× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 4, 2005
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue Ultra 3.8L MIL Lamp on VIN: 1G4CU5218S
Replaced leaking vacuum lines and O2 sensor which showed bad. Went through diagnostic flow chart, points to PCM. Replaced PCM still has code. Tested all wiring to sensors (Boost solenoid, TCC, EVAP solenoid). Tested all powers and grounds. Unplugged solenoids,... Trouble codes: P1640 (QDM 1 Circuit)
1997 Buick Riviera 3.8L Drivetrain VIN: 1G4GD2214V
Hello guy`s I have this 97 riviera that I got from a local body shop that could not get it. They tell me it was dropped off the lift at a tire store. when vehicle hits 65mph the steering wheel shakes violently. does not change when foot is let off gas until ve...
1999 Buick Regal GS 3.8L No Start, Stall VIN: 2G4WF5212X
Thank you in advance for your help. 1. Sometimes after sitting this car will start and run normally. After 5 minutes or so, it will die, and not restart. 2. In the crank position it will try to start, but die immediately when turned back to the run positio...
1990 Cadillac DeVille 4.5L Misfire VIN: 1G6CD5337L
Greetings Caddy techs...I've got one here that I thought initially would be a slam dunk but I'm the one being dunked. The car came in with a steady misfire. Determined, as the last shop[s] had, that it is on #2 and #7 cylinders, no difference cold or warm. Bot...
2000 Cadillac DeVille DTS 4.6L Brake switch circuit VIN: 1G6KF5799Y
Good day folks. We received this car with a report of the traction indicator on intermittently. Failure codes C1294 and C1295 were stored. The brake circuit seemed to operate normally but visual inspection showed some pitting in the brake switch contacts. We r...
1989 Chevrolet Cavalier Z24 2.8L Excessive Emissions, Surge, Misfire, Poor Fuel Economy VIN: 1G1JF11W2K
this car came in because it would die every so often. the first thing i did was run a scan on it every thing appeared to be normal. i then ran a 4 gas anylysis on it it was running at 9.00% co with around 300ppm hc the o2 sensor is still switching all the sens...
1991 Chevrolet Lumina Euro 3.1L compressor VIN: 2G1WN54T8M
AC cools great at idle except when you turn the steering wheel you hear the compressor clutch click off and then back on. It cools good when you drive.It only clicks off after you stop turning the wheel and comes right back on. Thanks in advance for your help.
1996 Chevrolet Lumina APV 3.4L Cuts out VIN: 1GNDU06E7T
Hi gang, this van will cut out and restart very quickly at highway speeds and the check oil light stays on for a few seconds just as it does when the van is first started. I have run it with the fuel pressure gauge hooked up, but it happens so quickly that not...
1997 Chevrolet K2500 5.7L speedometer VIN: 1GCGK24R9V
please help,i have been trying to find the vehicle speed sensor buffer control module. the gm manual reads that it is behide the i/p i have taken the glove box out and looked all over the back of this unit and can not find anything that looks like what they sh...
1997 Chevrolet Cavalier 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1C1JC5247V
vehicle returned to shop following monday. mil on and P0300 stored. scope checked ign. found all normal. misfire data/ misfire on all cyls. alternating, LTFT at -8 STFT at -17 customer has stated that #2 fuel injector had been changed about 3 weeks prior. we d... Trouble codes: P0300
1997 Chevrolet K1500 5.7L Poor Idle Quality, Hesitation, MIL Lamp on
fellow technicians any direction would be great. this truck came in with ck eng. lite on and a code po131 stored. also had some other distributor related codes in history. found someone had dist. out. inspect and found cam synch at 7 degrees. replaced cap and ... Trouble codes: P0131
2000 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 2GCEK19TOY
This is the second of the new body style chevys i have seen with this code this week, the first was a 1999 and after a tsb search i found a gm bulletin to replace the vent sol. and hose assy with an updated one. These are both farm/gravel road trucks. I am get... Trouble codes: P0446
2000 Chevrolet Impala 3.8L Cuts out, Stall VIN: 2G1WF55K9Y
This car is going to take what little hair I have left. It will intermittently cut out in a rythmic pattern, check engine light, brake light and trac off light will blink in rythm with the cutting out. It will stall if allowed to idle, but keep running if acce...
2000 Chevrolet Blazer LS 4.3L Transfer case
Have a electronic controlled transfer case. Will not shift into 4hi or 4low. Sets code C0387, unable to perform shift. Diagnostic procedures lead me to replacing the module. Replaced module and switch. Still does not work. Can remove encoder motor and manually...
1993 Hummer H1 6.2L steering gear VIN: 137XE8337P
this suv came in with no power assist on steering.the cusotmer requested the power steering pump and belts replaced(his friend at the national guard told him that the pump is a commom failure)we replaced the pump and belts.it still has no assist,if you rev the...
1996 Pontiac Firebird Formula 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G2FV22P0T
Hello, I have a nightmare miss-fire condition and could really use some help. Started aprox. 2 weeks ago, car needed some injectors, replaced them(#4+6) returned with a miss, and check eng light (P0300), I determined that it needed a tune up. Replaced--Cap Rot... Trouble codes: P0300 (Misfire)
1996 Pontiac Grand Am SE 2.4L p1629 VIN: 1G2NE52T0T
Howdy guys, and gals. I got one of those that make you step back and say hmmmm...lol It's a Grand Am that came in about 6 months ago for an inop fuel guage. At that time I replaced the cluster and problem solved. About 2 months ago it came in on a hook with a ...
2000 Pontiac Grand Prix SE 3.1L speedometor VIN: 1G2WJ52J1Y
hello gang!! here we go again with the mistery veichle i am thanking you in advance,because i surelly know the value of the information handed down at IATN. i have recieved this veichle after it was at another shop for unrelated repairs.the service engine ligh...
2000 Pontiac Montana 3.4L No Start VIN: 1GMDUO3E2Y
to all GM guys. the van came in with a internmittent no start. I pulled out some codes p1626-loss of coded key controller whrein for a pass-keyIII module.I got a communication codes too u1301. After goin on the diagnostic tree we ended up replacing the Pass-Ke... Trouble codes: 1631 (incorrect security message from PASS-Key module), U1301

Fixes & Summaries for GM
Fix/Summary Answers
1986 Buick Electra Park Avenue 3.8L Battery VIN: 1G4CW69B9G
Finally found fault. We diconnected fusible links one at a time until battery drain was gone - on the two wire links we isolated each wire. The problem was found in the link to the ignition circuit. We then disconnected ignition switch and problem was gone. Up...
1994 Buick Skylark Custom 3.1L t/s flasher VIN: 1G4NV55M4R
Thanks for the input from all. Found it! It was under the steering column, way under the dash behind the fuse box. It was not in it's holder. Looked in that area one more time and had to bend away the fuse panel bracket. It is a standard #552 flasher and I sho...
1998 Buick Regal LS 3.8L starting and dash lights VIN: 2G4WB52KW1
thank you for your replies the problem was the ignition switch. Bob and Jason you are correct. thanks agian to everyone for the help.
1997 Cadillac DeVille 4.6L Hesitation, MIL Lamp on VIN: 1G6KDS2Y6V
to fix this one took a while finially got to act up while driving eith scope hooked up and saw that ignition control moudule quit sending out 24x signal at time of problem replaced control moudule and everything worked good no more problems thanks for eveyones... Trouble codes: P0372, P1377.
1999 Cadillac Seville STS 4.6L fuel gage VIN: 1G6KY5492X
Finally located problem. The battery transister at the battery would overheat, moved it away from positive battery cable, everything started working corectly. Thanks for all the replies.
1990 Chevrolet Camaro Iroc-Z 5.7L Hesitation, Surge VIN: 1JCCF87E2F
Sorry for this late post. My cohort was supposed to have answered this. Anyway ,we installed an adjustable fuel pressure regulator from JEG'S and dialed down the pressure. Jeep runs great now. Trouble codes: 45 (over rich).
1995 Chevrolet K1500 Cheyenne 5.7L Hesitation VIN: 1GCEK19K7S
Replaced EGR valve with one from the dealer. Took care of problem. Used aftermarket first time and did not fix.
1996 Chevrolet S10 LS 4.3L Cuts out VIN: 1GCCS19X5T
I have coverd all areas from the replies i recieved vehicle stil has this relay problem,i no longer work at the shop that has the truck so am unable to report more,thanks for all the input. I do not have a computer at home so i cant really help others the way ...
1997 Chevrolet S10 2.2L A/C Hose VIN: 1GCCS1442V
I failed to mention in my original request that after the third hose failed I figured the cause must be a vibration problem. After replacing the third hose I checked motor and trans mounts and all compressor mounts and brackets. I also installed an additiona...
1999 Chevrolet Silverado 1500 5.3L steering box or intermiant shaft VIN: 1GCEK14T1X
First of all, thanks alot for the help. The truck was scheduled for yesterday to return. First we unhooked the lower intermitant shaft at the gear box. Used a visegrip to turn the gear box. Noise was still there in the gear box. Replaced the gear box & flushed...
1999 Chevrolet Silverado 2500 6.0L A/C belt VIN: 1GCFC29U9X
Thanks to everyone for taking time to reply. This seems to be acommon problem. We replaced the compressor & all is well.
1998 Oldsmobile Aurora 4.0L p/d locks
We found the shorted wiringin both right and left door pillars. The rear p/w switches would also move the p/d locks with the key off. Also rr p/w woundn't work. We replaced the p/d lock switch in the lf door and used parts from the old switch to repair the swi...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next