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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 16, 2005
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Open Help Requests for GM
Help Request Answers
1988 Chevrolet C3500 Cheyenne 5.7L Hesitation, Stall, MIL Lamp on VIN: 2GCGC39K7J
this truck came in with a lean symptoms, I hooked the scanner and sure enough I had an o2 sensor lean code, but the sensor was replaced and it responds to a rich condition, so I diagnosed the problem as not enough fuel, I dropped the fuel tank and replaced the... Trouble codes: 44 (o2 sensor lean)
1991 Chevrolet Beretta GT 3.1L Hesitation, Stall, MIL Lamp on VIN: 1G1LW13T1M
Good think I shaved most of my hair off already.. LOL This car will start every time. Sometimes it will run perfectly. Then the check engine light will come on for the tps and map sensor. The lose thier 5V reference. These are two seperate feed from the compu... Trouble codes: 22 (tps sensor), 33 (map sensor)
1994 Chevrolet Astro CL 4.3L suspension VIN: 1GNDM19Z3R
I have a 94 Astro Van that has a vibration over 63 mph ... and gets worse as speed increases ... nothing we have done has seemed to touch this vibration ... the angle of the drive shaft appears to be ok ... nothing drastic ... the vobration seems to lessen if ...
1997 Chevrolet S10 2.2L Hesitation, Cuts out, Stall, interm ext crank VIN: 1GCCS1448V
In gear lightly accel @ .80 -1.00 TPS voltage. Short term fuel trim suddenly goes to 0% & O2 sensor goes below 10mv , then usually stalls or runs rough for several seconds. Already tried new ECM, 4 new fuel injectors, & O2 sensor, & fuel pressure regulator.
1998 Chevrolet K1500 Cheyenne 5.7L passlock tds
Hi Everyone, Have a 98' chevy k1500 p/u in the shop that was towed in as a no start. Security light was flashing when i tried to crank it over.The engine would start and then die immediatly. I hooked the mastertech scanner up and saw no I.P.W. during cranking...
1999 Chevrolet Lumina 3.1L Hesitation, Surge, MIL Lamp on VIN: 2G1WL52MXX
Hello all, This 99 lumina has what feel like a missfire periodically, but alwaws on a cruise, and usually when there is a slight load (incline). The scanner does not pick up any missfires, it does set the P0336 code ocasionally, I dont unerstand how because i... Trouble codes: P0336 (24X reference signal)
2000 Chevrolet C2500 5.7L Cooling Systems VIN: 1GCEC19T21
hello everyone I have this 2000 chevy pickup with a 5.3 not a 5.7 like the iatn states it is. The truck came in with overheat problem, we tested the cooling systym with the chemical and it showed a blowed head gasket. We replased head gaskets and had heads tes...
2000 Chevrolet Tracker 2.0L No Start VIN: 2CNBE13C7Y
After a hot soak this vehicle does not start the first try usually on the 3rd try, I have to hot soak just the right amount of time 5-10 minutes to reproduce the problem. The problem cannot be reproduced any other way, and the vehicle runs perfectly otherwise....
2000 GMC Yukon XL 1500 SLE 5.3L extended crank time VIN: 3GKFK16T1Y
2002 Oldsmobile Alero GL 3.4L map light on rearview mirror and dome light VIN: 1254589785
From what I understand there is a timer somewhere that operates these lights that is supposed to shut them off after 10 seconds of the door being shut?
1997 Pontiac Grand Prix SE 3.8L MIL Lamp on VIN: 1G2WJ52K9V
Hello again everyone. I have this gran prix in the shop with a check engine light on and also the srs air bag lamp is on. I checked it for codes using my snap-on scanner and found code P0441 evap concern no purge flow? I looked every where on this car and can ... Trouble codes: P0441, B1015 (no description)

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac DeVille 4.6L Transmission removial VIN: 1G6KD54Y7X
This one comes out the bottom. It's not that hard but it takes quite some time and considerable attention to detail. The pitfall for us was two engine wiring harness connectors that WERE NOT mutually exclusive. They are near each other and it's easy to reverse...
1995 Chevrolet Blazer 4.3L brake warning light VIN: 1GNCS13W8S
this truck is down the road, thanks for the many replies most of you wanted to know if the master cylinder was full and that was the first thing that i had check. you also wanted to know if the amber light was on and it was not on or i would have said so it wa...
1997 Chevrolet Cavalier 2.4L turn signals VIN: T5VE106622
Found a ground wire not hooked up underneath washer bottle.Body shop probably culprit.Than You for all your help and suggestions.It was appreciated. Patty
1999 Chevrolet Cavalier LS 2.4L fuel system, electrical VIN: 1G1JF52T7X
thanks to those who replied on the cavalier. your suggestions were correct. the coded ignition key and switch were the problem. troy [...] auto service plano, tx
1999 Chevrolet K1500 Suburban 5.7L tcc pwm code 1860 VIN: 3GNFK16R2X
This truck was just finished yesterday. The fix consisted of replacing the PCM under the hood. As it turns out (with some further insight from Identifix) Pin seven which controls that circuit ground to apply/release TCC was indeed applying it BUT NOT releasing...
2000 Chevrolet Venture 3.4L harsh shifting VIN: 1GNDU03E1Y
Thanks to all who replied. I did not fix this vehicle. Everyone thought the dealer was charging too much for the rebuild and most felt that it did not need a rebuild. I feel also that it is an electric or sensor problem. The problem is very intermintent, which...
1997 Oldsmobile Cutlass Supreme SL 3.1L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3WH52M4V
My wife asked me once about my hair falling out cars like this is why.Was able to find shop with scope. He was more than willing to help. He took a good look at electrical side of injectors did not see anything strange.He also said that napa injectors can and ... Trouble codes: P0300.
1999 Oldsmobile Silhouette Premiere 3.4L engine VIN: 1GHDX03E3X
Thanks to everyone that replied The problem was the valve springs . they were to weak to push the lifter back against the valve preload and keeping the valve open Thanks again
2001 Pontiac Firebird Formula 5.7L headlamp motor VIN: 2G2FV22G71
I can't post a real 'fix' for this problem, as the customer hasn't returned for the diagnosis to continue. Some of the suggestions I received from the group were corrosion at the headlight control module, aftermarket wiring from a security or keyless entry sys...
2001 Pontiac Aztek 3.4L Misfire VIN: 3G7DA03E21
After testing all of the sensors, grounds,fuel pressure, drivers and ecm, I narrowed it down to a fuel problem. I finally pulled the fuel module out of the tank and found that the guage sender had melted and dropped into the tank this kept getting softer and e... Trouble codes: P0300 (Multiple cylinder misfire).
2002 Pontiac Grand Am SE 3.4L security light flashing VIN: 1G2NF52E72
vehicle started before diagnostics were completed. customer took the car and to this date problem has not returned. hate it when it happens this way! thanks to everyone who took the time to respond. I expect we will see it back in a month.
2002 Pontiac Grand Prix SE 3.1L Cuts out, Misfire VIN: 1G2WK52J22
This car is fixed! It's a wonder what could happen with a little information. Jay hit on it with ignition module. Most stated plugged or restricted exhaust. (never had restricted exhaust effect driveabilty at the exact same rpm every time). I was able to locat...
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