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Prev Professional Automotive Repair Technical Discussions for September 5, 2012
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Open Help Requests for GM
Help Request Answers
2005 Buick Rendezvous CXL 3.4L temp. gauge VIN: 3G5DA03E55
temp gauge works fine until it reaches halfway between 1/4 and 1/2 then it stops there until the temp on the scanner reads 220F then the gauge jumps to halfway between 1/2 and 3/4 during this hole time the temp on the scanner is working normally climing to 225...
2004 Cadillac CTS 3.6L no ecm comm VIN: 1G6DM57714
Car will not start. Wont crank. No check engine light. No ecm Comm. Tried programming ecm with update for no start. Also replaced ecm. Replaced tcm. Called GM tac assistance 3 times. Used to start and run when jumping starter relay. Now it doesn't start at all...
2006 Cadillac STS 3.6L Stall VIN: 1G6DW67796
The customer says that this vehicle stalls intermittently at times. It always starts back up and runs fine. Sometimes it happens at a stop and other times it will happen while driving down the road. Hot or cold engine doesn't seem to be a factor. I can never g...
1999 Chevrolet Express 3500 6.5L Instrument cluster VIN: 1GCHG35F9X
This vehicles speedometer bounces all over the gauge and when the speedo reaches 100+ mph the vehicle misfires and feels as if its shutting down, (Fuel related cut out) Checked speed sensors, Ok, 8 months old Checked wiring, Ok Checked and cleaned all grounds ...
2002 Chevrolet S10 4.3L Misfire VIN: 1GCDT19W62
We bought this truck for cheap at a local sale cause the crank was bad in it. I installed a crank and all was good but we have a misfire on cylinders 1 and 4. Not sure if the misfires were there before or not, but I'm thinking not. The new crank did not come w... Trouble codes: P0301 (p0304-), P0304 (p0300-), P0300
2002 GMC Envoy SLE 4.2L Air Conditioning VIN: 1GKDT13S32
When this vehicle came in the first time in March it was not cooling and High pressure was high enough to cut off the compressor. Had a DTC for Fan speed. We replaced the fan clutch and evacuated and recharged the A/C to be sure we had the correct charge. Syst...
2002 Pontiac Bonneville SE 3.8L extended crank VIN: 1G2HX54K12
first time help request. new customer came from many other shops. car runs great all the time, starts great cold. if she lets it sit while in a store or something and comes back out it cranks for a few seconds and starts up.. she says sometimes it will stall a...
2004 Pontiac Grand Prix GT2 3.8L Theft System VIN: 2G2WS54284
This car had an issue with mph not reading correct so i replaced the cluster with a used on . The prob. Was the miles on the new used one was too much more so without starting the car i put the original one back , but when i tried to start it the theft indicat...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue Ultra 3.8L No Start, Stall VIN: 1G4CU5215S
Thanks everyone for all the help Hi check out my powers and grounds Make sure they're all clean. that I found out I had no injector pulse. and fuel pressure was still a bit low even when to decide to fire up. I found those miss the ground for the PCM. replaced...
2002 Buick Century Custom 3.1L no rear turn signals or brake lights VIN: 2G4WS52J82
Thanks for everyones help. When I checked the light sockets in the rear the were hot but the ground was corrodid. Cleaned sockets and lights all work now. Sometimes I seem to overlook the simple things, once again thanks for the help.
2000 Cadillac Escalade 5.7L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1GYEK63R9Y
I forgot to add that compression was in specifications. We removed the PCV valve from the valve cover and covered the valve and valve cover opening with a small piece of paper. There was strong vacuum at the valve cover opening. Spraying carb spray down the di... Trouble codes: P0171 (Lean bank one).
2000 Chevrolet Silverado 1500 4.3L trans inop VIN: 2GCEC19WXY
A big Thank You to all who responded to my request for help. Most of you referred to the input spline dimensions. The two transmissions I received had the smaller input shaft and I was using the larger convertor because the smaller convertor would not bolt...
2003 GMC Envoy SLT 4.2L MIL Lamp on, reduced power mode VIN: 1GKDT13S93
THANKS TO ALL WHO TOOK TIME TO READ AND RESPOND. The computer again failed, loosing the supplied ground for sensors. We were able to determine that it would smoke the ground circuit every time the a/c was turned on. We noticed a broken wire at knock sensor. Af...
2005 GMC C5500 Topkick C5C042 6.6L No Start VIN: 1GDE5C3205
Thank you all for the replies, Some info was quite helpful. This Truck is fixed with 1 injector that was leaking on the high pressure side. The tool we used puts shop air into the injector and watch for a leak, Apparantly 140psi was inadequite to show us the p...
1967 Oldsmobile Cutlass 5.4L Misfire VIN: 338677M180
first off, thank you for all the replies. Thosec of you that said points + condensor, were right on the money. replaced uniset and all is well, just because dwell was right doesn't mean they are good as i found out. thanks again for all the help.
1988 Pontiac Fiero GT 2.8L Timing/Runability VIN: 1G2PG1199J
First off I want to thank everyone who helped me on my first help request... The car is running. The timing was off but I could not figure the right sequence to put it back together right. The timing gear that was on the car when I received it was after market...
2002 Pontiac Grand Am GT 3.4L starter VIN: 1G2NW12E02
Removing the wireing hack the customer performed and replacing the igntion switch fixed the entire problem thank you to everyone for the help
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