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Prev Professional Automotive Repair Technical Discussions for November 13, 2010
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Open Help Requests for GM
Help Request Answers
2003 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y63
Ok please help before all my hair is gone. This car came in with a transmission code and wouldnot clear emissions. we found it to be a bad seal in the trans so we pulled it rebuilt it and sent the customer on there way. They came back the next day with the cur... Trouble codes: P0446 (Evap emissions vent control circuit), P446
2002 Chevrolet Trailblazer LT 4.2L Air Bag VIN: 1GNET16SX2
Air Bag light came on after A/C compressor and water pump repair. Pulling my hair out on this one!! The light was not on before it entered my shop and customer says it has never been on. The scanner will not communicate with Air bag module. Have a U1000 code i...
1997 GMC C3500 Sierra SLT 6.5L Crank-No-Start VIN: 1GTHC33F2V
Initially, engine would stall after driving but would immediately restart. Being a manual, engine continued or carry rpm when stalled because manual transmission. Engine would refire, stall, refire and may take off fine for a while. Except for stalling, engine...
2001 Pontiac Bonneville SE 3.8L monitors VIN: 1G2HZ54181
Hello and help This pontiac will not run two monitors , o2 and evap. Both o2 have been changed, by customer ,recheck for correct o2s (denso)ok. check power and grounds both good. check resistance 7.5 ohms and 7.6 ohms. check amp draw both same at approx...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Cadillac DeVille 4.5L Excessive Emissions VIN: 1G6CD5338L
after 2 weeks this one is done.thank you for all replies.juan you nailed it.after installing a resonator, co @ .02,15mph nox @ 366 and at 25mph nox @ 74.engine runs good.this cady has been a good "teacher" for the way, this cady does not have air injecti...
2005 Cadillac STS 4.6L MIL Lamp on VIN: 1G6DC67A75
thanks for all the help smoked tested again found some small leaks in back of intake reset fuel trims and drove for a week no lite Trouble codes: P0171, P0174.
2005 Pontiac Vibe 1.8L rear end VIN: 5Y25M63865
vehicle was under warranty GM is replacing this rear differentials ! Gm realizes they have a problem with these rear diffs. and they are replacing them without question. They are replacing the complete unit and not rebuilding my guess is the new part will be u...
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