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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 10, 2007
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1997 Buick Park Avenue 3.8L Mechanical VIN: 1G4CW52K7V
After replacement the engin won't start, and backfires. The compression test are between 140-150 PSI. The fuel pressure is within spec. removed timing cover and the timing chain marks are aligned. Removed Oxygen sensor and cranked with same result
1994 Cadillac Seville SLS 4.6L Rear Auto Level Control, Trunk Pulldown Motor Sche VIN: 1G6KS52Y8R
Greetings IATN Folks, Thanks for taking the time to look at how you can help. I'm dealing with this 13 year old car that was traded in and the new owner desires that features are made functional. My Mitchell and Chiltons vehicle data does not include schematic...
1997 Cadillac DeVille d'Elegance 4.6L none VIN: 1G6KE54Y2V
help please, ipc displays theift system, car may not start. tech 2 scan ipc code b2781 test res chip in key. and wiring to cyl lock.good. check res to ipc reads same as key chip.car starts and runs.any help appicated
1998 Cadillac Catera 3.0L No Start VIN: WO6VR52R1W
Hello tech's. I have one here that makes no sense to me, I need some help. This caddy has been sitting a couple of years. And will not start. I ran the regular no start test vehicle has spark no fuel, I then replaced the fuel pump. Now I have 80 psi at the fue...
1993 Chevrolet C1500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 2GCEC19K8P
Vehicle Running lean good fuel pressure. extremely load buzzing noise coming from injector housing. appears to be coming out of the housing not the injectors themselves. vehicle backfires after warmed up and no power, replaced fuel filter. the buzz noise is ex...
1998 Chevrolet Astro 4.3L No Start VIN: 1GCDM19W9W
2000 Chevrolet Silverado 1500 5.3L Mechanical VIN: 1GCEK14W9Y
Just a simple question for everyone. I know larger tire sizes affect stopping distance. I have a customer who stated that a tire shop told him he would have to have his speedo recalibrated to decrease his stopping distance. I don't believe reprogramming the vs...
2001 Chevrolet Blazer LS 4.3L unlock w/key VIN: 1GNCS13W01
When unlocking the vehicle with the key(no remote available), the alarm will go off when the door is opened. After opening the door and turning the ignition on, the horn quits and the vehicle will start normally. If you try to immediately duplicate the problem...
2002 Chevrolet Impala LS 3.8L Starting VIN: 2G1WH55K42
No Crank. Starter Is OK. Starter Relay Not Getting Grounded By PCM. Communication Ok With All Modules But BCM. BCM Fuse Blown. Whenever C1 Plug Is Attached To BCM, Fuse Will Blow. All Other Module Communication Still OK. I Left C2&C3 Connected To BCM & Made So...
1997 GMC Yukon SLE 5.7L prndl VIN: 1GKEK13R9V
We had installed a trans in this turck and now the customer states that some of the PRNDL lights are inop, it will light up in park, 2nd and 1st, it is out in rev, nuetral, 4th and 3rd. We had replaced the nuetral safety switch when we did the trans and are no...
2002 GMC Sierra 1500 SL 4.3L airbag light VIN: 1GTEC19W92
i need some help on this one. truck came in due to driving down road and headlight went out and security light came on at the same time. after checking out came up with the bcm. replaced bcm with new unit. could not get bcm to reprogram. ordered and reinstalle...
1994 Oldsmobile 88 Royale 3.8L MIL Lamp on VIN: 1G3HN52L7R
Car came in a few weeks ago, and one of the other guys at the shop got it first. He replaced plugs, wires, and the cam and crank sensors. When it did not fix the problem, he reinstalled the old crank sensor. He then asked for help when the car still had a code... Trouble codes: 341 (Cam / Crank error in history only)
1995 Oldsmobile Cutlass Ciera 3.1L radio VIN: 1G3AJ55M2S
can the automatic door locks be disabled and still have power locks working. i dont have the owners manual and all data doesnt show owners manual info. also the radio fuse blows as soon as you turn the knob to turn on the unit. is it time to throw away the ra...
1996 Pontiac Grand Am GT 3.1L slip VIN: 1G2NW52M9T
Thanks in advance everyone. This Grand Am was given to me about a year ago because motor was bad. I installed a used motor a few days ago. When the cradle was on the ground the trans. leaked out alot of fluid. After installing motor, we added about 6 quarts of...
1998 Pontiac Sunfire SE 2.2L engine VIN: 1G2A45E734
hey guys heres another one from a different shop asking for my help cylinder 1 misfires only on take off compression at 150 change all tune up and coils checked fuel pressure and changes inj while working on it noticed tstat was stuck closed replaced and start...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac DeVille 4.9L ip VIN: 1G6KD52B3R
alot of common answers back to reality. the vats module is located in the trunk compartment. and the systema s a whole was in good shape i checked the r or resistance of the pallet through out the system. just didnt take my time. found some sad attempt to...
2003 Cadillac CTS 3.2L No Start VIN: 1G6DM57NX3
This may not be a proper fix,,, but it works. Of the two wires from the computer only one had and measureable voltage dispite the two wires showed identical partial circuitry in the pcm. One wire had 3v dc and the other wire 0v, so I used multiple resisters (1... Trouble codes: P0335 (crank sensor).
1997 Chevrolet Cavalier Z24 2.4L Cl and pressur plate not releasing VIN: 1G1JF12TXV
1997 Chevrolet K2500 Cheyenne 6.5L fuel gauge VIN: 1GCGK24F3V
We have been in contact with the coustomer and he has not had the time to leave the truck for us to do further testing. He said with the cap left loose gage seems ok. Thanks to all who helped.
1998 Chevrolet Lumina 3.1L starter VIN: 2G1WL52M5W
i put a ignition switch in the car.i talked to customer the other day and the car has been fine.i want to say thanks for all the help.i got a lot of responces.
2000 Chevrolet Silverado 1500 5.3L Engine VIN: 2GCEC19T9Y
Thanks to all the response on this subject. Im leaning toward the piston clearance problem myself. since nothing appears on drain plug magnet during oil changes. I thought it was either gaulded piston or piston clearance.Im not going to tear into it right now....
2001 Chevrolet Silverado 2500 6.0L Airbag light VIN: 1GCHK29U51
I have tried some of your recommendations, I tested the light for a possble short, it is not shorted keeping the light on, the airbag module is controlling it, it will flash 7 times then stay on. I was going to try and reprogram the module but my reprogrammer ...
2001 Chevrolet Prizm 1.8L dlr, VIN: 1Y1SK52861
Ok guys this thing is fixed and I want to thank everybody for the great tips. It turned out to be a ground wire to the dlr and after looking at every ground and cleaning them I still could not find it. Out of frustration I ran my own ground from the dlr under ...
2003 Pontiac Sunfire SE 2.2L Headlamps VIN: 1G2JB52F53
First thanks to all you iATN techs who took the time to help me out. I replaced the whole front headlamp harness from the dealer which did have shorted out splices in it, however a short was still there. I found the problem by luck. When I was under the dash c...
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