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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 21, 2006
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Open Help Requests for GM
Help Request Answers
1990 Buick Century Limited 3.3L Excessive Emissions VIN: 1G4AL51N6L
Hi guys, this baby won't pass emission test. It appears ok on scan tool. Block learn stays around 113-118 integrater will go as high as 140 under load. No codes. All readings appear normal, but co at cruise is 206, way out of range. I have looked for extra fue...
1997 Buick Century Limited 3.1L Rear Brake Lights VIN: 2G4WY52M9V
This vechicl has 3rd brake light only and no other brake lights. There is ABS Code C1273 VES Circuit Open or Shorted to Ground. If any suggestion to this problem it would be a great deal of help. Electrical is not my strongest point. Also do anyone know what a...
1991 Chevrolet Caprice Classic 5.0L Stero Amp VIN: 1G1BN53ESM
This is for one of the Techs at our shop. The stereo makes a loud high pitch buzzing sound thourgh the front speakers with stero on. We think is the Delco Bose Amp in the trunk. We can't seem to find a wiring schematic for the amp. Mitchel has only partial wir...
2000 Chevrolet Astro 4.3L Excessive Emissions, MIL Lamp on VIN: 1GCDM19W8Y
Did a complete tune-up about 3 mths ago. The code was there at that time. Cust did not want to presue. Now they had a drive clean test with a fail and want to fix. We're thinking a worn timing chain but don't want to tear apart before your input. Thanks in a... Trouble codes: P1345 (Crank shaft correlation problem)
2003 Chevrolet Silverado 3500 6.6L Engine VIN: 1GCJK3318F
I am posting this for a buddy having problems at the dealer. He just bought this 03 1ton dually from a GM dealer with 54,000 KM, extended warranty, Allison AT the works. His complaint is when the truck is just warm, not hot, and he's accelerating it will sudde...
1998 GMC Jimmy Envoy 4.3L gauges,door locks,wipers,radio,heater,4x4,high bea VIN: 1GKDT13W8W
replaced ignition switch again didnt cure problem,fuses and relays checked

Fixes & Summaries for GM
Fix/Summary Answers
1999 Chevrolet Tracker 2.0L acuator VIN: 2CNBJ18C9X
Well this one is all done. The problem wound up being the acuator inside the diff. The diaphgram was ripped a little. This caused the pump to run on and off as it was trying to build pressure. Removeing the diff from the vehicle was pretty straight forward. To...
2001 Chevrolet Astro 4.3L fuel gauge, VIN: 1G1DM19W71
The ignition switch was indeed causing the transmission codes as known to most of my replies, I really appreciate all the help. I did also check the power and grounds as suggested. The fuel gauge has not been a problem since the repairs. I will replace the fue...
2001 Chevrolet Prizm 1.8L engine VIN: 1Y1SK52831
Sorry it took so long to respond. We tried a few of the suggestions. First we changed oil and filter used mobile one. This did not help. Second pulled valve cover off to check baffle, it was ok. Customer drove car in town the first few days, no oil consumption...
2002 Chevrolet Silverado 1500 5.3L Hesitation, Cuts out VIN: 2GCEK19T82
Thanks to all those who responded to my cry for help. The fix was a new PCM. We had to send this one to the dealer and they put a PCM in it. There was an intermittent open circuit in the PCM. After trying to fix this for three days with no clear diagnosis we... Trouble codes: P0172, P0175 (Fuel trim bank 2 rich), P0706, C0237 (Rear Wheel speel signal erratic).
1992 Oldsmobile Cutlass Supreme S 3.1L Stall VIN: 1G3WH54T3N
this vehicle was one of the strangest cars i,ve ever worked on i rebuilt the circuit for spark timing finally came to the conclusion that the timing is off or the relucter ring has moved on the crank shaft the car does not advance but only [...] on timing t...
1998 Pontiac Grand Prix GT 3.8L headlights VIN: 1G2WP52K9W
Well this car is fixed! Paul & Carl hit the nail on the head, the ignition switch had a bad contact in it. This is aparently a common thing, but we couldn't find any posts on it. The way we figured it out was that after talking to the customer again they just ...
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