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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 7, 2023
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
2007 Buick Rendezvous CXL 3.5L MIL Lamp on VIN: 3G5DA03L77
Vehicle has DTC P0446 (EVAP Vent Performance). Verified the wiring is good. I can not get the ECM to apply the ground for the vent valve. ECM is new and has the latest calibration, which is specifically for this DTC (p0446). ACDelco TDS help desk is unable... Trouble codes: P0446 (EVAP Vent System Performance)
2015 Buick Enclave Leather 3.6L Hesitation, Misfire VIN: 5GAKRBKD9F
I thought this would be a quick fix . Test drive resutted in a misfire going uphill . Replaced spark plugs w/ AC Delco premium plugs and a misfire accumulation on # 2 cylinder. Went back and installed a new coil on # 2 cylinder. Drove the vehicle and got a...

Fixes & Summaries for GM
Fix/Summary Answers
2012 Chevrolet Silverado 1500 LT 5.3L Poor Idle Quality, Cuts out, MIL Lamp on VIN: 1GCRKSE76C
Many good replies, the fix was a new PCM. Local dealer had in stock. Program and throttle body relearn and all set. I could not do a throttle body relearn before because the old PCM could not control the throttle body. Looks like this vehicle had multiple issu... Trouble codes: P1516 (Throttle body performance), P2101 (Throttle body performance), U0073 (Can bus high).
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