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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 30, 2011
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2001 Buick Century Custom 3.1L MIL Lamp on VIN: 1G4WE52J21
P0446 present. Used Versus on vent and purge circuits. ok. Has new cap, filler neck and vent valve. checked for restrictions in vent lines. Smoked system for leaks. Trouble codes: P0446 (Evap vent solenoid)
2009 Cadillac CTS Premium 3.6L U0073 Fail safe VIN: 1G6DR57VX9
This car is from the local GM dealer, they have around 10-15 of them with the same fault, they imported around 120 of them new but because they are a GM Holden dealer and not Cadillac they do not have a Cadillac “dealer number" so GM won’t support them to help... Trouble codes: U0073 (High speed Can off)
2006 Chevrolet Uplander LT 3.5L MIL Lamp on VIN: 1GNDV33L36
hey guys this vehicle came in chugging and bucking sometimes and the mil on with code po171 in tech look it over found an erratic mass air flow sensor input,5.23 volts at idle 580 to 600 rpms,sometimes it would come down to where it needed to be 3.56 to ... Trouble codes: P0171

Fixes & Summaries for GM
Fix/Summary Answers
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