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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 25, 2014
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Open Help Requests for GM
Help Request Answers
1998 Buick Riviera 3.8L Misfire VIN: 1G4GD2210W
This car is a headache. 3 Years this customer has been complaining of an intermittent misfire. It rarely presents itself during it's extended stay in our care, and as Murhpy's law would have it, only when the scope/scanner has sat idle long enough to turn off.... Trouble codes: P0341 (History code for Cam Sensor)
1993 Chevrolet K2500 Suburban 7.4L Stall VIN: 1GBGK26N8P
Gentlemen, I have a difficult one in the shop, been here for a month. 93 big block. Working on it every time I have a chance. Was brought here in the typical way, customer had fiddled with it and replaced several sensors, and finally brought it to me for the ...
1998 Oldsmobile Silhouette Premiere 3.4L Coolant sensor VIN: 1GHDX03E8W
Customer came in complaining of low coolant light coming on. Found classic intake gasket leak. Customer did not have the funds to replace at the time. Fast forward a couple of months and customer decides to have it repaired. Change gaskets and install new ther...
2002 Oldsmobile Alero GL 3.4L Stall VIN: 1G3NL52E92
Thanks for reading, my question is GM Passlock system would make engine stall out at anytime hot or cold? After stall try restart, it 's no crank, ( jump starter direct crank and spark at plug wire) cycle key couple time always start again on its own. As mine ... Trouble codes: P1626 (Anti Theft system)
2000 Saturn SL1 1.9L all shifts VIN: 1G8ZH5283Y
working through this information the test drive revealed the problem was injector driver in ecm and had guy come by and flash ecm and solve problem - ok - engine run smooth on four and all was well a BUT then gears shifted hard and p1371 set - did proscribed t...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Chevrolet Tahoe LS 5.7L brake pedal VIN: 1GNEC13RXW
Thanks for all the replies and help, there were lots of them. The ones that made the most sense were about air being trapped in the ABS unit. My AutoEnginuity Scan Tool would not activate ABS on this Tahoe so I drove it and stomped the brakes several times on ...
1999 Chevrolet C1500 Suburban 5.7L Crank Relearn VIN: 3GNEC16R9X
The problem was a faulty brake switch with 6 wires. The brake switch signal to VCM was stuck at 12 volt even when brake pedal is applied. I simply cut the wire (terminal 10, C4) to fool the VCM and performed the crank relearn successfully.
2005 Chevrolet Trailblazer LS 4.2L Stall, MIL Lamp on VIN: 1GNDS13S45
removed intake and valve cover. Found the new chain tensior not fully engaged. Replace tensior and truck running great. Thanks for all the info. Trouble codes: P0017 (Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor B).
2007 GMC Acadia SLT 3.6L trans VIN: 1GKEV23707
TCM AND PCM were both programmed and the vehicle shifts nicely. Thanks for all the help!!!
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