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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 1, 2010
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
2001 Buick Century Limited 3.1L Odometer VIN: 2G4WY55J01
Hi all, This car has an instument cluster problem. About a year ago the gas guage stopped working and always reads overfull. I believe I diagnosed it with a bad sending unit. It has voltage and ground at the connector and when unplugged reads empty. It was dec...
2006 Buick Rainier CXL 4.2L Starting VIN: 5GADT13S26
2006 buick rainer towed in ,customer states stall no start no crank.set codes p1516,p1682,p2122,p2127 and p2128.app sensor voltage good,has power thru crank fuse but no power at etc fuse.thanks for any help.
1998 Cadillac DeVille 4.6L Overheating VIN: 1G6KD54Y8W
Thank you for your help! Well this is turning out to be one that I should have let go somewhere else. Customer has had several shops work on it at different times. Complaint is overheating intermittantly. Sometimes when driving and other times when idling. Coo...
2003 Cadillac DeVille DTS 4.6L No Start VIN: 1G6KF57973
This 03 Cadi was towed in for a no start. Battery dead of course so I charged it. Went to start it and turned the key. The cluster comes on but when you put it in the start position the cluster shuts down,but the starter does not engage. I checked the starter ... Trouble codes: U1000 (Class 2 malfuction)
1989 Chevrolet Caprice Classic 5.0L No Start, Stall VIN: 1G1BN51EXK
Car came in with intermittent stall. At first could not duplicate problem. Let run in shop for about an hour and it died. Restarted scanned ignition, showed to be ok. While idling I caught it just before it died, and sprayed carb cleaner in throttle body and k...
1993 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Misfire VIN: 2G1WL54T8P
Greetings iatn techs. We have this 93 Chevrolet Lumina 3.1 California Emmissions car that has came in for complaint of high idle, rough running, a/c not working, cruise not working. Checking the high idle, found short vaccum hose with hole in it. Replaced with... Trouble codes: 13 (Open O2 Sensor Circuit), 14 (Coolant Temp signal Voltage Low), 15 (Coolant Temp Signal Voltage High), 21 (TPS voltage high), 22 (Tps voltage low), 23 (MAT Sensor Signal High)
1999 Chevrolet Silverado 2500 LS 6.0L Master Cyl ????? VIN: 1GCGK29U4X
Truck has Hydraboost system. We could not get the problem to appear during road test. Customer states pedal drops to floor with TOTAL loss of braking. Happens only when going slow and riding pedal...like in parking lot or stop and go traffic. Customer states p...
2006 Chevrolet Silverado 1500 LS 5.3L 1-2 Shift VIN: 1GCEC19Z66
I have a 2006 Silverado with the 5.3 and a 4L-60. I can operate the 1-2 solenoid from the PCM with power probe. That tells me the wiring is in good order. However, using scan tool to command the 1-2 solenoid does not operate solenoid. Good power at solenoid.
1998 GMC K1500 Sierra SL 5.7L fuel guage VIN: 2GTEK19R7W
This fuel guage has a very slight viabration at all times with the key on. No matter if the engine is running or not. I've checked everything that I can think of on this vehicle that might cause this viabration and I can't come up with anything that will fix i...
2007 Pontiac Montana SV6 3.9L Steering VIN: 1GMDV331X7
Customer complaint when steering to Right steering is very hard to steer, return to left and then right works normally. Only has happened twice in the last three weeks, vehicle is warm when problem has occured. Anyone come across this issue, is there a steerin...
2004 Saturn Vue 2.2L Noise/Mil On VIN: 5GZC33D64S
After replaceing the ratio control motor (upper valve body) and refilling the transmission, the transmission worked fine during the first road test. I let it cool and drove it again, the noise returned (sort of a washboard noise) and it went back into limp mod...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Buick LeSabre Custom 3.8L Cuts out, Stall VIN: 1G4HP52K55
After a PCM replacement was done, the IAC signal returned to normal. The vehicle still had a minor low idle issue, so at that point we decided to perform an intake and IAC passage chemical cleaning on this vehicle. The difference in idle and performance was qu...
2001 Chevrolet Prizm 1.8L Hesitation VIN: 1Y1SK52871
this vehicle is still here at our shop. i have exaushted all my ideas as to what could be wrong with this vehicle. i have performed all the tests that have been suggested to me and all came up with no conclusive results bad, they all passed. we are going to re...
2004 Chevrolet Silverado 2500 HD LT 6.6L Oil usage VIN: 1GCHK23114
I called customer today and he was almost back home in Colorado and had already added 6 Quarts of oil so the air filter did not correct the oil usage and I was unable to have the vehicle long enough to get anywhere with it. Thank You for your time and I am sor...
2003 GMC Yukon Denali 6.0L traction control VIN: 1GKEK63U73
2004 Saturn Vue 2.2L Cruise VIN: 5GZCZ23D04
Thanks for all the replies after testing all the switches found out that the set switch was bad.Customer has not decided to repair at this time.
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