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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 28, 2005
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Open Help Requests for GM
Help Request Answers
1994 Buick Skylark Gran Sport 3.1L No Start VIN: 1G4NM15M9R
hello techys, this one has me stumped. the car came in a the tow truck with a no start. the customer said the car was running great then all of a sudden lost power. and will not start again. at the shop here the car turns over and acts like it wants to start. ...
1982 Cadillac DeVille 4.1L floods VIN: 1G6AD6989C
have checked grounds,egr,replaced ect.scanner will not communicate with car.
1990 Cadillac Allante 4.5L ABS module VIN: 1G6VS3382L
This Allante has no power assist in the brake system, with the ABS and Traction Control lights on. The maxi fuse is good, I do not hear the pump operating to bring up the pressure. Our resources are limited, the Snap-On scanner is no help on this vehicle. Whic...
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W0V
Hi Guys.this ones a pain in the @#!#@. the vehicle came in with a rough run stalling condition,with a very noisy motor.we found that a pisce of carbon had broken free and was stuck under a valve. while we were doing our check we found the usual leaking intake-...
1998 Chevrolet Blazer 4.3L Transfercase VIN: 1GNDT13W8W
Vehicle will not shift into 4hi stopped or moving. Light on 4wd selector switch won't blink unless vehicle is in neutral. Very erratic operation at times. Seems to work ok for a short time when transfercase module(TCM) is unplugged then reconnected. Wondering...
1998 Chevrolet Prizm 1.8L No Start, Cuts out, Stall VIN: 1Y1SK5289W
Hello fellow iATN members. Please help, my head hurts from all the banging on the wall. Car intermittingly stalls, will restart but dies as if running out of fuel. Looses fuel pressure, spark and injector pulse ok. When stalls looses voltage to fuel pump. Seem...
2000 Chevrolet Silverado 1500 5.3L No Start VIN: 2GCEK19TOY
This truck first came in for stalling at stops. There were never any codes stored. Cleaned throttle body and mass air flow sensor and replaced idle air control motor. We used AC Delco parts all through this problem. This took care of this problem. Later truck ...
2000 Chevrolet C3500 5.7L Electronic VIN: 1GCGC33R6Y
we have this 2000 roofing truck that we rebuilt the trans in, high milage and starting to act up the customer said, didn't find much wrong other than normal wear, replaced clutchs and convertor, installed sonnex boost valve and TCC reg valve. The customer drov...
2001 Chevrolet Express 3500 8.1L MIL Lamp on, reduced engine power VIN: 1GCHG39G11
reduced engine power happens any time , sometimes once a day , no patern to problem . all chassis grounds have been cleaned and checked . all wiring between tac mod and throttle body have been inspected and tested with a dmm, all ok. 5 volt reference volt to t... Trouble codes: P1220, P1120, P1515
2001 Chevrolet Astro 4.3L rear brake skid VIN: 1GCDM19W51
The van came in with a complaint of rear brakes trying to lock up on stops or the abs system activating very easily . Upon inspection we found the rear shoes worn to about 90% and drum under spec. We decided to replace shoes,drums and wheel cylinders . We then...
2002 Chevrolet Astro 4.3L abs module
help I just replaced front pads and rotors on this all wheel drive astro van and now the abs light and the red brake warning light are on steady. the customer said the light has been coming on and off occasionally for the last few months, but now its on steady...
1996 GMC Jimmy 4.3L MIL Lamp on VIN: 1GKDT13W7T
Got a real strange one here guys. This engine picks up a missfire on #3 cylinder on DECEL after a hard acceleration. You can't feel it, but the ECM picks it up and you can see it on your scanner, (Tech-2 in my case). We have replaced the #3 injector when we ... Trouble codes: P0303 (missfire 3 cylinder)
1997 Oldsmobile LSS 3.8L Hesitation, Surge, Cuts out, Misfire VIN: 1G3HY52K6V
After the vehicle runs for 45 minutes to an hour,there is a severe bucking and surging between 30 to 40 m.p.h. While watching scan data, there are low misfire counts on cylinders 1,3,5,and 6. Number one is the most common usually showing one to six misfire cou...
1997 Oldsmobile Silhouette 3.4L Cuts out, MIL Lamp on, no power VIN: 1GHDX06E4X
This is odd. Vehicle came in, acted like it started out in 3rd gear and didn't have any power. After driving for approx 10 min, everything seems ok...anyone seen this? Trouble codes: P0108, P1635, P0108
1999 Oldsmobile Cutlass GLS 3.1L Misfire, MIL Lamp on VIN: 1G3NG52J9X
hello guys, i would appreciate some help with this car.we have a misfire only on cyl #1.with scanner connected you can watch the misfire counter go right up.we have tried swapping the plugs ,wires coils, even the injectors with no luck.compression on the cyl. ... Trouble codes: P0300
2000 Pontiac Grand Prix GT 3.8L drl,radio and ac blower motor VIN: 1G2WP12K5Y
prior condition ac blower only worked on high fan. per pinout test replaced resistor and system worked properly for about two weeks. condition now blower inop and at times radio display erratic,and when you turn fan speed above 2nd speed the drl go out and ac ...
2002 Pontiac Montana 3.4L engine performance VIN: 1GMDX03E22
Any help please. Customer complains that vehicle stalls in trafic 2-6mph restarts imediately. Engine also appears to misfire at highway speeds with tcc lockup. Coil packs check out and plug wires show no sign of damage but age is unknown. Fuel pressure, compre...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Chevrolet S10 2.2L No Start VIN: 1GCCS1448W
first let me thank every one for there help.now the fix i found 2 wires burnt going from the computer over the exhaust manifold to the driver side of the truck.it was justluck that i looked at the wires. but they where laying to closeto the exhaust manifold an...
2001 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNDT13W01
Thanx to all of you who offered solutions!!! I did pull the plenum and check the pressure regulator, injectors, and tubes to no avail. There were no leaks there, and I wasn't loosing fuel pressure. I sent the vehicle to the dealer to do a fuel injection cl... Trouble codes: P0172 (Fuel trim system rich-bank 1), P0175 (Fuel trim system rich-bank 2).
2002 Chevrolet Trailblazer LS 4.2L elec windows VIN: 1GNDT13S82
dealer found a 125 amp fuse blown and cured problem-I could not find it myself- thanks guys for all the help. chuck [...]
2004 Chevrolet Silverado 3500 LS 6.6L fuel gauge VIN: 1GBJC34214
most of you say that the sending unit for the gauge is bad we finnally got the truck back in and went we called the dealer they only sell the sending unit with the whole pump assy we are waiting for them to give us the go a head but i am sure this will fix the...
2000 GMC Jimmy Diamond Edition 4.3L four wheel drive VIN: 1GKDT13W2Y
hello all thanks for all your input,long story short was the control module was bad.this car had come in for no 4wd and lights on control switch flashing.somewhere during the coarse of diagnosis the terminals to the encoder/motor were damaged.this created an e...
1998 Oldsmobile Cutlass GLS 3.1L MIL Lamp on VIN: 1G3NG52M3W
Only 3 replies, Two informing me of the harness chaffing problem at the back of the engine. One said he had a similiar problem and replaced the CMP sensor. Customer took car for the weekend and has not brought it back. I called and they said ses light has not ... Trouble codes: P0341.
1995 Pontiac Grand Prix SE 3.1L fan VIN: 1G2WJ52M6S
I found the computer under dash plastic mount out of shape and the clips for verticle holding were spread apart. The thing was flopping around like a blown sidewall at freeway speed. I secured it with some zip ties and also found a chaffed wire in loom behind ...
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