help. Just happened to me follow your video I have the result. Again thanks a lot

I never had this problem with my '99, all the trucks after the square front end redesign seem to be riddled with problems that my early round body is not plagued with.

is it the solid black wire or the black with white stripe????? i cant make it out in the vid.

Really helpful information and easy to fix 👍 👌 🙂 😀

Thank You so much! Very informative!

Thanks bro! I just had to re-tape mine!

I can’t find that wire on my truck . Any tips on locating it ?

We tugged the wire and it came off. We spliced on a new wire and problem solved! Thank you so much!

I have a 2018 suburban this just happened to me 30 minutes ago, except my truck is shaking. And my fan is staying on because the temperature gauge is stuck on 0. Could this be the same issue?

Duramax? Does that repair work for all the Chevy and gmc trucks with the Duramax turbo Diesels?

I start d having problems with mine , If I ran into the gas station and came out , it would give me trouble starting or go into reduced engine power . If I let it sit it would start right back up ... It's started stalling out completely, I was getting away with a Jump box but that only lasted a couple weeks , my battery is good alternator good , says Engine misfire codes , but that's not the problem ... I don't know why it won't start without the jump box ? I'm not too savvy tbh , but I been at it for weeks and $500 later and counting. I looked for that wire on mine but it wasn't there , it was an engine swap so that may be why .. the wirings all jacked up in it

I have a question .my GMC Sierra pickup . the radio shuts off and comes back on When driving .. now When in park and turn the heater on the Engine stalls . and when I go in my truck to start it I get no power nothing no lights on dash absolutely no power at all . and then I retry and it starts up ? New battery . Alternator and starter ? Please help 👍🇨🇦

2004 chevy silverado 2500hd 6.0 omw home yesterday it went into engine reduce motor shut off while moving pulled into a parking lot started it up ran like shit but shut it off let sit for 5 mins ran perfectly fine after but in the power reduced I had no throttle does that sound like throttle body??

Thank You Sir!!! Thanks for sharing it!!

Did it clear the faults?

Do you think this applies to a 2015 Buick enclave