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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 24, 2008
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Open Help Requests for GM
Help Request Answers
2004 Buick Regal LS 3.8L All lights VIN: 2G4WB52KX4
Customer complaint is all lights go off at night while driving. First attempt was headlight switch, disassembled and cleaned all contact points and reassembled switch. Customer drove for several weeks and happened again. This time we run car four hours with li...
1978 Chevrolet Corvette 5.7L Ignition VIN: 1Z8748S433
I got this 1978 corvette sting ray in the shop with a no start issue. They have a aftermarket 350 ram jet engine with an aftermarket wiring kit installed. It will start for a min, than cut out and unable to restart. I ran a few test and found no spark coming o...
1984 Chevrolet Corvette 5.7L Horns VIN: 1G1AY0785E
Vehicle alarm sounds all on its own. Horns chirp. It doesn't matter whether the car is running or sitting still. And when it activates there is no deactivating it. It either kills the battery or you disconnect the battery. I have been told there where lots of ...
1999 Chevrolet Malibu 2.4L Engine Oil VIN: 1G1ND52T2X
Hi all. About a month ago the engine had an occasional banging noise (belt,water pump side), upon a very cold start-up (-30 celcius). I checked the oil and it looked contaminated with coolant. Two oil changes and two weeks later it is still happening. My testi...
2000 Chevrolet C3500 6.5L No Start, Cuts out, Stall, MIL Lamp on VIN: 1GBKC34F6Y
I can really use some help on this one guys. Vehicle came in 2 days prior during a snow storm and is a plow truck. Customer complained of intermittent stalling/crank- no start. Found nearly out of fuel. Filled with fuel and replaced fuel filter and it drove f... Trouble codes: P0231 (Lift pump secondary circuit low voltage)
2001 GMC Sierra 1500 SL 5.3L Radiator VIN: 2GTEC19T41
I am posting this truck hopefully to help other techs. I did a search on this data base and found nothing related to this repair but found the fix in napafix. The first thing we noticed was the lower hose was ice cold and the upper hose was warm, the temp gaug...
2002 GMC Savana 3500 6.5L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Misfire VIN: 1GDJG31F72
I work on very few of these so I am not well versed on how GM controls these. I cannot get this pump to time correctly. When it came in the offset was +.09 and under timing enable procedure the DES and ACT were both 0. I adjusted the pump toward the drivers ... Trouble codes: P0238 (Boost sensor circuit)
1999 Oldsmobile Bravada 4.3L rear axle? VIN: IGHDT13W9W
Hello everyone and Merry Chistmas! I have tis vehicle here for a vibration in the driveline, It is most pronounced at 52 to 55 MPH. I have narrowed it down to the rear of the vehicle by having one of my techs ride on the floor in the back while i drove it down...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Century Custom 3.1L Misfire VIN: 2G4WS52J12
Sorry I'm so late reporting the progress of this car. as of yet we have not been able to find a fix for the car. we preformed all the suggestions you gave us. We believe at this point it might be a bad injector or a sticking valve, but the customer decided to ... Trouble codes: P1811.
1998 Chevrolet C3500 Cheyenne 5.7L Misfire, MIL Lamp on VIN: 1GBGC34R2W
first of all i would like to say thank you for yuor help. we end up replacing the fuel pump. what i noticed on the scanner (otc geneysis) under gm mode LTFT was +6 in generic mode +14. dont know why the difference. test drove with propane installed and misfire... Trouble codes: 300 (multiple misfire).
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDS13S82
Hey to all you wise men Took the valve cover off and put a 1 inch wrench on the exhaust cam and could not get any degree of movement out of the advance unit that is made as a part of the exhaust cam gear SO I with a little work it broke loose so we called th... Trouble codes: P0014 (cam phase sensor).
1998 Oldsmobile 88 Royale 3.8L wheel speed sensor VIN: 1G3HN52K0W
Thanks for replies. After further testing of harness and sensor got sensor to malfunction on hoist with erratic pattern. Replaced hub again. No further problems from it. Found the manufacturer to be BCA the last 2 hubs. Went OE this time, and added the BCA hub...
1994 Pontiac Grand Prix SE 3.1L heat VIN: 1G2WJ12M6R
thanks to everyone who responded. turns out after further testing that cylinder head gasket was breached replaced both cylinder headgaskets after we had the cylinder heads cleaned and check for cracks. engine has heat.
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