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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 5, 2017
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Open Help Requests for GM
Help Request Answers
1993 Cadillac DeVille 4.9L starting system VIN: 1G6CD53B5P
This one is a head smacker. Car came in as a no start but when I got to it of course it started. Couldn't get it to fail but customer said when it happened there was no clicking sound but still had run power. Someone at her work tapped on starter and then ...
2008 Chevrolet Tahoe LTZ 5.3L Can bus VIN: 1GNFC13048
I'll see if it allows me to add a picture of the wave form. but this vehicle came in with a loss of comm ecm - tcm U0100 & U0101 lost of comm BCM U0140 CAN Buss U2100 scan tool communicates with all modules. so what i did after was hook up my scope t...
2010 Chevrolet Equinox LS 2.4L Engine VIN: 2CNFLCEW3A
Vehicle was towed into us with a no start. Customer stated they were driving down highway and engine just shut off. Upon arrival at our lot we tested compression, found zero in all cylinders. Removed valve cover and found timing chain was very loose, could...
2003 GMC Envoy SLT 4.2L air bag ligh
I have an 03 envoy with a B1001 code in the airbag module that I can clear and will return on the next restart. It appeared after installing and programming this new BCM. SPS told me I may have to let the BCM learn the SDM serial number, if I remember corr...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Chevrolet Corvette 5.7L Misfire VIN: 1G1YY238XM
We found the temperature sensor and knock sensor needed to be replaced. Another shop told us the distributor was the wrong one for the vehicle. It had been installed with a replacement engine control unit and the two were "married" together and therefore the ...
2004 Chevrolet Blazer LS 4.3L air bags VIN: 1GNCS13XX4
Thanks for all the advice it was very helpful I will probably have the org sent in
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