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Prev Professional Automotive Repair Technical Discussions for January 23, 2010
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L engine light VIN: 3G5CAO3E12
Vehicle came to our shop with a engine light on codes were both upstream and downstream o2 sensor slow responce. after testing heaters and powers and grounds installed new (aftermarket sensors) o2 sensors and cleared the codes. Customer brings vehicle back ne...
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2000 Chevrolet Blazer LS 4.3L Dash panel VIN: 1GNDT13W4Y
This blazer came in yesterday. When I turn the key to the run position the only thing that lights up in the "service engine soon" light. If I turn the headlight switch on the odometer,abs,seat belt,shift idicator light all light up like they should when I tunr...
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2001 Chevrolet Silverado 2500 HD 6.0L 6.0L, 4L80E, 4x4 VIN: 1GCHK29U61
Hello GM Tech's, I'm merely looking for some assistance for a complete engine, transmission, wiring, ECU's, swap. I know it's been done before & I'm just looking for accurate information. I would like to swap out the tired 6.0 for a 2004.5-2008 6.6 Duramax & ...
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2004 Chevrolet Aveo 1.6L Hesitation, Surge, Misfire, MIL Lamp on VIN: KL1TD62674
Call me a fool but i have read everything on Iatn about this condition and i had the intake and exhuast valves resurfaced! After many trips to a hole in the wall machine shop i decided to take it to another machine shop that told me the valves stem height was ... Trouble codes: P0300, P0700, P1781
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2006 GMC Sierra 1500 WT 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on, Very Rich VIN: 3GTEC14X06
Runs rough,poor idle, smells rich, cta gets hot, exhaust does not seem restricted. MAF code is hard and MAP code intermittent. Tried 2 MAFs and MAP. No change Trouble codes: P0101
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Fixes & Summaries for GM
Fix/Summary Answers
2006 Buick Rendezvous CXL 3.5L Stall, Hard Start VIN: 3G5DA03L36
Thank you for all who responded, The problem ended up being a gummed up throttle body, i wiped it out with top engine cleaner and a rag and the vehicle now idles up on start up like it should.
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1990 Chevrolet Camaro Iroc-Z 5.7L Excessive Emissions VIN: 1G1FP2389L
THANK YOU FOR ALL THE REPLIES, EGR PASSAGE IS PARTIALLY CLOGGED UP. CLEAN PASSAGE WITH THE OEM EGR VALVE FIX THE PROBLEM. EMISSION NICE AND CLEAN NOW. AGAIN, THANK YOU EVERYONE.
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1997 Chevrolet C1500 5.0L Misfire VIN: 2GCEC19M4V
It was the lower intake manifold gaskets. They were brittle and falling apart. It's the plastic impregnated with rubber style. I've replaced these because of coolant leaks but never because of an internal vacuum leak. After doing the gaskets the miss went ... Trouble codes: P0300 (Misfire detected).
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2001 Chevrolet Silverado 2500 HD 6.0L 1-2 shift VIN: 1GCHK29U61
Thank you for the input regarding this transmission concern. I have agreed with all the help I have received & feel there's no other alternatives but to completely rebuild this trans. Unfortunately with the economy the way it is, the rebuild will have to wait,...
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2002 Chevrolet Suburban 1500 LT 5.3L odor VIN: 3GNFK16Z92
WELL THIS ONE IS NOT FIXED. MY INITIAL SUMMERY MENTIONS MOST OF THE SUGGESTIONS HAVE BEEN PERFORMED AND CHECKED. IN ADDITION TO THE ITEMS ALREADY PERFORMED I VERIFIRED THE VENT VALVE DOES OPEN AND REPLACE THE PARCIALLY SATURATED CANISTER (WHICH I ASSUMED WOULD...
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2005 Chevrolet Silverado 2500 HD 6.6L Misfire, MIL Lamp on VIN: 1GBHC23285
This is fixed after replacing harness from inj. to ficm, still had problem intermittently. So i replaced wiring from ficm to pcm. Trouble codes: P1244.
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