Chevy Trailblazer Idling Issue SOLVED simple easy fix 

Very important on a throttle body system that you actually use throttle body cleaner not regular carb cleaner unless it actually says safe for throttle body on the can.

My man! 2006 Trailblazer was sputtering at 400 rpms and dying soon after. This 20 minute job solved that and it purrs at 6 - 700. Thank you so so much, your video helped my family immensely. Thank you, thank you! I hope you have all the best in life delivered to you and yours.

Man, this video is great!! I have a 2004 GMC ENVOY that had all those symptoms. I cleaned the throttle body and it now runs perfectly. I can't believe something as simple as that would have a huge impact on the engine's performance. Thank you a lot!

Hallelujah!!! I travelled 5 hours from home in my 04 trailblazer when my heater started bogging down my engine at idle. Eventually the car shut off and would not restart. After a $100 tow and $300 garage fee all they could tell me was that fuse #28 was blown and upon replacing it they were able to start the engine. I drove 5 hours home and scheduled a service appointment at the dealership... meanwhile I do my research, came across your video. And cleaned my throttle body. I too was surprised that something so small and minor hindered the engines performance so much.. Thank you!

Thank you! Watched your video and did exactly what you suggested. It worked perfectly! Truck runs like new. You saved me/my family several hundred dollars by avoiding taking it to a shop. Thanks again!

I just fixed mine after watching your video. I appreciate ya!!! PSA: (2005 Trailblazer) You have to remove 2 of the ignition coils (10mm) to reach the two bottom bolts. Cheers!

I just did what the video said, and HELL YA' the truck is running much better! There was alot of gunk/junk in that throttle position valve. Made a world of difference!!! Recent repairs were: Belt, Map Sensor, Thermostat,Plugs, regular maintenance of course. But once I cleaned this this, the truck ran smoothHHH. Very little variation on RPM between 6-700 rpm's. Happy Days!!!

AWESOME DUDE!!! Great video--I did exactly as you said and fixed my idle problem. 2002 GMC Envoy. It wouldn't idle with the air conditioner on and kept choking down. That throttle body was filthy. Cleaned it with some carb. cleaner and now it works great. Thank you for posting this video! It was exactly what I needed to fix the idle. I couldn't believe it was the throttle body that was the culprit. Thank you. I didn't even disconnect the battery--just pulled the fuses and reinstalled them. God bless you and your family. W Rusty Lane K9POW in eastern Tennessee

thanks man my trail has 129000 miles on it and i really needed to change the spark plugs, the dealer wanted 400 sears wanted around 250. i followed you instruction and with tools and parts cost me 60.00

Same problem here. Turn on A/C and truck idles down and bogs out till it's dead. Autozone had me replace the MAP Sensor but thinking that's going back after I give the old one a good cleaning. One thing at a time though. Gonna go get some throttle body cleaner and give it a shot. I'll let you know what occurs. Great upload and extremely thorough. Thank you!

This video helped me with my 06 trailblazer..It was idling really low and a would only stay cold when driving. Cleaned throttle body and runs great...getting better gas mileage as well....thanks a bunch!!!

thank to this video I was able to fix the low RPM problems that I have on my 2003 Trailblazer, yes after I took it apart I saw lot of deposit clean that up set the fuse to the side that one indicated in my case I gave about 20 minutes put all back together place the fuses back where they belong and turn on the engine and oh boy the low RPM problems gone thank you so much this really help me a lot mister Aaron Moldovan :)

Dude!!!! Your video helped solve my issue perfectly!!! I cleaned the Throttle Body and did the fuses...Super easy! Totally worked! You rock man!

since all these modern cars use sensors and solenoids all over is it a good idea to pull that pcm fuse and negative battery terminal everytime you do ANYTHING under the hood even if your just unplugging things to check/get to other parts? or is it simply just for re-learning or updating codes???

Thank you much for sharing this information. I was able to get our old motorhome back running smoothly. I'm not sure that this actually fixed the real problem, but at least your post got me pointed in an untried path that got some results quickly involving only my cheap labor. Hope the best for your future! (I only did the battery and fuse thing, not the throttle).

The throttle body does not need to be removed. Use throttle body cleaner ONLY and clean the bore and throttle plate in-place.

This did help fix my issue on 2005 trailblazer (148,000 miles). I used throttle body cleaner (about $5 at local parts store) and saved a ton of money I would have spent at a mechanic. One thing I didn't understand though - if I disconnect the battery, why do I need to pull fuses too? Fuses don't do anything if the battery is disconnected.

I got some question will this happen to a 2000 chevy blazer if it idles to long it dies i also have my check engine come on well now im having it cause more problems

I picked up a trailblazer for a song and has the identical problems...i am a technician and should have known to do this...Ill five it a shot tomorrow...thanks for reminding me of the things I forget about...damn im getting old...

Dude, I cannot thank you enough. My 2006 Trailblazer now runs like New car. Had some trouble with cheap vacuum hose under the intake, crumbled in three places, had to rig it with new tiny rubber hoses and gorilla glue...minor setback, for a major successful overall result....New battery, New alternator, New idler pulley, new tensioner...$340, clean throttle body...priceless.

Do you pull the fuses after you disconnect the negative battery or before

Ty 4 posting! My 02 trailblazer is doing same thing but was told it was oxygen sensor.. being newly divorced after depending on a man to fix my car troubles..I figured I'd go to RU-vid I've learned so much! Can't wait to try this!

So I'm 6 years late to your channel, but glad I found it. I haven't done the work yet, but now I'll take 'er down and see if it helps. I have a 2005 Buick Ranier ...basically the same vehicle. Thanks!!

Thanks man, this video helped a lot

Don't use carburetor cleaner. They make a throttle body cleaner so you don't risk damaging electronic components.

i have a 2006 trailblazer and when i start it up on a cold night or after a cold night I have big problems....when it warms up she runs great. Any tips???

I'm having similar issues with my 04 trailblazer ls. Only thing is I have no Codes? I cleaned the throttle body. And sometimes it will just randomly cut off on me at idle. Not sure what it could be.. I changed coil packs, spark plugs and fuel filter. Wondering could it be the fuel pressure regulator? Idk. Any suggestions?

Do you take out fuses b4 or after you disconnect the battery

Would cutting off AC hose stop car from stalling and shutting off? I bought N 03 Tblazer AC hose is torn or cut off disconnected. I heard noise lastnight sounded like sumthin broke or was hitting sumthin idk sound bc I got scared howeva touched gas it made noise louder I said a prayer and noise stopped I went 2 my sis had bro in law test drive n chk all out no probs found. I swore noise was if was my motors lifter or sumthin idk exact noise but it was loud and seemed like Tblazer didnt want to go since I touched gas hrd noise get louder . It hppnd arnd 55mph after been on northway for a cpl times yesterday was first time I hrd that noise. But b4 that I got shaking and bucking no chk engine light is on and last night along with shaking and bucking was that loud noise as if a part was catching onto anotha part or as if was an heavy part making a noise. What wld make shaking n bucking then now a loud noise which each time it does shaking n bucking it's like a hesitation not wanting to still go but usually touch gas pedal n it stops the bucking n shaking actions so I try touch gas lastnight and it made the noise even louder. Now this suv drives really nice without issue being presented and issue presents only once in awhile yes usually per each trip out but it went frm hppng once to a few times the nxt day thn now theres times prob dont hppn until I've driven so many miles. I did notice when shake began was wen I tk cruise control off or try hold gas steady at 1 speed. But then now seems not to occur going steady if issue hadn't yet that day presented its self 4 shake n bucking actions . Idk I'm all confused as 2 y issue only comes once in awhile, why now seems of when it comes on it was worser lastnight bc came with an loud noise. I frkd out scared so no I cant recall wat exactly the noise sounded like but I do know it was loud and touch gas which normally straightend out my probs of shaking n bucking it hadnt lastnight fixed issue instd noise got louder. After noise hppnd I drove frm location on rd it hppnd to my sis place which was prolly 15 give or take miles while idling I noticed it 2 sound dffrnt I told my bro in law chk under hood I swore noise was frm under my hood and he said that the noise while idling was my motor lifter n its normal 2 hear it idk if hes lyin or guessing but I swore that noise was what hppnd where touched gas n it got louder thn all sudden after I prayed I was thn able get bk up to 55 like nothing and heard no noises again. Now is there a way 4 an motor lifter 2 make noises while driving and it cause noise get louder touching gas pedal but then stops noises and SUV bk 2 normal but then afta a bit idling afta hearing noise the lifter make sound while idling? Shut down engine turned bk on and that noise was eitha not there or was way quieted down. Wat wld be wrong if was my motor lifter that caused that loud sound and thn straightened bk out? Like if was bad I do no cld put sum rod threw an engine but this noise was like while climbing a small but bit steep hill now on northway it went fine and was no actions or sounds until I was off northway for miles I drove after I got off northway I hrd nada but thn that time the shake n noise scared crap out of me touched gas hrd it louder. What does my prob sound like it is? For a wk shake n bucked touch gas issue stopped wen picking up speed then lastnight came that loud noise with shake idk if was bucking 2 but touch gas didnt fix prob of shaking like normally it was doing. I have driven Tblazer for many miles maybe 1000 by now within a wk n that's see if issue wld stop but lastnight afta that noise hppnd it ran fine agn except idling 1 time hrd noise n bro in law said was motor lifter so sound went away n nada probs . Ok I've noticed they hkdup stereo with dvd player n otha stuff in it so dvd can play while driving so that's wrong then I notice they installed an remote starter 4 keypads n if I start auto with keypad seemz as tho shake n bucking is less I start it with keys seems issues are more often idk if how I start engins even has anything do with shake n bucking or the stereo hkdup wrong but I say wrong bc dvd not suppsd play while driving guy said his buddy did it so the kids cld watch DVDs while suv was being driven n also ac hose been torn or cut off. I'm suspicious is it that I just need an tune up but if so wat wS that loud noise I heard which touch gas it got louder thn it straightened up like nada hppnd yes I believe my prayer to God straighten it up but also maybe it wld straightened up later thn it had idk. Pls helpme. Only myselfies is main driver so actions hppn once in awhile not constant is y wen ppl try it out they not exprnc what I hear n feel bc wateva which I not figrd out wateva it is 2 make this stuff hppn once in awhile but once wateva must hppn 2 cause issues to occur gets 2 kicking in 2 cause probs is when they occur. I know tranny dont slip shifts normal but once I shift 2 or 3 times I noticed sum times bc held gas steady the shake n buck occurs I swore sounds like tranny tryn shift down or motor sound wen bucking occurs but I'm told noise was wheel bearings thn got thm chkd I'm told they old but tires dont move 4 the test so idk wats up yes I've hrd a clunk or scrape noise like in reverse I swore the rattle n clunk noise was oil pan touched a bump but 1st night I bought this SUV I heard an clunk or bash sound it didn't present its self agn thn got brk pads chngd which were really down 2 metal yesterday they were chngd so I figrd clunk came frm thm till lastnight wen I hrd loud noise n acted like sumthin was hitting sumthin or wateva n held me bk where touch gas was louder so I kept pedal steady 2 climb hill thn eventually coasted n touched gas after praying n drove fine. Cld tune up needed make loud noises also I got gas frm a dffrnt store . So b4 noise hppnd the dffrnc that occured ystrday frm my normal drive habits was I tk northway no probs , so higher speeds no probs, brk pads got chngd, used dffrnt store gas. I do think buck n shake means get tune up but that noise I need no if was motor lifter wat wld cause noise thn all sudden SUV bk 2 normal driving? cld throttle body dirty or sumthin due with gas or tune up needed cause a loud noise with the shaking n bucking ? If is motor lifter cld water in gas or wat cld make that thump or all sudden make noise? I was told a bad lifter or sumthin wrong with a motor lifter wld make noise constantly not come 1 time n disappear.

Just had the same problem and followed your instructions and now it works great, thank you very much Aaron.

Thank God You had this video, it helped, i saw another video and that one seemed too drawn out.

Mark another one up for Aaron! Did what he said and it runs like a dream! Thank you so much man!

Thanks! This worked perfect and saved my a lot of money today!

GOD BLESS YOU! You just save my husband some money. No one knew what was really wrong with my truck. Thank you VERY MUCH!

Thanks for the video, this was bugging the hell out of me trying to figure out why it kept wanting to stall out. Would do it with just the fan on and no ac as well. Glad it's fixed. Found this video while trying to figure out why my dash gauges were all screwed up. So 2 problems solved, like a new vehicle. Oh and mines a 2004 Trailblazer as well, thanks again!

Hi my trailblazer is 2005 model LT with auto climate control some times while idling the rpm goes down below 5 and check gauge light on and off Suddenly when the rpm goes up but If i disconnect the battery it will affect my ac actuator so how can i solve this rpm fluctuations my throttle body is perfectly clean but still this problem comes in between only at idling not while running kindly share your advice

Thank you great video👍👍

Nice, this is the exact problem I have with my 04 envoy. I'll try this tomorrow and let you know what happens haha

What does it mean when you have the defroster on and the engine starts shaking I have a v8 2003 Chevy trailblazer

Thank you for your video. My question.. If no codes have been tripped do i still need to remove the fuses & disconnect the neg cable just to clean out the carb/throttle control area

You mention the codes you received. Not listed. What were the codes at that time if you remember? Thank you in advance

In your description you said take off positive terminal off battery. But in the video you said positive and switched it to negative. Its negative right? I was told always take negative off first when disconnecting battery. The when installing positive first then negative. Although with the trailblazer and envoy. You dont want to take battery off because the computer doesnt hold its memory like other vehicles.

ya this totally worked for my 2006 trailblazer, it was really simple and only took an hour, no new parts required!! thanks very much its like brand new!! :)

Its works! Thanx man!

I dont usually comment but that worked like a charm thanks keep up the good helpful videos

Did it have a strong gas oder coming out the tail pipe? Mine is doing that as well as the smell

very helpful , THANK YOU I APPRECIATE YOUR ADVICE BRADEN

It’s important to use actual Throttle Body Cleaner. Most other solvents are too aggressive for the internals

Carb cleaner is harsh on rubber orings seals and electronic components, soo is brake cleaner I only use specifically for what it's made for ,also I believe disconnecting the battery without pulling any fuses is good enough

So... Question. I have an 07 envoy. Major problems with it. Can a dirty throttle body cause my battery to die while idling? My car shakes at stop lights or in park. Ive had it replaced just to still have problems again. Whenever it rains a lot-- my low power engine light goes on. Due to a hole in the hood and water dripping down there. GM even recalled about this and no solution!

Thank you very much....it really worked...Aaron Moldovan thanks to save my money to change the alternator because every mechanic suggest me to change the alternator to resolve this issue. But meanwhile your video worked. I highly appreciate your diagnose and recommend this video. It seems this video was specially for me!!!!!!

I did this and im sure i put it all back together correctly and now it accelerates on it’s own, any idea why?

does anybody know what the wire harness clip next to the back to coilpacks on drivers side go to? If i tap on it or wiggle it even a little it makes my vehicle run rough for a few secoumds or die.. i have been tryin to find out what its to for 2 days n its been givin me a run for my money

What will cause my trail blazer to sound loud while driving? And how up on the rmp does it normal suppose to go?

What happens if I don’t disconnect the fuses and the battery?

I’m working on one right now and it does not accelerate or reverse any reasons why?

Thank you so much bro. I have been through so much with this and you just solved my problem! I wish I knew you so I could buy you a pizza and a beer. God-bless you and I'll see you in heaven brother.

Yes this is very common in my engine is stalling after cleaning the Throttle body so I’m having other issues

Do I disconnect the negative side of the battery?

My Trailblazer does not stall out however the idle is very low especially with the AC on, it also has a chatter type noise but does not burn any oil. From a start it has no power unless it is completely floored and then once it reaches speed it is ok. Does this seem like yours?

Yup the only way to properly clean the TB is to remove it. This can also cause dim headlights and no AC because of slow idle. Remove scrape and spray and scrape again until clean.

Hi Aaron, i watched your video and i did the same but it didn't help with solving my problem, my issue was some time during idling and i turned the A/C on my engine went off but my idle rpm is normal. and the second issue during driving at 4th speed and rpm 2000 the rpm start staling up n down between 1600 to 2100 so do have any idea what cause that please help.

I wonder if the same issue im having went shopping around for a few hours with the a/c on and out of nowhere the car shut down on me on a red light didn't fcking move block traffic then the car started up after a few minutes smh so it that damn throttle that causing the problem

Hey, I'm having this same issue. After everything was done did you have to do an idle relearn?

Best video ever! I have cleaned the throttle body and entire area, sensors, spark plugs/coils, intake, etc. But Never heard or read about pulling the PCM fuses! I replaced oil sending unit and crankshaft sensor, but kept having low oil pressure/stop engine when sitting still idling and couldnt figure out what else to do. There might be a couple of other things i need to do, but I'm going to follow this video first and see if that helps. Thanx So much for sharing a piece of info that Ive been missing for 6 months! Erin

Appreciate you bro thanks

Awesome thank you

I have the same problem on my 2003 Trail. did you have to purchase a gasket for the throttle body ? but I do have those effects after I turned the AC it will even shut down the engine and the AC is working properly

Aaron I'm losing power on my 2005 gmc envoy and we did everything and still nothing any advice will help please thank you

It worked! Thank you and very much appreciated!

THANK YOU!!

I have a question as well, my 03 trailblazer ext has a rough idle. a couple of months ago I had a misfire in #4. replaced the coil pack on that one. this week it was misfiring again. same issues rough idle, cruise control not working, check engine light flashing going faster than 15 mph. had it scanned and it showed a misfire in #1 replaced that coil pack, changed oil sparkplugs ect. the scan also showed my fuel pressure regulator was leaking. I just put that in and I still have no cruise control and the idle is still rough. not shaking like the misfire but it sounds like it's going to stall and then the idle picks back up again. The check engine light is still on. what should I look at next? Does the throttle body need to be cleaned? I'm kinda at a loss.

I had good results withAMSOIL Power Foam, sprayed in while engine runs.

I’m having same problem I thought it was an injector I’m gonna try this

I'm trying to find someone with knowledge of issues I have with my 5.3 after a motor swap all of the issues are electrical false readings on my diagnostic and and erratic working issues with my odometer and my heater AC all work sometimes and work without manual use other times ??

i get a p1509 code but get the same symptoms but car only stalls out when i come to a stop do to the rpms just dropping every once in a while

I heard that using carb cleaners will damage the coating in the throttle body but you used it anyway.... So did everything went right with you ??

It doesnt matter disconecting either pos or neg terminal right? Also after i cleaned TB. It idles at 1000 for a minute then slowly very slowly works it way to 600. Let it idle for few minutes then shutoff. Minute later start it up and repeats same process of starting at 1000 and slowly down to 600. Maybe it will take some time for pcm to relearn. Its done on a 2007 ascender/trailblazer

My car is having the same issue (same car as yours) with the ac BUT my car is also shaking is this the same issue you had????

Mine is rough idle and like no power when I drive. I put new plugs and replaced coils and still rough idle

You should of have a video cleaning the throttle body and removing it would really help

It works!

Thank you so much!!!!

I like your style! Gonna try this on my '03 Trailblazer tomorrow. 280,000 miles

Hello I have a 03 envoy it seams to idle pretty good, and doesn't die when i turn the ac on, BUT when you driving it you can feel some power loss and when you driving and you let off like to slow down and turn it dies. Cranks back up like nothing never happened. It has thrown code about egr but i dont think it has egr and auto zone don't have a part number for one, but it did that years ago. Just the other day it thrown i think po130 and i believe that is an 02 senser but scared to buy it just incase something else is making that act up, because it doesn't do it all the time just randomly. Please someone help

if you dont move the butterfly you wont have to worry about the fuses. you can actually damage the throttle body by moving the butterfly due to it having electronic components and its programming.

My car is a 2006 Chevy trailblazer and I bought it in March and out of nowhere it just turns off I cannot have the AC on and when it turns off I had to jump out of the car put oil in the motor in a trance back on but it turns off again and I don’t know why can you please help me

Please anyone know about what may this bur sound be in my GMC truck 2004 while driving Vehicle turn off after a mile .change out new battery ,new starter tested alternator is good.

Omg I have the same issue removed the battery and the fuses and is working good now thank you so much for saving me money Aaron

I’ve got no lights on dash, the other day the service soon light came on while engine lagged while getting up to speed between 55-60 mph during a more laxed acceleration and has a rough idle while stopped. Scanned and no codes.. could it just be fuses and a clean down that I need?

When you remove the throttle body to clean it is htere a gasket that needs to be replaced?

Hi I have a problem with my 2005 trailblazer, when ever I go up an incline I get a problem where i get about 3000 to 4000 RPMs but I only do about 20 -30 MPH and I can't get any higher than that.

Thanks bro.. You solved my problem

I also have a problem with my front vents, they don't work! I've read were disconnecting the battery and resetting something will fix the problem!

What codes were u getting ?

Mine is having this same problem right as I needed an oil change. Changed the oil and started running fine but the rough idle was still there. Headlights get dim sometimes too. Going to try cleaning the TB and hope this clears it up!

Great video! I own 2 03 trailblazers and cleaning the throttle body almost needs to be done at every oil change. It gets dirty so quick on em. I did not know about pulling the fuses to relearn part though. Thanks for that! One thing I will say is to avoid disconnecting the battery at all costs on these things though. The actuators for the ac are notorious for messing up when the battery gets disconnected and turns into a whole notha can of worms nobody wants to play with. Hope you’re having a good day.

Hey guys I had to get a new battery put in the other day. My 2004 trailblazer ran like a dream prior to me doing this. I've cleaned the throttle body changed the filter and it improved a bit but it still hesitates and sputters and rides extremly BAD, service engine soon light flashes as well. Any more novice suggestions or should I just bite the bullet and take it to the shop?

I have done this but I am still having the same problem. At first it was idling a lot better but as soon as I press on the gas it just goes back to the same thing. I have put in new fuel filter and pump. I'm kinda lost as to what to do next.

Thanks bro!! I have an 03 TB n was like wtf with the idle!! I'm in Chicago n it does the same thing while the heats on but doesn't when I shut it off.. 2 cold rn 2 mess with it tho lol