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Prev Professional Automotive Repair Technical Discussions for October 25, 2004
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Open Help Requests for GM
Help Request Answers
1997 Buick Park Avenue 3.8L Gas Guage VIN: 1G4CW52KOV
Hi Techs, I have this problem given to me by a Tech that just quit on us. He put in a a used dash guage cluster because the gas guage was moving from half full to empty and back to about 1/4 tank. I haven't had time to look at it yet and I was hoping as to som...
1994 Cadillac DeVille 4.9L Hesitation, Misfire VIN: 1G6KD52B3R
costumer complain of hesitation when vehicle cold, i recomemded a major tune-up since vehicle is 10 years old (63000 miles) and never had one, vehicle worked fine for 2 weeks and the hesitation returned, the problem is intermidiante some times it does it and s...
1994 Cadillac DeVille 4.9L MIL Light Code 91 VIN: 1G6KD52B6R
This vehicle arrived with a code 91, defective or mis adjusted transmission lever postion switch. We tested it thoroughly via GM flow charts, the detailed 1 and 0 tests, repeatedly, and it passed. We replaced the switch, checked the alignment impeccably, went ...
1997 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY22G9V
The check valve has gone bad again on bank 2. The car runs great, with no drivability concerns. To change the check valve, you have to pull the intake off(Is located in rear of engine) - Scan testing all sensor values, etc. are fine(o2 sensors working great)HC... Trouble codes: 1416 (air inj. system bank 2)
1998 Chevrolet K1500 Cheyenne 5.7L Turning VIN: 1GTEK19R5W
Customer came in a few weeks a go with a stearing problem. He stated that he installed a stearing sensor recently due to drift. One problem solved. He also has a difficult time turning the wheel to the left during low speeds when entering his driveway (under ...
2000 Chevrolet Express 3500 5.7L No Start VIN: 1GCHG35R5Y
hello everyone, van was towed in with a crank no start condition, fuel pressure within specs(60psi), has spark at the plugs, injector pulse ok, and it will run on propane. i tried an injector balance test on it with my scanner to check for sticky poppets and e...
2001 Chevrolet Malibu 3.1L electric door locks VIN: JX16276707
The electric door locks on my daughters' 2001 Chevrolet Malibu won't unlock automatically when the ignition is turned off. You can lock and unlock them manually and they still will lock automatically when the car is put in gear. I have no access to a manual or...
1998 Saturn SL2 1.9L MIL Lamp on VIN: 1382J5272W
this saturn has an evap code that comes back quickly, i did a smoke test, negative results, checked the filler neck, top of tank, ccv on neck, all seem ok. found 1 soft hose( from oil leak) at solenoid valve under intake, replaced it. checked integrity of evap... Trouble codes: P0440

Fixes & Summaries for GM
Fix/Summary Answers
1988 Buick Reatta 3.8L Hesitation, Cuts out VIN: G4EC11C6J8
Got a few responses that led me to explore the MAF sensor. Tested the circuit and found no problems and no codes. After checking all other avenues I decided to replace the MAF sensor. That did eliminate the problem. Point is that even if a circuit tests ok, so...
1996 Buick Regal Custom 3.1L Hesitation, Surge, Cuts out, Misfire VIN: 2G4WB52M5T
THANKS FOR ALL THE HELP...after i got my head straight i cleaned the mass airflow sensor, and no change, then i pulled the harness from the ingnition module from the misfire sensor(crank sensor) and someone had butt connected the wires to gether and i replaced... Trouble codes: N0NE.
1998 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52K7W
98 Buick LeSabre fixed! I received 30 replies over the weekend and all were appreciated. A couple of people suggested it was a compression problem and I should check there. The majority of the replies came in before I was able to amend my post with more inform... Trouble codes: P0300 (Random Misfire).
2001 Buick Regal LS 3.8L Ignition Lock Cylinder VIN: 2G4WB55K71
Thanks to all who responded. Special thanks to Richard from Indiana, who took the time to explain in detail how this system works. Like most of you said, the problem was indeed the Park Position Switch that is incorporated into the consol shifter assembly. It ...
1993 Chevrolet Cavalier RS 2.2L unknown VIN: 1G1JC5243Y
1994 Chevrolet Corvette 5.7L updated reflash VIN: 1G1YY22P0R
received 3 replies. thanks to James & john for the g.m. web site info. there was no other updated calibrations or calibration for the g.m. performance cam. this info will be helpful to us in the future for checking calibration updates for other g.m. vehicles a...
1996 Chevrolet C1500 Cheyenne 5.7L Temperature Guage VIN: 2GCEC19R9T
Thank you all for your replies, and my appologies for the lengthy reply time. Customer returned the following week with the vehicle. I had made a potentiometer to check the temperature guage operation, I was going to perform a block test, and possibly remove t...
1996 Chevrolet Cavalier LS 2.4L Balancer shaft timing VIN: 1G1JF52T2T
Hello everyone and here is what i found. The crank must be put at TDC..then rotated 90 degrees. Then tighten the gear onto the shaft assembly with the flats up...towards the top of the engine. Basically, the flats need to look just like they do on the pictur...
2002 Chevrolet Avalanche 1500 5.3L erattic shift VIN: 3GNEC13T02
had a bad ignition switch changed the switch and solved the problems. thank to everyone for their replies.
1998 Oldsmobile Aurora 4.0L Cooling system VIN: 1G3GR62C3W
The overwhelming majority of replies pointed to a problem with the heads, and or, headgaskets. I do not have a gas analyzer, so I could not check for hc's. Repeated checks with a CO detector showed nothing, which leads me to not totally rely on a CO test. Howe...
2001 Oldsmobile Aurora 3.5L trunk VIN: 1G3GR64H11
we did not find enough info for this system in our m.o.d. 3 replies to problem 1 suggested may need tech 2 scan tool to access b.c.m. car is going to dealer and i will post fix at later date.
1998 Pontiac Bonneville SE 3.8L egr passage VIN: IG2HX52KWH
hey everybody; most techs think its a restricted exhaust, 6psi a too high. one tech wrote maybe with the vehicle sitting in the shop 2psi is max exhaust back pressure but driving down the road at 65mph then going to wot ( this is the test i performed)6psi ...
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