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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 14, 2010
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Open Help Requests for GM
Help Request Answers
1989 Buick LeSabre Custom 3.8L Poor Idle Quality, Cuts out, Stall VIN: 1G4HP54C8K
Customer complaint of stalling when coming to a stop. Will stall or try to stall when in drive or park. Can Remove Stop Fuse in the inst panel fuse block and it will not act up at all. I know this is limited info but any help would be great. Thanks
2003 Buick LeSabre Limited 3.8L Cuts out, Stall VIN: 1G4HP52K43
Vehicle came in as a no start. Has been to two shops and the dealer. Had fault code PO101 mass air. Cleared code and vehicle started. Dealer replaced mass air, and pcm. You can drive for 3 to 30 miles and it will stall setting a PO101. Vehicle will not restart...
1996 Cadillac DeVille Concours 4.6L Charging VIN: 1G6KF5290T
This vehicle came in not charging.Alternator replaced.2 weeks later it returned,tested alternator with GM tester aand alternator tested fine.Found ECM not signaling alternator to turn it on.Traced wiring OK.Replaced ECM and alt connector.Still no good .Need he...
1993 Chevrolet K1500 Suburban 5.7L radiator VIN: 1GNFK16K1P
instaling new oil cooler lines, dont fit to radiator fittings
2000 Chevrolet Malibu LS 3.1L compressor clutch VIN: 1G1NE52JOY
I replaced the controller because the signal was not consistent and A/c request was difficult to command On. After that the compressor clutch still did not energize, but the BCM is receiving the request and there is battery voltage at the lt. greem wire when s...
2001 Chevrolet c7500 8.1L backfire VIN: 1GBM7H1E21
At a steady cruise 55 M.PH. decelerate and Kaboom, sometimes 2 or 3 times out of the exhaust , but not as loud as the first backfire, I would think the muffler should be gone as loud as it backfires. We normally don't work on these trucks , but since it had th... Trouble codes: P0522, P1633
2002 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 3GNFK16T02
Vehicle came in with P0332 stored. Cleared code and code came back before monitors could complete. We have done 3 of these year model vehicles with with the 5.3L V-8 and the P0332. In all previous cases we have replaced both sensors, sub-harness, and performed... Trouble codes: P0332 (Knock Sensor Bank 2)
2003 Chevrolet Silverado 2500 HD 6.0L steering pump VIN: 1GCHK29U73
In January this truck came in with no power steering or brake assist. The pump had been noisy for some time. I replaced it with a rebuilt Cardone pump and after about 3 days it too failed. This time it was a broken shaft. The truck worked well until yesterday ...
2003 Chevrolet Avalanche 1500 5.3L 3-4 shift VIN: 3GNEC13T13
This vehicle top transmission cooler line at radiator the little metal wire that retains line in place had worn off and the line came off and loose all fluid. customer says this happened on the road. Someone came along and modified retainere and got the line b...
2004 Chevrolet Venture LS 3.4L drivetrain VIN: 1GNDX03E84
on a slight right turn ,slow speed a clicking noise is heardin front end--- turn wheel a little either way noise disappears not a tight right ,,, but 1 or so revolutions to right hand side replace both front bearings and check cv axle very good boots look fine...
1999 GMC Yukon SLE 5.7L Poor Idle Quality, Cuts out VIN: KEK13R9X1G
Dear GM techs, I've got a yukon hear I could really use some ideas for. I'm missing something but i just don't know what it is. This vehicle starts and runs great with no problems with the engine cold but as soon as it gets hot it starts to stumble and then it...
1998 Pontiac Grand Prix SE 3.8L Poor Idle Quality, Surge, Stall VIN: 1G2WJ52K1W
Asked for MIL check and off-idle acceleration miss. P0440 needs a new filler neck, not realted (IMO) to present problem. When engine is at operating temperature, will stall coming to a stop at 30 km/h or so. At a steady idle,engine running fine, NO MIL (codes ... Trouble codes: P0440 (Evap large leak found corroded filler neck unfixed), P0135 (heated O2 htr code B1S1 tested ok this time), P0172 (fuel system rich)
2002 Pontiac Montana 3.4L Stall VIN: 1GMDX13E22
This van will stall intermittently, but mainly when throttling while backing up. After stalling it will not restart unless the key is turned to the off position first, it will then restart. No codes are set. Any help will be deeply appreciated.
2002 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NF52E82
Hope some of you GM techs can help me out. This grand am will not start after it sits overnite. It has spark and fuel pressure is normal. There is no injector pulse when this occurs. There are no DTCs. Another garrage replaced the fuel pump before we got it. W...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Chevrolet S10 4.3L Poor Idle Quality, Hesitation, Surge, Poor Fuel Economy VIN: 1GCCT14Z4M
Ok, first off I would like to thank all the members who helped me including Chuck, TW, Joe, Peter, Don, James, Sherman, David, Bill, Dennis and the rest of the folks who said it sounds as if the Distributor is the culprit. What I did after the help request arr...
2002 Chevrolet Trailblazer LTZ 4.2L power windows VIN: 1GNDS13S82
Thanks to Barry, Andrew, and David for help. all three sugested that the problem would be with one of the various modules, what we found was that the passengers window/seat heater switch had developed a problem with sensitivity to temperture, when it would war...
2003 Chevrolet Tracker ZR2 2.5L MIL Lamp on VIN: 2CNBJ73453
I called in Jim Garrido " Have Scanner Will Travel " He had access to information that I did not have, He found a black connctor in the right kick panel # 212 that was not locked together. That repaired my o2 sensor heater and my ac and speedometer Thanks to... Trouble codes: 161B (155 -), 155 (141b -), 141B (135b -), 135B.
2004 Pontiac Sunfire SE 2.2L Poor Idle Quality, Back fires VIN: 1G2JB12F24
I think we have tracked down the issue. Last week when the car was in the shop we could not get it to act up. So we ran a few test and came up with a bad ignition control module. So we replaced the coil pack and ignition control module. He since drove the car ...
2002 Saturn L300 3.0L MIL Lamp on VIN: 1G8JW54R52
Sorry for how long it took to close but I wanted to make sure I didn't get a call back. The crank sensor took care of the stallinf and the O2 sensor took care of that code, like I expected. As far as the park/neutral switch code that wouldn't go away there w... Trouble codes: P1780 (PNP Switch/Mil request by TCM), P0335 (CKP Sensor A Circuit), P0050 (HO2S Heater B2S1).
2003 Saturn Vue 2.2L Mechanical VIN: 5GZCZ43D53
Thanks to all who responded with advice and info. The majority view on this gearbox is to drop the job or replace with Saturn reman, and expect a short life on the replacement piece. I have not pulled it apart but did check it out on the rack and found that th...
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