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Prev Professional Automotive Repair Technical Discussions for September 26, 2014
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Open Help Requests for GM
Help Request Answers
2009 Cadillac XLR Platinum 4.6L Smell VIN: 1G6YV36A09
Hi Guys, Hope someone has seen this before. Customer states gas fume smell inside and around the vehicle. Says its worse in garage after sitting overnight and doors closed. Fuel pressure test shows pressure holding at 54 psi key off. No visable leaks on line, ...
1985 Chevrolet Corvette 5.7L No Start, Cuts out, Stall VIN: 1G1YY0781F
Vehicle has been sitting for a couple of years. Has after market Clifford alarm system with remote start. Put new battery in key fob and reset alarm to allow for proper function. Charged the battery on car and vehicle will crank, start, and then shut off immed...
2004 Chevrolet Suburban 1500 LS 5.3L Starting VIN: 3GNFK16Z64
Truck will crank 50% of the time. When it does not crank I have no communication with scanner, no PRNDL indication, no voltage at starter, and no fuel pump prime. U0107a will set at times when it restarts and U1000 was on all modules when first brought in. All...
2004 Chevrolet Express 2500 LS 6.0L No Start VIN: 1GCGG29U14
Customer states the engine stalled while driving and would not restart. Could not communicate with PCM found no power at pin 16 of DLC, found cigar fuse and trailer fuse open replaced both and gained communication.Keep losing communication with PCM can only re... Trouble codes: P1626 (Anti theft system fuel enable), U1041 (Loss of EBCM communications)
2012 Chevrolet Suburban 1500 LT 5.3L Hesitation, Clunk VIN: 1GNSCJE08C
This is a very intermittent problem. Occurs about once a week. The messages "Stabiltrack: On" and "Traction Control: On" appear in the dash and the customer feels a clunk or jerk or something and then the vehicle loses power as if the traction control is kicki... Trouble codes: C0900, 00 (Device voltage too high)
2003 GMC Sierra 1500 SLE 4.3L Mode Door VIN: 1GTEC14X83
Thank you to all who are reading this! I don't know what I'm missing here. all sub systems work great independently ( control head, cable, cable with control head attached, and door mechanism, it is extremely hard to move. When I installed the new control head...

Fixes & Summaries for GM
Fix/Summary Answers
2007 Cadillac SRX 4.6L driver door module VIN: 1GYEE63A87
This vehicle has been repaired. If anyone ever sees a "U1500" code pertaining to the LIN buss, this code could very well be mis-information. The LIN buss recessive or "not talking" state IS 12v. The dominant or "talking" state requires the network to be pulled...
1993 Chevrolet Corvette 5.7L No Start VIN: 1G1YY33P8P
Thanks to everyone for their replies an OEM distributor fixed this car.We carefully checked all injectors,wiring and module before we replaced the distributor
2008 Chevrolet Silverado 3500 HD WT 6.6L Cooling system VIN: 1GCJK336X8
I had a lot of great info on this one. The majority said radiators and head gaskets are very common on the truck. Also makes sense to check for a transmission problem as the problem only comes to light when pulling heavy loads. Unfortunely, the customer hasn't...
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