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Prev Professional Automotive Repair Technical Discussions for May 10, 2008
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1987 Buick Electra Limited 3.8L Extended crank time VIN: 1G4CX5130H
This vehicle has an extended crank time when cold, or after its been setting for a couple of hours. It has spark and fuel pressure when the problem occurs. Other wise it runs great. It also seems to have a longer than I think it should crank time even after se...
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1998 Cadillac Eldorado ESC 4.6L Stabilitrak VIN: 1G6EL12Y5W
This vehicle exhibits unwarranted Stabilitrak engagment while driving. This mostly occurs while turning left about 25 MPH, however it will also occur while driving straight under light acceleration. Sometimes the "STABILITY ENGAGED" message appears on the HUD,...
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2001 Chevrolet Express 2500 5.0L Hesitation, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1GCFG25M21
help! we had the trans. rebuilt about 1 week before this problem started. the van is loaded heavy but since the c.e.l came on it has lost power and fuel mileage. we have checked for vacum leaks and any unmetered air entering the engine. we also replaced the f... Trouble codes: P0101
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2003 Chevrolet Malibu 3.1L noise VIN: 1G1ND52J03
good morning gm techs need help here/// this malibu has a rattle sounds like it is coming from l/f but it almost sounds like a dash or something under the hood rattle// when i drive low speeds over bumps it rattles never can here it when i stick my head out th...
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1997 Pontiac Sunfire GT 2.4L No Start VIN: 1G2JD12T7V
Hi I have a no start, the PCM will not energize the relay wich powers the fuel pump and the injectors. Fuses are ok and tried used PCM. Am in the process of checking power and grounds to the PCM. Will check ign switch and post update. Does anyone have other id...
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Fixes & Summaries for GM
Fix/Summary Answers
2000 Chevrolet Silverado 1500 4.3L Hesitation VIN: 1GCEC14W6Y
Thanks for all the help. I was able to get it to act up and make a movie on the scanner. At 45 mph, during a hard acceleration tps @ 85%, the maf reading 15.55 gram/sec, both o2 dropped to 10 mv. fuel trim jumped to 199, and inj pulse went to 22.55 ms. So I kn... Trouble codes: P0171, P0174.
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2002 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 2GCEK19V82
Hi Guys: Thanks to all eight that replied. Most said that the charcoal canister had loose charcoal that cloged the purge valve. I removed the purge valve and shook it over a white piece of paper. About 10 pepper sized particles and a slightly larger rectanglar... Trouble codes: 443 (purge valve performance).
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2005 Chevrolet Aveo LS 1.6L Poor Idle Quality, Hesitation VIN: KL1TD52695
I received a few responses, and it seems that the problem is caused by the valves in the cylinder head not seating. There is a TSB out on this. It involves replacing the valves with a revised design...way expensive for a Aveo, especially when it's a hail damag... Trouble codes: P0106 (map sensor performance).
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1996 GMC Sonoma SLE 4.3L MIL Lamp on VIN: 1GTCS19X2T
As most of you said, the aftermarket cat converter is not the way to go...so after emptying this guys wallet further, I installed the oem converter and viola! its fixed!!! thanks for the help, sorry it took awhile to close this, I got tied up putting an engine... Trouble codes: P0420 (catalyst efficiency).
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2005 GMC Envoy Denali 5.3L MIL Lamp on VIN: 1GKET63M35
THANKS FOR ALL REPLIES.THE MOST COMMON WAS TO CHECK THE FUSES.I OHMED EVERY ONE IN THE VEHICLE,AND THE LIGHTER WAS WORKING.THE VEHICLE FELT LIKE IT HAD A MISFIRE AT IDLE,BUT I CHOSE NOT TO WASTE A WHOLE BUNCH OF TIME AND PARTS CHASING IT,AND THEN NOT BE ABLE T...
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1970 Oldsmobile 442 455CID Poor Idle Quality, Misfire VIN: 344670M371
i apologize for being so long in responding to all the great help i received, this car was a fill in job and we were given all the time required by the owner. the answer to the problem was a bad carburetor, the idle circut and the main metering circut were all...
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2002 Pontiac Grand Prix SE 3.1L transmission VIN: 1G2WK52JX2
Sorry it took so long to get back to you I ended up R&R trans With low miles used trans. I replaced epc selnoid in the new trans before installing it. The trans. works great thanks for all the help
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