× 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 October 17, 2008
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
2002 Cadillac Escalade 5.3L a/c line VIN: 1GYEC63T52
now it came back not cooling found the two a/c lines going from receiver drier to fire wall (evaporator) are leaking replaced both o,rings from factory dealership recharge system add dye. leakeage still coming from the same lines. removed lines inspected o rin...
1985 Chevrolet P30 School B 366CID motor on hydraboost VIN: 1GBJ6P1B5F
I'am working on a school bus with hydraboost. There is an electric motor mounted on the bottom of the hydraboost. The motor runs all the time and is hot to the touch. I was told the motor is a backup for the system if the power steering system fails. There is ...
1989 Chevrolet USPS LLV 2.5L No Start, Stall VIN: 1GBBS10E8K
USPS LLV came in towed, refused to start. Will start for just a second and then stall. Appears to be losing spark. Checked for other problems (Fuel, Compression, Injector Pulse) and replaced the distributor finding nothing else wrong. Didn't fix it or change s...
1998 Chevrolet Lumina 3.8L Poor Idle Quality, Misfire VIN: 2G1WL52K2W
Howdy, working on this 98 chev. lumina 3.8k engine code, runs rough and misses at idle,no abnormal noises or other driveability complaints, cylinder balance test and missfire counter on scan tool confirms miss on #1 cylinder, miss goes away when throttle is cr... Trouble codes: P0301, P0300 (random miss)
1999 Chevrolet Silverado 1500 5.3L Odometer and PRNDL indicator VIN: 1GCEK19T2X
I have a 1999 Chevy Silverado with the Odometer and the PRNDL indicator Inop. Tested all fuses and they were all good. when I was looking through all the other posts for Instrument cluster issues I saw that the transmission range selector on the transmission w...
2000 Chevrolet S10 4.3L heater core VIN: 1GCDT14W7Y
The heater core plugs up daily. The core is then flushed and by the next day it is plugged up again. The truck has good heat immediately after flushing the core. When flushing there are small chucks of orange crud that come out. I have flushed the radiator and...
2003 Chevrolet Silverado 1500 4.8L complete sys VIN: 1GCEK19V43
Customer complains that the truck dies randomly under braking or hard turns. He states that there is no rhyme or reason to when it will happen. Sorry about the lack of tests, but he is out of town and wants to bring it in when he gets back next week or so. I t...
2005 Chevrolet Silverado 1500 LS 5.3L abs module VIN: 2GCEC13T55
hey fellow techs this truck came to me with the abs light on steady. meaning no bulb check on yellow abs warning light only on red brake light . hooked tech 2 to dlc and try to get abs codes and data but no comunication at abs module got into pcm body and ipc ...
2006 Chevrolet Colorado LT 3.5L timing chain tensioner VIN: 1GCDT13676
This vehicle came to the shop with a valve seal/seat problem. Sent cylinder head out for repair, wedged chain and tensioner with GM Special tool per GM repair procedure. Reinstalled cylinder head with new gaskets after having it repaired. Installed, cams, spr...
2007 Chevrolet Cobalt SS 2.0L engine VIN: 1G1AP15P77
This is a odd one... Customer stops in to dealership with the engine making a rattle noise. With Mechaninc stethescope noted loudest noise at the camshaft sensor housing. very intermittent. Sympton will diapear while trying to isolate. Customer indicates engin...
1998 GMC K2500 Sierra SL 6.5L Cuts out, Stall VIN: 1GTGK29F5W
hi guys thanks in advance we have a customer complaint of this vehicle quiting we have not experienced this yet but it has been doing it for approx 6mths intermittently.customer sayshecan pull up to light and vehicle will just quit it will restart but will not...
2002 GMC Yukon XL 2500 SLE 6.0L Unknown VIN: 3GKGK26U52
Ok bear with me on this one, it is going to be tricky to describe but I will do my best. Today the customer came in with a noise concern and now I will try to desribe the noise. It sounds a lot like a belt squeek inside of a hollow room. It is always there and...
2000 Oldsmobile Silhouette Premiere 3.4L fuel guage VIN: 1GHDX13E1Y
Have this Silhouette the fuel gauge reads empty. Scanner always reads 0% even with the sensor unhooked. I have checked the sensor purple wire all the way to the PCM and my resistance readings are about 120 ohms at the pcm connector and it varies when I rock th...
2000 Oldsmobile Intrigue GX 3.5L Engine Temperature VIN: 1G3WH52H8Y
Greetings IATN techs. I have this 2000 Oldsmobile Intrigue that come in with an overheating problem. When i drove car to verify, it would get 235 degrees or warmer. Replaced thermostat with NAPA stat. Drove car, and didn't overheat driving near as much( still ...
2000 Oldsmobile Intrigue GX 3.5L Engine temp VIN: 1G3WH52H4Y
I have a 2000 olds Intrigue that is overheating. Customer says problem started after water pump was replaced at another shop. While crusing at low rpm engine temp will climb to 235-240 degrees with both fans running at high speed. If I speed the engine up temp...
1990 Pontiac Bonneville SSE 3.8L Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1G2HY54CXL
The check engine light is on with a cam signal missing code, we know that the magnent for the sensor is missing but the vehicle still will run. Our problem is at anytime the vehicle will just quit. It is an instanenous quit, almost like someone turned the key ...
1998 Pontiac Trans Sport Montana 3.4L detonation VIN: 1GMDU03E4W
sorry about the long story but i figured the more info the better,we normally work on german cars, but i have this friend that owns this car, his kids have been driving the car with a bad water pump, so for several months the car was driven with coolant in the...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal LS 3.8L Inst.cluster VIN: 2G4WF5516Y
Thanks to all who replied,checked the loom where it goes around the dryer to no avail, also took a close look at the shifter(removed all covers also to no avail) Advised the customer that I would need more time to track down the fault. They were not intrested ...
1999 Buick Century Custom 3.1L auto climate control VIN: 2G4WS52M7X
Thank,s goes out to all replies. I actually never fixed the problem and was able to sell the vehicle with the a/c blowing cold, but the display not working properly. I did learn a lot from it that will help me in the future when I get the next vehicle with the...
1984 Chevrolet C70 366CID low power under load VIN: 1GBG701B4E
I ended up pulling the carb and rebuilding it. The power valve was leaking as was he secondary air valve diagphragm and the govenor diagphram. I also put a new fuel pump on the truck. It now runs like a new one. Thanks to those of you who took the time to re...
2001 Chevrolet Blazer LS 4.3L Stall VIN: 1GNDT13W51
2003 Chevrolet Silverado 2500 HD 6.6L transmission VIN: 1GCHK23163
Thanks for the help replaced FICM and curred problem
2003 Chevrolet Trailblazer North Face 4.2L radio VIN: 1GNET16S03
Thank you for the replies. After ohming all of the speaker wires,disconnecting one speaker at a time from the back of the radio, and checking all powers and grounds the problem was still present. The final problem was four defective speakers. Not only were...
2004 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 2GCEK19T54
truck came frome another shop we were lied to they never replaced the sensors like they told the cust. ohm out perfect but did not pass the mv test while knocking on engine block replaced sensors and tightened to specs all is well Trouble codes: 327 (knock sensor), 332 (knock sensor).
2001 GMC Savana 3500 6.5L Poor Idle Quality, Surge, MIL Lamp on VIN: 1GTHG35F31
hi guys thanks for tech tips. after testing injector pump found it to be broke up inside.replaced it and pump module.van now running like new. Trouble codes: P0219, P1218.
2003 GMC Sonoma SL 4.3L Hesitation VIN: 1GTCS14X03
Thanks for the help. I had somebody rev the eng. while I watched the wave for crank sensor. It showed glitchs at 4000 rpm. I replaced the cranks sensor and it runs perfact.Thanks again. George
1993 Pontiac Grand Am SE 3.3L Surge VIN: 1G2NE51N5P
customer returned,found vehicle stopped actting up when IAC valve was disconnected.R&R the IAC valve.road tested vehicle,repair complete.Thanks for help.
2000 Pontiac Grand Prix GTP 3.8L rear VIN: 1G2WR5212Y
the driver of this car is not the smartest person the engine was allmost stalling at stops caused by faulty maf sensor nothing to do with the rear end. thanks for all the help every body had some great ideas and i'm sure thhey would have fixed the problem if t...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next