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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 6, 2004
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Open Help Requests for GM
Help Request Answers
2001 Buick Century Custom 3.1L subframe/body VIN: 2G4W552J31
I am posting this help request for a fellow tech. He is trying to locate the source of a light clunk/creak noise from the front suspension, during acceleration from a stop and some times when coming to a stop. he says it can be felt through the floor. Loading ...
1991 Chevrolet Camaro RS 5.0L Cuts out VIN: 1GMWE456H2
Hello all, I have a crusty old camaro in the shop with a fuel problem- customers complaint is that the vehicle will run for a few miles and then stall and will not restart until it cools down. The vehicle does not lose spark but does lose all fuel pressure. We...
1996 GMC C1500 Sierra SL 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2GTEC19W7T
Hi Pros! After R&R of intake manifold, this baby idles beautifully, but as soon as I rev the engine for a few seconds, it starts to over-fuel and cough and sputter. Horsepower down 50-60% under load. If I leave it alone for 2-3 minutes, idle smoothes right out... Trouble codes: P0300 (Random misfire detected)
1998 Oldsmobile Silhouette Premiere 3.4L Excessive Emissions, Misfire, Poor Fuel Economy VIN: 1GHDX03E2W
Thanks in advance for your help! We brought this van in with code P0300 set, Customer said when she started it up cold she could feel it miss. Now it runs pretty good except for the fact that the PCM is trying to subtract fuel at idle as noted by the fuel trim... Trouble codes: P0300 (random misfire)
2000 Pontiac Grand Am SE 3.4L Cuts-out/high rpm
Customer returned to garage and complained of his vehicle cutting out while driving. I drove his car for three hours without a singal indication of any problem. Costomer returned in about a week assuring me that I would this time experience the fault. Sure e...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick LeSabre Limited 3.8L No Start, Stall, MIL Lamp on VIN: 1G4HR54CXL
Unfortunatley i was unable to fix this vehicle. I took all of your suggestion and tried evrything that you suggested with no avail. We even replaced the computer the maf sensor the crank sensor the control module 3 times, and still had the same result. i appri... Trouble codes: 42 (est bypass fail).
1998 Chevrolet Tahoe 5.7L shift VIN: 3GNEK18R8W
The problem turned out to be the ignition switch, even though the symptoms were a little different than the ones I'd had in the past. Voltage drop to 10v on fuse #20 when the fault was present. Thanks for the help!
1998 Chevrolet Tahoe 5.7L ABS System VIN: 3GNEK18R8W
The problem turned out to be the right front hub assembly. Wear in the bearing was not at all evident until the hub was removed.The way we determined the problem was on the right side was to watch the wheel speed data while rolling VERY slowly...sometimes the ...
1994 Pontiac Grand Prix SE 3.4L power steering VIN: 1G2WJ12X6O
Gave the vehicle a few days of running and it is not as noisey ,still a little loud but the customer said he can live with it.
1997 Pontiac Grand Prix SE 3.8L Misfire, MIL Lamp on VIN: 1G2WJ52KXV
vehicle had a bad exhaust valve, though its weird how this system is able to sneak the misfire by a small engine shake... Trouble codes: P0301, P0300.
2000 Pontiac Grand Prix SE 3.1L MIL Lamp on VIN: 1G2WJ52J3Y
Thanks very much for the three replies but the customer refused repairs at this time . I received some very helpful wiring diagrams . I believe that the new solenoid is defective . If the customer comes back I will post with a real fix . Thanks Mike
2001 Pontiac Montana 3.4L cruise control VIN: 1GMDX03E51
I would like to say thanks to Dennis Ford, Tim [...]. We found that the lower brake light bulbs were out and the element inside the bulb was touching each other. When the headlight automatically came on (it was a cloudy day)due to the sh...
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