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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 2, 2006
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Open Help Requests for GM
Help Request Answers
2003 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEK19U03
This truck misses heavy on cyl#3 and #4. we have scoped the ignition and coils and injectors, all look normal. we swapped 2 plugs, wires, injectors(not plugged at all). To no avail i can not find out what is causing this miss at idle. It runs perfect on the hi... Trouble codes: P0300
1994 GMC K2500 Sierra SL 5.7L front brake pads VIN: 2GTFK29K4R
Hi GM guys,this is embarassing to ask for help on what seems to be a basic system, Hell, I do hardcore GM driveability stuff, and a low brake pedal seems elementary, but help me anyway... This truck has a low brake pedal. Very soft too. I know it is the front...
1998 GMC C2500 Sierra SL 6.5L MIL Lamp on VIN: 1GTFC24S4W
Hello Techs, Intermittent DTC P1191 (Intake Air Duct Leak), P0101 (MAF Sensor Performance), P0400 (EGR System Performance) stored in PCM memory. Inspected intake air ducting, no problem detected. We have resealed upper and lower intake manifold gaskets along w... Trouble codes: P1191 (Intake Air Duct Leak), DTC, P0101 (Mass Air Flow MAF Sensor Performance), DTC, P0400 (Exhaust Gas Recirculation EGR System Performance)

Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac Seville STS 4.6L MIL Lamp on VIN: 1G6KY5292P
I thank you for the few replies I received and John [...] for offering me some good Info. on wiring that I could get from him and I will keep that offer open because even though I put in another new crank sensor and the engine started I am not quite sure it i... Trouble codes: 083.
1997 Cadillac DeVille d'Elegance 4.6L twilight sentinal, interior lights VIN: 1G6KE52Y5V
Everything tends to indicate the PZM is at fault. All switches and relays operate properly through the 'overrides tests' and the timer module and twilight delay work. One thing the customer did not mention was that there was a battery drain all the time. I not...
1992 Chevrolet Corvette 5.7L Excessive Emissions VIN: 1G1YY23P2N
Thanks to the nine fellas who offered help. John from Illinois and Bill from Missouri nailed it. The fuel tank is leaking externally. I smoked the evap system and found the smoke was reaching the top of the left muffler which is being sucked up by the state st...
1994 GMC C2500 Suburban 6.5L Misfire, MIL Lamp on VIN: 1GKGC26F4R
Thanks for all the replies. The fix ended up being the injection pump. We installed an exchange rebuilt unit from an authorized Stanadyne dealer(although now brand new ones can be had for not much nore). Also using a Tech 2 would of been much more benefical as... Trouble codes: 36.
2002 Pontiac Bonneville SE 3.8L Transmission code P1811C VIN: 1G2HX54K42
Thanks to everyone who offered advice... I replaced the pressure control solenoid, oil and filter. Trans. shifts great MIL light has not returned...I think it's fixed!!! Thanks to all!!!
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