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Prev Professional Automotive Repair Technical Discussions for February 12, 2005
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Open Help Requests for GM
Help Request Answers
1991 Chevrolet Astro 4.3L Stall, idle increase, knock VIN: 1GN87HGZ2M
Hi folks, got one that has me stumped. 1991 astro, 4.3. Van came into shop with high idle comlpaint. Upon first inspection found that the TB was covered in carbon deposits, that the idle air passege was badly coked, EGR and PCV passeges pluged up. We also foun...
1999 Chevrolet Venture 3.4L traction control VIN: 1GNDX03E8X
Vehicle runs and drives great but the TCS switch does not illuminate. Low traction light on dash works when you burn off the tires but the TCS light on dash never lights except for bulb test. All Data is not helpful on this system. Can anyone point me in the r...
2001 Chevrolet S10 4.3L ABS Fault VIN: 1GCS19W718
We rebuilt this long block w/ no troubles. Vehicle then had a problem with the ABS Light Triggering a C0237 (Erratic wheel speed). The vehicle's speedo also jumps around when the engine is revved. Viewing with the scantool while revving, the scanner reveals th...
1994 Pontiac Grand Prix SE 3.4L MIL Lamp on VIN: 1G2WJ12X6R
Trying to make the peices of this puzzle fit. Customer states these 2 symtoms appeared on the same day. 1)Intermittant MIL (1640) WARM engine only. Poor driveability COLD (cts below 40f) engine only. These symtoms don't happen at the same time. Start cold, poo... Trouble codes: 1640 (quad driver a)
1997 Pontiac Grand Am SE 3.1L Poor Idle Quality VIN: M6VC710466
help gm techs the idle runs normal for a while and then idle starts to go up, tps sensor code comes on and replaced sensor, found no help, found the air flow sensor not reading on scanner, will this cause po121 code? tried an other scanner and the same thing, ... Trouble codes: P0121
2000 Pontiac Grand Am GT 3.4L gauges,heater,DRL,windows VIN: 1G2NW52E4Y
Hello fellow techs. Just wondering if anyone has seen this before. My sisters car will sometimes have no gauges, pwr windows, hvac, Drl, or warning lights[ this is just what I have noticed there may be other systems effected]. Also the service vehicle soon lig...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Century Custom 3.1L Cooling Systems VIN: 2G4WS52MOX
Hi All, Apparently these 3.1 liters have a problem with the intake gasket leaking. It is a plastic gasket and it will crack and cause a leak from the lower intake. Many said that the new GM gasket it a revised design and won't leak like the origional.I also ne...
1997 Chevrolet Corvette 5.7L instrument panel message VIN: 1G1YY22G0V
Thanks to Douglas from CA who suggested to check TAC module, Steven from Delaware who even offered his phone # and Mark from Maryland who advised to check for proper modules and programming. I checked PCM,BCM, EBCM, TAC-all original, with all of them disconnec...
2000 Chevrolet Silverado 1500 5.3L coolant in the oil VIN: 1GCEK19T8Y
Thanks to all that replied on my coolant in the oil problem. It turned out to be a head gasket on the passanger side. It had a very fine crack in the gasket at the front corner water passage, letting coolant to cross over and enter the area where the lifters a...
1996 Pontiac Grand Prix 3.1L Door locks & window motors VIN: 1G2WJ12M7F
Sorry for the long wait. Got busy and forgot to reply. We did a lot of testing on this car and finally found a bad ground. The head of the bolt holding G305 ground point to the floor of the car at the base of the right 'B' pillar had snapped off. We took pictu...
2001 Pontiac Montana 3.4L Accessories VIN: 1GMDX03E51
thanks to the seven replies . I checked the floor pan connector behind the drivers seat for corrosion but it was clean & dry . I took the dealers suggestion & added a bottle of gm#[...] fuel injector cleaner first and the fuel gauge is working properly now ...
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