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Prev Professional Automotive Repair Technical Discussions for April 29, 2005
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L Twilight Sentinel and Auto headlights VIN: 1G4GD22K6S
Headlamps work in manual mode but not in automatic mode and Twilight Sentinel does not work.The headlight switch on this car grounds various outputs from the Lamp control module.The ambient light sensor changes resistance from around 1000 ohms with a flashligh...
1987 Cadillac Seville 4.1L bcm VIN: 1G6KS5189H
87 seville instrament panel, radio, and some bulbs on the i/p flicker when the doors are shut (key out of ignition. checked powers and grounds, inputs and outputs of bcm. other tech had swapped a central power supply (no help) i put a bcm in it (no help). a ...
1988 Cadillac Eldorado 4.5L Surge, throttle sticks VIN: 1G6EL1158J
I have been trying to locate a problem on a 1988 Cadillac Eldorado for quite a while. While cruising, usually at 40 - 55 mph, throttle will stick and sometimes actually accelerate on its own. Vehicle also sometimes surges at cruising speeds. Both problems are ...
2001 Cadillac DeVille DHS 4.6L class 2 data VIN: 1G6KE57YX1
Please help! Can anyone tell me where I can find a wiring diagram for the class 2 data line on this HIGH end cadi. Or at least a list of all the modules/devices it goes to. This car has been a real nightmare from the beginning. Not only is there several thous...
1993 Chevrolet C3500 Cheyenne 6.5L MIL Lamp on, VIN: 1GDJC34F9P
I need the terminal location for the TPS signal @ the ecm. Alldata has many choices but unfortunatley none are correct. It is a dark blue wire @ the TPS. The computer is behind the glove box.
1996 Chevrolet C1500 Cheyenne 5.0L Cuts out VIN: 2GCEC19MXT
Hi guys, I am the technician working on this vehicle (under Randy's account) This vehicle is being a real challenge...It is a Vortec 305 that runs and drives with normal power but experiences a very brief "cut out" intermittantly. This is not just a 1 or 2 c...
1998 Chevrolet Camaro 3.8L No Start, Stall VIN: 2G1FP22K8W
This vehicle has a no start problem. The problem began as an intermitent problem and now it will not start at all. Replaced the fuel pump and fuel pump relay. The fuel pump gets the pulse voltage with key on engine off sequence. I hot wired the fuel pump to ru...
2000 Chevrolet S10 4.3L 4 wheel drive VIN: 1GCCT19W1Y
vehicle does not shift into 4-hi at all and will only shift into 4-lo sometimes. we strongly suspect the dash switch but don't want to just throw parts at it. anybody exerience this before??? no other symptoms.
2001 Chevrolet Silverado 1500 5.3L can't reprogram pcm VIN: 2GCEC19T11
i have recentley purchase the gm reprograming software from spx otc for the 2004 genysis. after installing the software and reading the directions. i attempted to update current program on this vehicle. during the update an error message no comunication at ste...
1962 Oldsmobile 98 394CID vacuum harness
This is for the heater system on this vehicle. It is a heater only vehicle and what I am needing is a diagram of the vacuum system. All of the vacuum lines are off at the switch and in need of replacement. Any help would be appreciated. My book only go back to...
1997 Oldsmobile Aurora 4.0L oil leaks VIN: 1G3GR62CXV
need help have this engine with some oil leaks need fixed oil pan gasket and lower crank block craddle just above the oil pan .my question is ,is there any way of resealing this craddle without pulling engine and the trans can it be done in the car?has anyone ...
2000 Pontiac Firebird Formula 5.7L oil VIN: 2G2FV22G1Y
This is an informational post only. I will close it immediately. I have a 2000 Firebird in my shop with an oil leak dripping out of the bell housing. After cleaning the entire area and careful inspection, the PCV system was found to not be functioning. The vac...
1997 Saturn SL1 1.9L Stall VIN: 1G87H8283V
Engine Dies At Random,Looses Fuel Injector Pulse. Always Restarts In About 5-10 Minutes.

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52K0V
Thanks to all of you.All of your replies were all I would expect from seasoned mechanics. I will tell you that all of the info and tests had already been performed, including delco regulator. Instead of applying pressure to the rail we used vacume and experien...
1999 Chevrolet Blazer 4.3L Hesitation, very sluggish VIN: 1GNDT13W1X
Sorry for taking so long to get back. The customer finally got the vehicle back in. Now the truck was worse and I checked the throttle position sensor and sweeped it with the snap-on vantage and found a glitch. Replaced the TPS and runs good now. Thank you.
1985 GMC G3500 Vandura 5.7L drivetrain VIN: 2GTGG35M9F
Thanks to all that responded. I'm sorry but I guess the drive shaft was built from scratch when all of this happened, so I took it back to the shop that built it to double check it and it ended up being the center support bearing. I also replaced the front u-j...
2000 Pontiac Bonneville SSEi 3.8L steering coloumn VIN: 1G2HZ5412Y
the fix for this vehicle was to replace the intermediate steering shaft. I would like to take the time to thank robert from penn for giving me the TSB and shaft part #'s. The one thing that upsets me is I'm paying mitchell over 100.00 a month and have their la...
2001 Saturn L300 3.0L MIL Lamp on VIN: 1G8JW52R51
I had gotten 3 replies on this related to checking cam timing witch I did with a scope on cam and crank signals and compared to another vehical from a local car lot that was the same. The costomer had picked up the vehical and was going to leave with us the ne... Trouble codes: P0172 (Fuel trim sys. Rich B1), P0175 (Fuel trim sys. Rich B2).
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