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Prev Professional Automotive Repair Technical Discussions for January 2, 2013
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Open Help Requests for GM
Help Request Answers
1995 Chevrolet K1500 5.7L Excessive Emissions VIN: 2GCEK19K3S
This truck came into the shop not running very good and needing state inspection. Upon visual inspection i found the passenger side injector leaking. Replaced injector and resealed throttle body as well as installing a new diaphram in the regulator. After gett...
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2002 Chevrolet Tahoe LS 4.8L 3-4 Shift VIN: 1GCGK13V92
Hi i have this customer that has a problem with trans that does not shift to fourth until truck is warm. He had this problem at the end of last winter but problem wasn't there all the time, it worked good all summer now its -7 in Toronto he said it does it aga...
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2003 Chevrolet Silverado 2500 HD 6.6L warning indicators VIN: 1GCHK23163
Both abs and red brake lights come on in this truck intermittently when first started along with service brake system warning in dash coming on. We installed a used abs module on this vehicle in the past as customer didn't want to spring for a new one. The cod...
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2006 GMC Sierra 1500 SLT 5.3L Low-side pressure service port VIN: 1GTEK19T46
OK, so I appologize in advance for posting what may be a dumbass request, but, here is the question: Where the heck is the low-side service port on this thing? The high-side is located just before the orifice tube and the dealer-supplied diagram of this system...
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2004 Saturn Vue 2.2L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 5GZCZ43D54
i check all power and grounds and also replace throttle body. i am leaning toward ecm or map but ecm is a 400.00 dollar gamnle i was wonder if any of you fellow tech have any suggest thanks for your help Trouble codes: P0068
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Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Skylark Custom 3.1L MIL Lamp on VIN: 1G4NJ52MXW
Thank you everybody for your responses. Most people pointed out the the purge valve was a common problem. Paul hit the nail on the head. The vacuum lines on the purge solinoid were indeed switched. I switched the lines and had my brother inlaw drive the car... Trouble codes: P1441.
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1990 Chevrolet Camaro RS 3.1L Excessive Emissions, Hesitation, Stall VIN: 1G1FP23T2L
Thanks for all the help guys. I flushed the injectors , replaced the thermostat because of low temp & added sea foam to the gas tank, problem solved. Again , thank you all! Bill
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2002 Chevrolet Trailblazer LT 4.2L No Start VIN: 1GND513S92
ALRIGHT WENT BACK TO THE BASICS. WHEN TRUCK IS NO A NO START AND NO CRANK PULLED STAR CONNECTOR AND TRUCK STARTS UP RIGHT AWAY. TRACED TO BLUE WITH WHITE TRACER TO REAR STAR CONNECTOR UNPLUGED AND REPLUGED IN FRONT CONNECTOR TRUCK STARTS. JUMPED BLUE WITH WHIT...
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2004 Chevrolet Express 2500 4.8L Misfire
The van has been gone for 2 days & no more blinking ses light. Thank you all for responding all were considered. Dan & Bill both suggested crank relearn, This was the problem. thanks again for your time. Trouble codes: P0300, P0122, P0174.
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2005 Chevrolet Venture Plus 3.4L No Start VIN: 1GNDV03E65
The biggest problem with this van is intermittant. We replaced the ignition switch and cylinder. All of the componants of the security system are new. Brought to the dealer to reflash bcm and ecm. Will be fine for two to three weeks and it is like somethin...
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2003 GMC Envoy SLT 4.2L reduced engine power VIN: 1GKDT13S13
I talked to the customer this evening: he stated it was in fact fixed. Replacing the APP sensor (accelerator pedal assembly) seems to have done the trick. Thanks especially to Wayne for pointing out the 5V ref issue in the freeze frame data as in the sum of th... Trouble codes: P1271.
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2000 Pontiac Grand Prix GT 3.8L Poor Idle Quality, Surge, Misfire VIN: 1G2WP52K8Y
Thanks to all that responed, We removed and tested egr operation (good) We removed and throughly inspected upper intake plenum, (no problems) Check'd all things mentioned by the responses and could not pinpoint this issue before the owner decided to end the ... Trouble codes: P0300 (Random missfire).
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