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Prev Professional Automotive Repair Technical Discussions for October 23, 2012
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L No Start VIN: 1G4CW52L4R
looking for some ideas...this park avenue cranks but will not start, i checked the basics,i have fuel pressure but i do not have spark, i dont have a scope to check the cam and crank sensor but i do notice that when i crank it the rpm gauge is moving. customer...
2004 Buick Rainier CXL 4.2L Front Diff. VIN: 5GADT13S44
Hi all and thanks in advance would like to know if anyone can tell me if the oil pan has to be removed to pull the front diff. On this buick(trailblazer) alldata says its got to come off but looks like it might snake out with pan on any input would help thank ...
1997 Cadillac DeVille 4.6L Poor Idle Quality
this vehicle has an intermittent very high idle, but if you shut the engine off and restart it when codition occurs the idle returns to normal, also when idle ramps up hvac blower motor goes to defrost only.cleaned excessively dirty throttle body, changed iac ...
2000 Cadillac DeVille 4.6L Surge VIN: 1G6KD54Y7Y
hi guys customer bring this car in engine surging in drive new parts was replaced throttle body and mass air flow he state after cylinder heads was replaced problem occord 1 mth later scan test no codes smoke test intake no leaks check o ring adapter between i...
1996 Chevrolet Monte Carlo Z34 3.4L Misfire, MIL Lamp on VIN: 2G1WX12X0T
This is a dual overhead cam 3.4 engine. Customer complaint was high unstable idle at times and misfiring at idle. High unstable idle was caused by a bad mass air flow sensor. Replaced sensor, unstable idle fixed. Misfire is the real problem. Misfire is only on... Trouble codes: P0300 (Random Misfire)
2001 Chevrolet Venture LS 3.4L Misfire VIN: 1GNDX13E31
Car runs rough on a cold start for about 15 seconds and then it will run smooth. Car runs fine on a flat surface but as soon as you start going up a slope (25 deg.), it sill start loosing power, if I will step harder on the accelerator pedal, the Check engine ... Trouble codes: P0300 (Random misfire)
2001 Chevrolet Impala LS 3.8L Cuts out, Stall VIN: 2G1WH55K61
Customer reports vehicle dies while coasting along around 25 MPH and vehicle is cold. Verified problem, no check engine light, but code was stored: p0103 - mass air flow circuit signal high. MAF tests ok at this time. Suspected MAF signal out of range or ignit...
2004 Chevrolet Colorado LS 3.5L 4 wheel drive VIN: 1GCDT13694
when press the 4 hi/low switch, the light just flashes and heard a clunk noise from under. When put on 2wd drive the light flashes a couple times than stay solid (normal). The drive shaft to the front differential was spinning but not engaging in 4 hi/low. I w...
2008 Chevrolet C4500 Kodiak C4C042 6.6L Stall VIN: 1GDE4C1908
Hey all the 6.6 gmc is stalling and will restart but at times it will not restart... I have been doing service on this fleet for a long time know but i will subout repairs I can't do but in this case i was asked to do my best because it has been sent to the de... Trouble codes: P0675
2003 GMC Sierra 2500 HD SLE 6.6L brake pedal VIN: 1GTHK23153
First, thanks for taking the time to read this. I have this 03 Sierra HD with Hydroboost brakes that has excessive pedal travel. Brakes work fine and stop good. No sign of leaks anywhere in the system. No codes in EBCM. No red brake warning light or brake mess...
2001 Oldsmobile Bravada 4.3L brakes VIN: 1GHDT13WX1
Vehicle came with other shop repairs done at 3 other shops but they could not fix the problem.. brakes slowly go down almost to floor (spongy) and sometimes has a hard time releasing. Other shops had put in 3 new brake boosters, one of which is still installed...
1995 Pontiac Trans Sport 3.8L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GMDU06LBS
Thanks in advanced for your help. we are mainly a European shop but this minivan belongs to a really good client of ours. Here's the story, this transport runs very rich at idle when hot and at start up. At the same time that is runs rich, it also surges at id... Trouble codes: P0172 (Fuel Trim Rich)
1997 Pontiac Grand Am SE 3.1L Hesitation VIN: 1G2NE52M2V
Runs good cold but when hot engine hesitates only when data shows ignition timing being retarded to 2 degrees before top dead center even when knock senor is disconnected. at idle in neutral or in drive timing is 19 degrees and when in neutral timing advances ...
2000 Pontiac Bonneville SE 3.8L hub bearing VIN: 1G2HX54KXY
I have been using national hub bearings on gm cars for the last couple of years and recently i have them last only about 3 months and they go get loose and noisy. i replace them with the same brand and they seem to not last. i wonder if this is a problem with ...
2007 Pontiac G6 2.4L Misfire, MIL Lamp on VIN: 1G2ZG58B17
Hello fellows (iATN members). I have this 2007 G6 with a trouble code P0171 and P0300 that keeps poping up. I have replaced the cataytic converter do to a trouble code P0420. I know the cat was bad as soon as I saw the O2 sensors on the scanner. Now I have to ... Trouble codes: P0171 (Lean), P0300 (Misfire)

Fixes & Summaries for GM
Fix/Summary Answers
2003 Cadillac CTS 3.2L Key Stuck In Ignition VIN: 1G6DM57N23
well, i decided to send this vehicle to the dealership. customer called me back and the dealer said that p.side door control module is the problem. thanks for all the information.
1997 Chevrolet S10 LS 4.3L engine VIN: 1GCCS19X1V
Installation is easier than removal. We lifted the cab, and slid the transmission back as far as we could, and it made installation somewhat easier. I didn't think that this job would be as difficult as it was. Thanks for all the help!
1999 GMC C2500 Sierra SLE 5.7L Poor Idle Quality, Misfire VIN: 1GTGC24R7X
Customer did not approve further dignoses or repair . Thank you for all of your replies could not continue enough to be very helpful
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