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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 20, 2005
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Open Help Requests for GM
Help Request Answers
1986 Buick LeSabre Custom 3.0L Stall VIN: 1G4HP69LXG
this is my personal car that started stalling intermitently just as if you turn off the key. sometimes it starts right back up sometimes it has to set a few minutes as if it needs to cool down. it never loses spark or fuel press. i am pretty sure the injectors...
1996 Chevrolet K1500 5.7L Poor Idle Quality, Hesitation, Misfire
hello techs, this truck came in with a simple intake gasket leak. (water) replaced broken gasket started it up and had random missfire codes. and light studder off idle. tried plugs ,wires,cap, rotor. fuel filter. no change. thought maybe gasket moved . remove...
2001 Chevrolet Impala 3.8L Flexplate VIN: 2G1WF55K01
We are at a loss as to what is causing the flexplates to break. These flexplates have 3 windows on one side of the plate, the break is always at the center hole webbing near the center of the flexplate. Have any of you run across anything like this? More impor...
1998 GMC C1500 Sierra SL 4.3L Cuts out VIN: 1GTEC14W9W
Hi guys, 4.3l gmc that has slight chug when light throttle applied, engine speed around 2300 rpm @ 25mph, no codes, timing varies between 11 and 40, tps smooth, cleaned maf and throttle plate, no misfires, egr duty cycle at 50% and actual and desired positions...
2002 GMC Sonoma SL 2.2L Compressor fuse VIN: 1GTCS14532
This truck came in with compressor clutch fuse blown. Customer had taken to previous shop to find why it blows ac fuse. They installed used compressor and looks like they taped wires under air box. First, I notice I can not find diode where alldata says it i...
2000 Oldsmobile Bravada 4.3L transfer case VIN: 1GHDT13W7Y
please help, this 2000 bravada has intermittent service awd light come on for a few seconds while driving,, if stays on for a few seconds, can hear clicking near control module area,, right lower kick panel, scan test show no codes, hard to verify but will com...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick LeSabre Limited 3.8L No Start, Stall, Stalls Then No Start VIN: 1G4HR54C0M
It was the crank sensor, Just want thank everyone who replied
1997 Cadillac DeVille 4.6L Misfire, MIL Lamp on
i pressure tested the cooling system overnight and found coolant in the 2 cyl's i pulled the head and found the head gasket was leaking the car runs great thanks to all who helped it really helped. by the way, those heads are a real pain in the butt to do and ... Trouble codes: P0301, P0303.
1993 Chevrolet K2500 Cheyenne 7.4L No Start, Cuts out VIN: 1GKGK26N3P
Hello guys. I did check all the things you said. To my suprise there was a broken wire (intermittent) betweeen the DIS. wire and the coil. This would cause a change in the MV AC from the DIS & module. Thanks Again HAPPY WRENCHING Trouble codes: 42 (EST Problem).
1994 Chevrolet C2500 Cheyenne 6.5L engine VIN: 2GCFC29S3R
Hello fellow TECHS. I want to first thank the people that took the time and interest in replying to my problem. Unfortunately we did not come up with a fix this time. We checked everything we could think of that might cause such a problem. One of you suggested...
1998 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52MOW
Sorry it took so long to get back here but I wanted to make sure it was fixed. we ran a motorvac on this vehicle and it seemes to have cured the misfire codes. Trouble codes: P0300 (random cylinder misfire), P1381 (cylinder misfire ebcm/ ebtcm).
1998 Chevrolet Malibu 3.1L cyl 4 misfire VIN: 1G1ND52M3W
Thanks to all 22 techs who offered help. This is what they had to say. 1-possible bad plug wire 2-3 mentioned performing a cyl leakage test 3-5 voted for leaking intake. Of those 5, one mentioned an internal vac leak (this was not the case) 4-3 mentioned leaki...
1999 Chevrolet Silverado 1500 5.3L temp gauge/electrical VIN: 1GCEK19T2X
thank you for all your input but we finally had to let this one go. the customer took it in while it was working fine and traded it. thanks again for all your help.
2000 Chevrolet Prizm 1.8L Lack of Power VIN: 1Y1SK524YZ
Replaced fuel pump, strainer & pressure regulator in tank assembly. Problem still existed. Boss took car away from me & put a Mass air flow sensor in. He says it never ran better. Thanks to all who replied. Trouble codes: P0300 (Random Misfire), P0301 (Cyl 1 Misfire), P0302 (Cyl 2 Misfire), P0303 (Cyl 3 Misfire), P0171 (Fuel System Lean).
2000 Chevrolet Venture 3.4L Accessories VIN: 16NDU03E0Y
Thanks to all who replied the problem with this one was the switches in the door. Replaced the switch and everything is working ok now. Thanks again to all who took the time to reply to this.
1998 GMC Safari SLE 4.3L 2nd to 3rd shift VIN: 1GKDM19W8W
Thanks to all the replies that I recieved on my trans problem. The majority said that the transgo shift kit would take care of the problem so I ordered one and will put it in and see if that cures the beast. Thanks again for all the replies.
1999 Saturn SC2 1.9L Hesitation, Surge VIN: 1G8ZR1274X
Found the problem in the fuel pump. Wave form showed good but pump was intermitently dropping pressure. Replaced pump assembly and no further problems. Thanks to all who replied.
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