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Prev Professional Automotive Repair Technical Discussions for July 18, 2013
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Open Help Requests for GM
Help Request Answers
1997 Chevrolet K2500 Suburban LS 7.4L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1GNGK26J4V
car came in running rough missfier knock senser code lean +125 lt and st both banks. has replaced dist cap mass air at 9.8 at idle under load goes to 75 pulse width at 4.2
2002 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHC23142
Good day, this Duramax has got me a little perplexed. At idle this fuel system is pulling 10" vacuum, at WOT its at 14". So started at changing fuel filter, no change, changed collapsed fuel lines at filter, no change, dropped fuel tank and inspect sender, no ... Trouble codes: P1093, P0101
2003 Chevrolet Silverado 1500 5.3L horn VIN: 1GCEC19T23
intermittien horn operation, can make it work with scan tool, key fob, and somtimes works at horn pad. have traced down all wires to the steering wheel and are good. when holding down horn switch connector the horn will sound every time, so that tells me it is...
2006 Chevrolet Cobalt SS 2.0L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G1AP11P56
This car came into my shop a month ago. customer stated that in had no power and the ck eng light was on on. the customer had cleared the codes before getting the car here. st the time we got the car it was running good with no codes. Now it is a month later a... Trouble codes: P0069, P0121 (TPS sensor 1 perf.), P1101 (Intake air flow system perf), P1182 (Superchager Inlet sensor perf), P0068 (Throttle Body Airflow perf)
2009 Chevrolet Aveo LT 1.6L compressor/expansion valve VIN: KL1TD56EX9
This vehicle came in with a non cooling AC, static pressure is at about 120lbs.With the guages on it it reads 70psi on the low side and 150 psi on the high side at idle or 1500-2000 rpm, the vent temp is warm.It is 90deg today. This car has either a V-5 variab...
2003 GMC Savana 1500 5.3L Instrument cluster VIN: 1GDFH15T03
Thanks in advance for any help on this one. Vehicle came in as a no start. Customer stated instrument cluster gauges and warning lights would fluctuate and come on while driving. Finally vehicle stopped running. After replacing fuel pump and repairing ground i...
2003 GMC Savana 3500 6.0L power lock VIN: 1GTHG39U83
Hello all. I need expert help on this one. This Savana van has an issue with power locks. The unlock works and the lock does not work. Sometimes the locks operate on their own. Using the remote key fob, lock and unlock work. In testing the system, I found that...
2005 GMC Envoy XL Denali 5.3L Assist VIN: 1GKET66M95
Truck came in for harder to steer to the right on the highway. Disconnected tie rods and checked for binding (ok). Checked tire circumference - all within 1/16". Returns slightly faster from the right than left. Steering effort is 5-15% harder to the right. Re...
2005 GMC Sierra 3500 SLT 6.6L Excessive Emissions VIN: 1GTJK33265
Ok we did the head gaskets and all 8 injecters trucks run great it just smoke under load or when pulling it leave a big clould on take off and leaves a light stream untill you let out of the gas or back off to 1/4 throttle i flow tested all my injecter and did... Trouble codes: P1621 (Control module long term memory performance)
2007 GMC Sierra 2500 HD SLT 6.6L No Start, MIL Lamp on VIN: 1GTHK23607
Hello to all, I have this Duramax that has me running in circles. The truck came in with no gauges, flashing A/C light, and no start. If you let it sit for a few minutes it will start, A/C works and the gauges come on line. After about 5 minutes at idle the ga... Trouble codes: U0106, U0101, U0140
2005 Pontiac GTO 6.0L remote locks VIN: 6G2VX12U85
when using the remote to lock doors sometimes drivers side lights come on and stay on until unlock or drains battery. If loud car or bike sets alarm off the lights will come on when nobody is around and drain battery. If remote is not used battery will not dra...

Fixes & Summaries for GM
Fix/Summary Answers
2006 Buick Allure CX 3.8L No Start, Stall VIN: 2G4WF58206
I got this Buick fixed. The problem was the fuse box under the hood. Thanks to everyone that replied but especially Terry [...] who gave me some terrific info that once this car finally acted up again I could figure it out. Thanks Glenn Trouble codes: U1016.
1992 Chevrolet Astro 4.3L No Start VIN: 1GCDM19Z2N
Ok. So this astro is all fixed and runs great. I would have never originally thought the problem was a mechanical issue being as once it started it actually ran quite good. I kinda had it stuck in my head it over fueling or timing. It would crank fine some tim... Trouble codes: 13 (45 -), 45 (41 -), 41 (43 -), 43.
2001 Chevrolet Suburban 1500 5.3L cylinder head VIN: 3GNFK16T41
Kind of mixed opinions on this one. Some say new only. Some say no problems with reman heads. Some say new engine because of mileage. I installed Remans from ATK. The customer actually decided to use new but when we ordered them from GM they were the same piec...
2004 Chevrolet Express 2500 4.8L Flex plate VIN: 1GCGG24V14
Sorry this has taken so long to close, was in a bike accident and was out of action for a while. We found that the T/Q converter was coming part. Replaced with new bushing. Thanks to all. George
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