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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 22, 2004
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L blower VIN: 1G4GD221XS
hello everyone i need help custumer came in with blower motor on with igntion turn off and key out blower motor still blowing only way shut blower off is to pull fuse from fuse box that is under rear seat the 2 fuse that say blower motor in fuse box under dash...
2002 Buick Century Custom 3.1L Unknown VIN: 2G4WS52J52
Customer says that one time only, transmission stuck in reverse, no matter where the shift selector was, except in park. While this happening, the TRAC OFF light was lit. After a while of trying to get the car to go forward, the TRAC OFF light went out and the...
1995 Cadillac DeVille 4.9L lifters VIN: 1G6KD52B3S
Hello Caddy techs Customer is in my area from vegas. Customer said oil light came on at idle.But above idle no Light.Just for The heck Of it I looked in valve cover thru the oil Cap just To see If oil was pumping to the top and there was nothing.The engine d...
2000 Cadillac DeVille DTS 4.6L abs module VIN: 1G6KF5791Y
hello group i have a 2000 caddy that came in with a code c1214, system relay or coil ckt open and code 1248 ebcm turned on red brake warning lamp. i replaced the ebcm due to the relay being integral with the unit. i have access to limited diagnostic info for t...
1993 Chevrolet Astro CL 4.3L Hesitation, Cuts out VIN: 1GNEL19W6P
Vehicle seems to idle fine and engine runs good, the only problem is when in acceleration above 45 mph, engine boggs down. We have attempted several differant options to no winning. Any help would be greatly appreciated.
1996 Chevrolet Cavalier 2.2L theft system VIN: 1G1JC1241T
Vehicle was towed in, starts and dies. evidence of someone tinkering with wiring under dash and ignition wiring- cut, taped soldered, etc. Vehicle starts and dies within a couple of seconds, sounds good during that short time. Retrieved one code- PO1601-commun...
1997 Chevrolet Tahoe LS 5.7L No Start VIN: 1GNEC13R8V
hey friends, a fellow was towed in to our shop from out of town, no start situation, no fuel pressure, checked out to be a bad fuel pump. was told by owner it was just replaced recently. pulled down tank, replaced pump with factory part, the hard plastic lines...
1999 Chevrolet Venture 3.4L oil filter gasket blown off from oil pressure VIN: 1GNDX03E9X
i have a chevy venture van that was towed in last week because it wouldnt move when put in gear. i replaced the transmission. customer picked up the vehicle yesterday. customer brought vehicle back today because the engine started knocking. found the oil filte...
2000 Chevrolet C2500 5.7L Won't run Monitors VIN: 1GCGC24R4Y
I have 10 of these trucks that need to passs California state smog inspection and are failing. They will not pass the OBD II rediness test showing 4 monitors not run. The unrun monitors are Fuel System, Componets check, O2 heater and O2 sensor. All ten trucks ...
2001 Chevrolet Cavalier Z24 2.4L Idles Too High VIN: 3G1JF12T81
Hello fellow techs! This vehicle came in the shop a couple of weeks ago with a high idle. According to the SnapOn scanner, desired idle when hot is 900. Instead it likes to idle at about 1300-1400. The crazy thing is that the IAC counts remain at 40-50. If I g...
1999 GMC Yukon Denali 5.7L abs VIN: 1GKEK13R1X
Hi and thanks for checking this one out! Our customer complaint is abs activates under light braking always below 10mph. Monitoring wheel speed sensors with snap-on scanner shows good readings. We used the movie function and the abs goes active with equivilant...
2001 GMC Yukon Denali 6.0L side mirror VIN: 1GKEK63UX1
Good Morning all: 2001 Denali, Drivers side rearveiw mirror. All images have a Double Image almost ghost like. Vehicle has an Electronic Chromatic Glass option. I need to know if any G.M. Tech has seen this issue and what is G.M.'s (or their's) Rememdy. Thank ...
1994 Oldsmobile Achieva S 2.3L Hesitation, Stall VIN: 1G3NL1535R
When taking off from stop when first started cold, this car will accel for maybe 60 feet (6-8 seconds) and then loose power and if you keep foot in it, it will die. Once car is past this stage it runs fine until it sits again. We have monitored fuel pressure d...
2000 Saturn LS1 2.2L Misfire, MIL Lamp on VIN: 1G8JU52F2Y
Hi guys. Hope all is well in IATN world. This car will run OK for several days then start to miss once in a while and the check engine light will come on but not necessarily in that order. Plugs were original and worn so we replaced them with the proper ACDELC... Trouble codes: P0300, P0420, P1599

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Electra Park Avenue 3.8L prolonged crank VIN: 1G4CW54C4K
We have updated the prom chip in the computer and replaced the idle air control valve - the plunger / spring was broken - this seemed to solve the problem Thanks for all your help - Brad
1994 Buick LeSabre Custom 3.8L no start VIN: 1G4HP52LOR
Well guys it's finally fixed. Thanks to all your help it wasn't that hard. I recieved 12 replies to my help request, most of you thought that the lock cylinder wires were the problem {not what was wrong with this one}. However between steve from Cal., Scott fr...
1988 Chevrolet V30 Silverado 6.2L Excessive Emissions, No Start, Cuts out VIN: 1GCHV33JXJ
To add to the still unresolved problem, now when its hot ,shut it down anh will not turn over, dash lights go out its a no power situation, there are a couple of lights in the dash that glow dimly,ala a dead short some where but we cant seem to find it
1994 Chevrolet Camaro Z28 5.7L Poor Idle Quality, Surge VIN: 2GIFP22PXR
the trouble was the distributor, after removing the assembly you could spin the shaft and hear bearing noises, and it was very rough and bumpy when rotating the shaft, the new oe distributor was very smooth when rotating the shaft by hand, installed the new un...
1996 Chevrolet S10 2.2L volt meter VIN: 1GCCS1449T
Thanks to all who replied. Why does it seem the easiest fixes are the hardest to find. When the the engine rev's or or torqued it wiggeled the light sensor connector. I add a couple of inches of wire and replaced the end. Presto!
1998 Chevrolet Cavalier LS 2.4L Cuts out, Stall, THEFT SYSTEM VIN: 3G1JF52T4W
thanks for taking a look at this on, here goes. turns out the sun shines on every dogs butt atleast once. it was circuit 480 pcm power, it was repaired once befor. someone used the gm butt conectors, but they used an uninsulated terminal crimper. it was just g... Trouble codes: P1629 (theft enabled), Z21 (loss of uart from pcm to ipc).
2002 Chevrolet Malibu 3.1L door locks VIN: 1G1ND52J52
Thanks to Carl [...]
1991 GMC K2500 Sierra SLE 6.2L Unknown VIN: 1GTGK24J8M
had 2 replies about 4x4 actuator. we did replace actuator and drive truck with it unplugged, even drove with driveshaft removed - clunk was still there. 1 reply about rear brake shoes wearing grove in backing plate - ok but way out of adjustment.rear diff. was...
1996 GMC Sonoma SL 2.2L Compressor VIN: 1GTC51443T
Confirmed by a lot of you, it has a weak compressor. The black stuff on the orifice is from the teflon rings inside the compressor. This seems to be a fairly common failure on S10's, usually caused by a bad fan clutch. The customer declined further repair at t...
1987 Pontiac Safari 5.0L Eating ingition modu VIN: 1G2BL81Y4H
First of all I wood like too say this is the first time I'v used the tech. help and I'm very inpresed with the professional advice sent back!! All replies right on the mark.Car runs goooooood yes the check engine light is on and timing is at base timing,but cu...
1989 Pontiac Firebird 5.0L Poor Idle Quality, Surge, Misfire VIN: 1235467F9K
Thanks to all that replied. This car was sitting for about two weeks it was not rush.After check it again,I start having a steady MIL and no comunication with the scaner,also no code 12 with jumper wire at A&B terminals.After doing a trouble chart diagnostic f...
1990 Pontiac Grand Am LE 2.3L Poor Fuel Economy VIN: IG2NE1102L
Hi guys and girls,well I'm pretty sure I found the trouble with the quad 4 on my pulling tractor.1-I replaced the fuel lines(3/8 and 5/16 instead of 5/16 and 1/4)and also change the pump and while doing so I replaced the lines in the tank unit ond bingo there ...
1993 Pontiac Grand Am SE 3.3L No Start VIN: 1G2NE14N7P
Thank you to everybody who took the time to help, there were many of you. After taking a few steps back and getting back to basics. We went back over the whole harness looking for any missed grounds since we didn't have power to the dlc. We found two grounds t...
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