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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 5, 2007
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1989 Buick Riviera T-Type 3.8L brakes VIN: IG4EZ11C8K
Cust had brought the car to us twice complaining of brakes "dragging". Each time we could not duplicate any symptoms. On the first visit we noticed brake lines "weeping" at the rear brake proportioning valve. We replaced the valve and associated lines. A few ...
1991 Buick Regal Gran Sport 3.8L brake pedal VIN: 2G4WD54L3M
the brake pedal on this car will feel good as you come to a stop but will drop about a quarter to half inch suddenly as you stop. will sometimes fade at a stop and the car will creap a little then grab again but only does that once no matter how long you are s...
1995 Buick Riviera 3.8L No Start VIN: 1G4GD22145
scan data- tech 2 not running- rpm 20/ egr pintle 100% 5 volts- diconnecct 0 /tps coolant and iac sensors read o or -40 f at times- loose data at times- back probed ecm on tps haves normal readings- egr normal- iac normal-lab scoped fuel control signal normal ... Trouble codes: P0171 (fuel trim lean), P0325 (knock failure), P0401 (egr flow test failure)
2002 Buick Park Avenue 3.8L Alarm VIN: 1G4CW54K82
The customers complaint is that the alarm goes off when opening the door after unlocking the car with the key fob. It did this 3 times yesterday when they stopped in, but of course isn't acting up today now that the vehicle is here to get checked out. Somethin...
1990 Chevrolet Blazer Scottsdale 5.7L No Start, MIL Lamp on VIN: 1GNEV18K71
started out truck would start then stall several times in the morning. once running it would run all day. Now it is worse it just starts then stalls. it has a replacement distributor and new fuel pump relay. I have a good idea what it is but want some chevy gu...
1996 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1249T
good day all this car came in no start, would run 5 min then stumble and stall. restart after 10 min then repeat. found pcm coil drivers shutting down. replaced pcm, car ran perfect for 2 hours. went to deliver and no start. no spark until you let off the key....
1997 Chevrolet Cavalier 2.2L Daytime running lamps VIN: 1G1JC1245V
This vechicle is equipt with daytime running lamps but they are inop and there is a warning lamp flashing in the dash. I am completely unfamiliar with this system in GM vehicles.
1999 Chevrolet K2500 7.4L Poor Idle Quality, Misfire VIN: 1GCGK29J0X
came in for engine miss at idle warm or cold. monitor misfire data-cylinders 1 & 8 continual misfire at idle. gradually/intermittently cyls 2, 4, & 7 will begin to misfire after idles for 3 or more minutes. miss clears above 1200 rpm. no codes stored. cleane...
1999 Chevrolet K1500 Suburban 5.7L MIL Lamp on VIN: 1GNFK16R1X
hi guys i have car came in with dtc po160. costomer installed all new [...].clear code test drive same code came back. bank2 sensor2 stay at 0.450mv. ohme test wire from sensor to vcm found ppl wire rubbing trans bracket and cut. repair wire still ho2s at ... Trouble codes: P0160
2002 Oldsmobile Bravada 4.2L rear differetial VIN: 1GHDT13S62
this vehcile makes a ticking sound at about 30 mph in sweeping left turn,brakes are new and rotors are new,no excessive movement in axle bearing and seal is not leaking.i will tell you about another issue and that is at low speeds (under 10 mph)it feels like i...
1972 Pontiac gto 455CID front clip VIN: 242877P100
i am seeking one or all parts to replace the front end assembly for a 1972, or a 1971 gto or lemans with the endura nose- rubber bumper. any help or info to locate any parts or a parts car would be greatly apreciated. thanks, dale.
1988 Pontiac Firebird Trans Am 5.7L Stall VIN: 1G2FW2186J
Vehicle was towed in as a no start. Lost all power except aftermarket alarm and courtesy lights. Had check battery connections ok, pulled on harnesses under hood. I removed the cover under the dash and all power returned. Have tried pulling on wires under dash...
1992 Pontiac Firebird 5.0L NO Start VIN: 1G2FS23EXN
After completion of repair to steering column and reassemble of steering column vehicle will not start. Checked resistance of pellets in key. Resistance is 1150 ohms. This should be within range for a 1130 ohm resistor. After reading all the past fixes with th...
1993 Pontiac Grand Prix LE 3.1L compressor VIN: 1G2WH54T2P
Hi everyone I have a fun one,I hope some one can help me. I have no compressor clutch ingagment I have tested power & grounds all good tested pressure switch a/c & p.s. all inputs to e.c.m. good. a/c is comanding on but no clutch. I can turn clutch on with sca...
2000 Pontiac Grand Prix GT 3.8L Cuts out, Stall VIN: 1G2WP12K5Y
stalls every few weeks while moving --normally over 20 mph- will restart and drive a few more weeks - IM thinking just to install crank sensor but with todays cars hate to just throw parts at it --thanks joe
2000 Pontiac Grand Prix GTP 3.8L Unknown VIN: 1G2WR5211Y
All help is apppreciated. Automatic HVAC right side is 48 degrees & left side is 65 degrees; fan speed 3 & recirculation on. Freon level is 2.25lbs as described in TSB. The outside temp shows 52 degrees when 1st started then 126 degrees 98% of time there after...
2001 Pontiac Aztek 3.4L BCM, locks, guages VIN: 3G7DA03E41
New to this type of vehicle I ask for help, and I thank you all who will reply. The customer complains of locks and fuel & temp guages that go inop once and a while. They continue to do this until he unhooks the battery, and then it will be fine again for a fe...
2003 Pontiac Aztek 3.4L Stall, Misfire, MIL Lamp on VIN: 3G7DB03EX3
Thanks to everyone for looking at this request. The wrecker brought this vehicle in with a dead battery. The battery was recharged and the vehicle started and seemed to run ok at idle. We check charging voltage and sometimes it would be at 13.5 volts and then ... Trouble codes: U1040 (Loss of class 2 communicationthis code was in the IPC), U1016 (Loss of class 2 communicationsthis code was in the BCM), U1016 (Loss of class 2 communicationsthis code was in the BCM)

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CX 3.4L Ignition VIN: 3G5DA03E22
Thank you to all that replied. Michael [...] did drill out the center with took me about 5 minutes this morning, replaced the cylinder and all works great.
2003 Buick Rendezvous CX 3.4L MIL Lamp on VIN: 3G5DAO3E13
thanks for your help. I found that the connection at the canister would leak with smoke when i twisted on line. thanks again for your help. Also i asked the question about the smoke did not come out gas cap with off. The reason for this is because the fill nec... Trouble codes: P0440.
1996 Cadillac DeVille 4.6L No Start VIN: 1G6KD52Y5T
Thank you iATN members for all your help, after a good nights sleep and a whole lot of man hours, problem was due to mixed up sensor wire orientation. Thanks again for all your help and support.
1991 Chevrolet Lumina 3.1L No Start, Poor Idle Quality VIN: 2GIWL54T8M
to the 24 elite people who said bad injector i say only this YOU WERE RIGHT!!! !!! i changed out the number 6 injector and the car ran like a top thats after i ohmed out the suspect injector and it showed 0 ohms i looked at the injector harness to make sure ...
1998 Chevrolet Prizm 1.8L dlr module VIN: 1Y1SK5281W
I would like to thank all who read my post and especially those who responded. I learned a valuable lesson on this one. I unfortunately burned one more module in the process of repairing this vehicle. I learned that you cannot always trust only OHM readings wh...
1999 Chevrolet K1500 Suburban 5.7L Belt VIN: 3GNFK16R5X
Thank's for all the help. I had not posted a reply yet because I wanted to make sure the problem stayed fixed. I believe everything is good now. I installed a GM belt and also a new crank pulley. It's been about a week and a half now and all seems well. Thanks...
1999 Chevrolet K1500 Suburban 5.7L Misfire VIN: 1GBFK16RXX
Thanks to everyones help. After numerous times calling the customer to bring the truck back in, he did and i tested for vacuum at dipstick tube and it was pulling a vacuum. customer about had a heart attack when i told him three hundred dollars to repair intak... Trouble codes: P0304.
2003 Chevrolet Suburban 1500 LT 5.3L high idle VIN: 1GNFK16Z23
Thanks to all for taking the time to give me your input. In the end I replaced the intake. I did however, epoxy(JBweld) the intake as a temporary repair. This was a case of you touched it, you bought it. I know everyone has been there a time or two, if you hav...
1992 GMC C3500 Sierra 6.2L Cuts out VIN: 1GDGC34J2N
well after checking out the truck some more found that the injector pump was bad put new pump on all is good thank to all for your help...
2001 GMC Sierra 1500 HD SLE 6.0L drivetrain VIN: 2GTEK69U31
i've drained the transfer case again and refilled with autotrak fluid, and it is still doing the same thing , so i guess it needs rebuilt. thanks for all the replies
1966 Pontiac GTO 396CID Heater VIN: 242176K122
Customer has decided to hold off on the heater core for now since I am doing other work to the vehicle. Replies ranged from removal of the inner fender, loosening enough to reach the fasteners, to drilling holes to get at the fasteners. Thanks, Bob
2001 Pontiac Grand Am GT 3.4L blower resister VIN: 1G2NW52E31
Thanks for all the replies,thhe car did not come back yet.Many replies said to replace the motor ,we already did that and we used all AC Delco parts. I think the next thing we will try is sealing the cowl as suggested by a couple of repies ,there is a T S B on...
2002 Saturn L200 2.2L MIL Lamp on VIN: 1G8JU54F32
The fix was BCM replacement and programming.Tom & David were right on,Thank You.The only problem was the Saturn Dealer.They would not program the correct mileage stating that they did not know how long vehicle was driven with the faulty BCM as the odometer was... Trouble codes: U1064 (bcm data line lost).
2003 Saturn L200 2.2L Starting VIN: 1G8JU54F83
Thanks to those who replied without having anybody control module codes and installing the pass lock key ignition module and performing the pass lock key learn procedure. The car still continued to act up. I recommended to the customer to take the car to the S...
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