× 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 November 14, 2007
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
1994 Cadillac DeVille 4.9L Heater VIN: 1G6KD52B1R
drivers side temp is 25 degress less than passenger side...this is not a dule zone system. blend door moves free throughout its full range. any ideas would be great!! thanks!
1991 Chevrolet G20 Chevy Van 5.7L No Start, WITH ESC PLUGGED IN VIN: 2GBEG25K0M
The odd part with this one is we found out the engine will not start with the timing connector hooked up but it will stay running if it is plugged in while the engine is running, but there is no timing change. It took awhile but we confirmed it is the right co...
1992 Chevrolet Lumina 3.1L oil pump shaft VIN: 2G1WN14T5P
Need help with this one guys, I got in over my head. This is a car that I own, purchased from another family member with bad transaxle. Removed tranny, installed O/H kit,reassembled and installed. Now pumpshaft breaks upon start up. I have had it out twice wit...
1999 Chevrolet Tahoe LS 5.7L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GNEK13R1X
This vehicle cuts out and at the same time the tach starts to jump around, drop out. It seems though the ignition is cutting out for a split second. any help would be appreciated. Trouble codes: P0300
1999 Chevrolet Express 1500 5.7L Speed-O VIN: 1GBFG15R1X
Van came in with a bouncing speed-o & erratic shift. Replaced VCM (after market) & Lastest Flashing. Now shifting is fine but speed-O reads high, dose anyone know calibrates the speed-o.Abs & Cruise work fine and reads correct mph. Dose not have a DRAC that I ...
2000 Chevrolet S10 2.2L squeeling noise VIN: 1GCCS1954Y
hello everyone, this is my first time so go easy on me. This is a friends vehicle. It just started making a loud squeeling noise above 2000 rpm in neutral. the noise started on the freeway at 65 mph and continued to come in at a lower and lower speed. The mil ...
2000 Chevrolet S10 4.3L Cuts out, MIL Lamp on VIN: 1GCCT19W5Y
Greetings GM Techs. I have this s10 that came in 2 weeks ago with the check engine light on. Brought vehicle in and checked, had 3 codes (p0122, P0452, & P1122). Checked throttle position sensor, could not get to act up, removed and found spring tension broken... Trouble codes: P0122 (Throttle Postion Sensor Low Voltage), P0404, P0452 (Fuel Tank Pressure Sensor Low Voltage), P1122 (Throttle Postion Sensor Low Voltage)
2001 Chevrolet Silverado 1500 5.3L Misfire VIN: 2GCEK19T81
hi guys thanks for all your help in advance. i got this 01 silverado. this truck only misfires at idle. above about 1500 rpm it is clear as a whistle. it doesnt have any driveability issues besides that. it misfires randomly on most cylinders, but does a predo...
2001 Chevrolet Monte Carlo LS 3.4L wiper motor VIN: 2G1WW12E91
Wipers work fine in all positions. and so does washer. When the customer turns off the wipers, the wipers go all the way up the windshield and stops instead of going to the down park position. Anyone ever run into this problem? We believe it is the motor or th...
2001 Chevrolet Express 3500 5.7L Misfire, MIL Lamp on VIN: 1GBHG31R41
Hello Techs, I need help with this van, it has me stumped.To begin with I had put a reman motor in about four months ago with no problems, last week it had come in with a check engine light on ,code p0300. I had check the basics and replaced the distributor ca... Trouble codes: P0300
2002 Chevrolet Blazer LS 4.3L low pedal VIN: 1GNDT13W72
truck was towed in with very low brake pedal , checked brake fluid was full / r/r 4 wheels -checked each caliper to see if it locked up -ok. line block each caliper -pedal still very low . we installed new master cyclinder and bled 4 wheel brakes ---still low ...
2003 Chevrolet Cavalier 2.2L Excessive Emissions, Misfire, MIL Lamp on VIN: 1G1JC12F63
car came because of check engine light on with p0302 stored. code was not current. while watching data misfire counts on scanner fluctuated between 2 and 10. history counts read 150 on 1,3, and4, but read 15,000 on cyl.2. spark was weak on #2. tested coil resi... Trouble codes: P0302
2004 Chevrolet Silverado 1500 4.8L Starting VIN: 1GCEK14V94
I repaired this truck (changed cab) all original wiring, colum, and modules. Now that its together, I cant get it to start. It will crank for as long as you want when you first turn the switch on but won't crank again unless you turn the switch off and wait ti...
1998 GMC Yukon SLE 5.7L carrier VIN: 1GNFK16T51
I cannot get the carrier and the shims into place in order for me to obtain the backlash specification. Its too tight! I have heard of a housing spreader. Is this necessary to get the shims in there? The factory shims were much too thick. Also, it is my unders...
1999 Oldsmobile Silhouette Premiere 3.4L turn signals VIN: 1GHDX03E5X
Hi Guys, Problem is intermit inop flashers both turn and hazard. Customer purchased a new flasher and can't find where it goes. Both flashers work a few flashes and quit. Lights all functional. Connections at multifunction switch connection under column look ...
1999 Oldsmobile Silhouette Premiere 3.4L draw VIN: 1GHDX03E3X
I have this Olds Siloette , customer complaint is that after sitting it wil intermitantly have a bad battery . Some times it will take a week other times it may take an hour or so. I removed his new battery which was stone dead . put in a new battery to test i...
2003 Oldsmobile Silhouette Premiere 3.4L Cam senser VIN: 1GHDX03E53
Hi all first timer dreaded minivans... R&R heads as normal. cranked, started immediatley runs good . instant mil on P0341 cam code. followed Mitchell diag all ok. new pigtail & senser any way still no signal. wiggled & pulled on all wires & conections. can put...
1996 Pontiac Bonneville SE 3.8L Unknown VIN: 1G2HZ52K4T
this is a good one. first off it will not do it all the time. go figure right. customer complans that it jerks at around sixty to sixty five mph. about one to two times in a 20 mile drive. and other day's it will not do it at all. i drove this car for about 25...
2000 Pontiac Grand Am SE 2.4L Poor Fuel Economy, high idle VIN: 1G2NF52T3Y
hello, thanks in advance for any help or suggestions. this vehicle came into our shop awhile back, with a high idle condition. i did a thorough check for vacuum leaks and checked the function of the IAC and checked minimum airflow.everything OK there. i notic...
2001 Pontiac Bonneville SE 3.8L Ignition VIN: 1G2HX54K81
Just received this Bonny with an intermittent start issue. I "think" I have a 50/50 shot here...either the ignition switch or the pass key cylinder. It has full power...instruments, radio, lights, etc. Occasionally when the key is turned to start there is noth...
1998 Saturn SC2 1.9L Poor Idle Quality, Stall VIN: 1G8ZH1274W
vehicle came into the shop stalling at idle, removed egr was stuck in open position, cleaned egr and vehicle runs at idle, short term fuel trim is -30 at idle found cracked temp sensor replaced sensor no change. if you allow vehicle to idle then touch the thro...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Rendezvous CX 3.4L MIL Lamp on VIN: 3G5DA03E43
Sorry for repair delay. this ended up be a long repair. The cam shaft bearings had worn enough that the cam was pushed too far from sensor to trigger. Due to valvetrain load the shaft was always pushed away from sensor. My issue with this is the engine sounded... Trouble codes: P0340 (cam sensor).
1992 Cadillac DeVille 4.9L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1G6CD53B2N
Sorry, forgot to mention that we had already inspected fuel pressure regulator and it also checked ok. One response mentioned problems with cam lobes on 4.1 and 4.5 engine. This is a 4.9, but I still think the problem is likely a flat cam lobe. We will never k...
1995 Chevrolet Monte Carlo Z34 3.4L engine VIN: 2G1WX12X9S
Sorry for long reply time, have been away and only just got back. We have tried everything that was offfered to us in the help mail. With the PCV disconnected we have no issues at all. We have done all updates to car including valve cover, pcv re-route line an...
1995 Chevrolet C1500 Cheyenne 5.7L Hesitation VIN: 1GCEC14K5S
Hey Fellow Techs This one turned out to be the exhaust. Restored to O.E.M. exhaust and all is well. Thanks for all your help. Louis Trouble codes: N/A (none).
1997 Chevrolet Cavalier 2.2L Misfire VIN: 1G1JF5241V
Hi sorry it to so long this job was put off for a week just got back to it this week after checking fuel pressure,check timing and chain installed used computer this seemed to be the problem runs good now thanks to all that replyed Trouble codes: P0300.
1998 Chevrolet Cavalier 2.2L vtd system, codes VIN: 1G1JC5249W
I did not have the opportunity to fix this car for the customer decided not to have the repair done. I got several replies suggesting the sensor on the ignition cylinder was the cause of the problem. One reply went further and gave the direction to unplug the ...
2001 Chevrolet Silverado 2500 HD 6.0L No Start VIN: 1GCGC24U1Y
Checked fuel press. after shutting off vehicle and noticed press. guage dropping rapidly.Replaced fuel pump module assy,then press held.Thank to all.
2001 Chevrolet Silverado 2500 HD 6.0L Cuts out, Stall VIN: 1GCHK24G01
The customer finally brought the truck in. Checked the crank sensor against a new one, found that the end of it was worn replaced it with a new one, and corrected the problem of shutting down. Thanks for all the fixes that were sent in. Thanks again Eddie
2003 Chevrolet Silverado 3500 6.6L Hesitation, Engine Noise
Well, GM changed the flywheel and rebuilt the tranny pump and his noise is now gone. However he is still complaining of an intermitten smoking problem, just kinda randomly occurs. I'm pretty sure a #8 injector will fix that concern if he brings it back I will ... Trouble codes: P1093 (Fuel Rail Pressure).
2003 Chevrolet Silverado 2500 HD 6.6L 3-4 shift VIN: 1GCHK29163
Well this one is not fixed, 4 replies on it and we thought that it was internal transmission problem so we bought a core with a broken extension housing and went through it but had to use the bellhousing and extension housing from the old trans due to cooler l...
2004 GMC Sierra 1500 SLE 5.3L master VIN: 2GTEK19T24
Sorry for the delay. I am closing this for my employee who originaly made the request as he is gone hunting. We have never been able to verify the customers complaint. He is claiming the brakes feel soft ever since he hit some metal strapping on the street. We...
1998 Saturn SC2 1.9L Poor Idle Quality, Stall VIN: 1G8ZH1273W
want to thank everyone for the help. I checked the temp on the scanner it was 19 degrees F at 60 degrees ambient temp, one of the other techs also saw that the battery hold down was touching the battery posts dp battery I don't know how I missed that one need ...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next