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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 18, 2015
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Open Help Requests for GM
Help Request Answers
1967 Buick Skylark 4.9L valves lifters VIN: 444677H275
Hello all, This old Buick is driving us nuts. The customer that owns the car drove it all last summer with no problems other than a lifter tick. Over the winter he replaced all the lifters, timing chain & sprockets, points & condenser. Since he put all these ...
1997 Buick LeSabre Custom 3.8L Collapse VIN: 1G4HP52K4V
The fuel tank in this Buick will collapse during long drives. We have tried to duplicate the problem with no luck. We have even applied a AC vacuum pump to the tank with a gauge to see if it would collapse. We only managed 8" of vacuum. The problem has happene...
2004 Chevrolet Impala 3.4L No Start VIN: 2G1WF52E94
Car came in on the hook with a no start condition. Cranks good. I have good spark and good fuel pressure. I have no injector pulse. I have no cam position sensor signal. I have RPM signal. I am lost right now.
2004 Chevrolet Trailblazer LS 4.2L No Start VIN: 1GNES16S24
Hello and thanks for viewing this help request. This vehicle is a no start. Customer removed engine from truck and sent it to machine shop for rebuild. He reinstalled rebuilt engine and he states it started up and ran fine for about 30 minutes and then the eng... Trouble codes: P0122 (Tp or app sensor 1 circuit low), P0223 (Tp or app sensor 2 circuit high), P0621 (Generator lamp l circuit problem)
2002 GMC Envoy SLT 4.2L Hesitation, Cuts out VIN: 1GKDF13582
The truck came in some times when you accel. It will hold back holding it there it will take of like a rockett. Coustmer said with cruse set at 70 it runs good. This may not have nuthing but he said it started after getting gas i chaneg the fuel filter & took ...
2009 GMC Sierra 2500 HD SLE 6.0L Safety VIN: 1GDHC44K19
I recently had a 2009 Sierra 2500 come in with the air bag light on. Another shop had replaced the Sensing Diagnostic Module, due to excessive corrosion from the floor mat, with a used module. They installed the wrong number module and it had 6 codes for optio...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Cadillac CTS 3.6L abs module VIN: 1G6DP56755
The fix was to replace the module thanks to the three replies I received
1998 Chevrolet C1500 Cheyenne 5.7L misfire p0301 VIN: 1GCEC19RXW
Since the initial testing didn't allow us to come to a reasonable conclusion, we went back and restarted our diagnosis. The running compression and a second leak-down test (with sound coming from the oil filler neck this time) confirmed that it was a cylinde...
2012 Chevrolet Equinox LT 2.4L Exhaust Actuator VIN: 2GNFLEEK9C
Thank you everyone that replied. Most suggested that it was under a factory warranty due to issues with the timing chains and actuators. The customer opted to call our local dealer and is going to take it there for repairs. I suspected that the actuator had fa...
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