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Prev Professional Automotive Repair Technical Discussions for May 2, 2013
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Open Help Requests for GM
Help Request Answers
2000 Chevrolet Silverado 1500 4.8L EVAP Leak VIN: 1GCEC14V3Y
This truck has been to several shops and has had everything that could be replaced in the EVAP system. I have done an EVAP system pressure test w/smoke, and a vacuum test. both passed with flying colors. When I do an EVAP service bay test it fails. I have moni...
2004 Chevrolet Silverado 3500 LT 6.6L No Start, Surge, Misfire VIN: 1GCJK33264
Thanks for reading this. I must admit, I am a Powerstroke guy and am limited on Duramax engine systems. This truck was towed in for hard start and low power. A basic scan showed a p0090 code set hard, FRP control, along with glow plug and turbo codes. I am att... Trouble codes: P0045, P0090
2006 Chevrolet HHR LS 2.2L no throttle with engine power reduction VIN: 3GNDA13DX6
brought vehicle in last night after test drive. Complaint vibration at highway speed and brake pulsation when braking with pulling to right side of road. This morning went to start vehicle to do alignment. Engine was running with a dead skip as if misfiring. N...
2006 Chevrolet Malibu LT 2.2L speed sensors VIN: 1G1ZT51F26
Ok guys heres what I know. The car first thing in the morning will shift. Its a little bit harsh but it will shift. When I watch the speed sensor info it shows the output is reading rpm but the input is reading zero. As you drive it the output readings become ...
2006 Chevrolet Impala LT 3.5L Highway steering VIN: 2G1WT58K86
Car was brought in for steering concern on highway. What happens is when you let go of the steering wheel, it begins to weave left to right really slow (stays in your lane the whole time though). Happens randomly. Watched steering wheel while it was doing it a...
2008 Chevrolet Uplander LS 3.9L ps/ac/ps/ac VIN: 1GNDV23158
As soon as the serpentine belt gets wet as in rainy wet roads or in our case wet slushy/snowy roads, the serpentine belt simply stops turning on the crank pulley and needless to say away goes the PS and ALT along with warning lights popping on. We did not see ...
1989 GMC C1500 Sierra 5.0L Poor Idle Quality, Surge, Stall VIN: 1GTDC14H4K
This is a Frankenstien Truck. The owner bought this several years ago thinking he had a potential dream vehical. The motor was replaced with a 5.7 instead of a stock 5.0 For the past several months I have been helping the owner work through problems. The moto...
1999 GMC C3500 Sierra SL 7.4L Poor Idle Quality, Poor Fuel Economy VIN: 1GDKC34J9X
came in with miss and running rough. found a miss fire on #3 installed plugs and wires,still had miss replaced injector.preformed compression test very low on 3 about 90 psi replaced engine test drive did ok cust drove come back skipping on number 5 and 7 we c... Trouble codes: P0141, P1133
1999 GMC Yukon SLT 5.7L No start, no crank VIN: 1GKEK13RXX
Any insight would be appreciated.

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet S10 2.2L #4cylinder VIN: 1GCCS1445V
Well, after much debate, the owner decided not to proceed with repair. They decided to drive it as is and live with the light. Thank you all for taking your time and responding to the post.
1998 Chevrolet C1500 Cheyenne 5.0L Poor Idle Quality, MIL Lamp on VIN: 1GCEC14M4W
I finally got it to set properly! Not exactly positive why so many problems. Lined up balancer mark to timing cover and had someone else crank it while i pushed dist. down. All of a sudden it was at 15 deg. I Backed it up a bit and revved it up and it went... Trouble codes: P1345.
2001 Chevrolet Express 2500 5.0L headlamps VIN: 1GCFG25M01
found daytime running module stuck replaced module all good
2003 Chevrolet Trailblazer LT 4.2L MIL Lamp on
Thanks to all of you guys, found two problems, the purge solenoid wasn't allowing any vaccum to the tank and the filter in the vent valve was filthy, replaced the purge solenoid and cleaned the vent valve and so far so good thanks for all the info Trouble codes: P0440.
2006 Chevrolet Malibu LT 2.2L 1-2 shift VIN: 1G1ZT51F26
Guys Im almost out of options. It get positive gear engagement but it doesnt want to shift.. Now the oss is reading intermittedly and when it does that it almost seems like the trans is slipping but then once it starts reading again it bangs back into gear. Im...
2005 GMC Sierra 2500 HD SLE 6.6L Seat Heater VIN: 1GTHK23225
Sorry for the later response. Problem was in the seat back heater element. When the resistance was chech at first it showed ok. Hooked meter up positioned it up front. As soon as I sat in the seet the meter showed and open circuit. Thanks for the help guys.
2007 Hummer H3 3.7L Wipers VIN: 5GTDN13E07
Found no park signal coming out of yellow wire of wiper motor, which will cause BCM to shut down wipers except for high speed. Replaced 2 motors with A-1 Cardone and both where bad. Installed new motor and fixed.
2000 Oldsmobile Intrigue GLS 3.5L cooling system VIN: 1G3WX52HSY
Finally nailed this one. The trouble was so intermittent that it was difficult to pin down. Even though we had our suspicions. Turned out to be a leaking head gasket. We had place the exhaust probe in the coolant tank with no indication of leakage. We actually...
2002 Saturn L200 2.2L insp monitors VIN: 1G8JU54F92
thanks for all the help what happened was the fuel guage was not reading correctly and would not complete evap monitor once I repaired fuel gauge cat monitords ran and passed inspection
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