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Prev Professional Automotive Repair Technical Discussions for May 19, 2012
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Open Help Requests for GM
Help Request Answers
2005 Cadillac SRX 4.6L No Start VIN: 1GYEE63AX5
car came in guy wanted the plugs replaced, replaced plugs and now car wont start. fuel system seems to be disabled. hook scan tool up and found fuel system open. need help thank you
2006 GMC Sierra 1500 SLE 5.3L No Start VIN: 2GTEC19Z96
This truck came in from another shop with the right head off. They had found a bad lifter and cam lobe.They didnt want to do the job so I took it on.I pulled the engine and changed the parts.The truck would not start (had spark,noid,fuel pressure and no codes)... Trouble codes: P0342, P0343
2008 GMC Acadia SLT 3.6L Air Bag Light VIN: 1GKEV237X8
Hi All, have this Acadia with the service air bag display and light on. Doing a scan shows code U0151. Communication with Restraints Control Module and Vehicle Communication Interface Module. This vehicle also had a problem with wanting to restart when turning...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Chevrolet Lumina APV 3.1L Poor Idle Quality, Hesitation, Surge VIN: 1GNCU06D3L
Thanks to all for response, Gary, Bryan and David were correct. Excessive a/c ripple / wave. Tested and replaced many components. Also found bulletin 92-47-8a indicating possible defective insolation diode. Does not specify were diode in located. Due to age an...
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