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Prev Professional Automotive Repair Technical Discussions for August 13, 2014
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Open Help Requests for GM
Help Request Answers
1999 Buick Park Avenue 3.8L compressor VIN: 1G4CW52K8X
hello techs. i just put an ac compressor and acumulator orifice tube in this car the old compresor was leaking,but still with one pound of fre-on in the compressor,it wont come on and the security light is on ,and the traction light,air bag light ,...
1991 Chevrolet V1500 Suburban Scottsdale 5.7L steering pump VIN: 1GNEV16K3M
This is a TV station vehicle on a 1/2 ton chassis and has a satellite system on it. It is severely weighted down. The power steering pump was leaking when it first came in. We have replace the pump and gear box 2 times within 50 miles of each other. When we ...
2000 Chevrolet Astro 4.3L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 1GCDL19W2Y
This van idles great and revs up in the shop just fine, but driving down the road after warm it is worse and under a load bucks and looses power. Fuel pressure is good and doe's not drop, we replaced Mass air flow sensor and the P0102 code says mass air flow s... Trouble codes: P0102 (Mass air flow low)
2007 Chevrolet Cobalt SS 2.0L engine VIN: 1G1AP11P27
hi guy was looking for some help.i have this 2007 cobalt ss (super charged) that keeps setting a code p2135(reduced engine power).the customer bought the car and had it for 4 days when it started doing all had already a used throttle body installed,it ...
2007 Chevrolet Express 2500 4.8L shift VIN: 1GCGG25V87
Van came in with reverse gone and slips in drive. We tore down tranny and direct clutches were smoked. we replaced all the bushings and installed new boost valve. we checked valve body for cracks and found none. We also checked the two problem check balls in v...
2008 Chevrolet Suburban 2500 LT 6.0L MIL Lamp on, limp mode VIN: 3GNGK26K98
Thanks in advance for any help with this. I'm this posting for my Technician and can supply additional information if requested. This vehicle is one of our News trucks that we service and there is no prior history regarding this problem. This vehicle was towed... Trouble codes: P0700 (Transmission control Module), U0121 (lost communication with abs system), P0575 (cruse control switch signal circuit), U0102 (lost communication with Transfer case control module), U0100 (lost communication with ECM/PCM), U0140 (Lost communication with Body Control System Erratic)
2009 Chevrolet Express 3500 LS 6.0L Poor Idle Quality, Hesitation VIN: 1GAHG35K49
Hello fellow techs, The van in question has a rough idle and while driving under light acceleration there is a hesitation and it throws a p0106 code. There are no misfire codes but every once in a while you can feel a slight misfire. This car had a MAP sensor... Trouble codes: P0106
2006 GMC Sierra 1500 WT 5.3L engine VIN: 2GTEK19B56
initial problem fans come on with engine off kill battery charged battery start engine cut ac on shuts down engine in 10 seconds Freon amount good compressor not locked up engine will run with ac on but with belt off

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CX 3.4L temp guage VIN: 3G5DA03E22
Thank you for all of your help. I was able to check another car out with the same engine. As most of you said, this vehicle is operating as designed. The low speed cooling fans come on at 224 degrees and the high speed fans come on at 230 deg. This is norm...
1996 Chevrolet C2500 Suburban 6.5L Dome Lamp VIN: 1GNGK26F7T
Thank you for the help. I found the problem. Sorry I don't have the circuit number, but I found conflicting diagrams in both Alldata and MOD and the vehicle itself, and did not want to put out incorrect information. So I worked back from the lamp with my fox...
2008 Chevrolet Uplander LT 3.9L Electronic VIN: 1GNDV33138
sent to dealer and had them check it out and they said they ran recalibration ON THE HVAC that fixed the problem.
2003 Hummer H2 6.0L Brake Pedal VIN: 5GRGN23U23
The customer has been driving this vehicle for a few weeks now without any change in the feel of the brake pedal. The customer is willing to return the vehicle, but that won't happen for another month or so when he has time to leave it for a while. When he r...
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