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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 6, 2010
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Open Help Requests for GM
Help Request Answers
2004 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G5TR4EDF4
Okay Caddy masters, this deville is driving me crazy. The code is P0455, and before the check engine light comes on it will read "check gas cap", and this fault returns within 10 miles of clearing it. So far I have of course replaced the cap, I have also repla... Trouble codes: P0455
1988 Chevrolet S10 Blazer 4.3L Poor Idle Quality, Stall VIN: 1GNCS18Z6J
hello, This high miler blazer came in with multiple symptoms & 1.4 volts at the O2 sensor ckt. checked & repaired bad ecm ground (beside O2 sensor on wire harness at ECM.) and retested. ECM failed tap test. replaced & retested all good. 2 days later car ret...
1991 Chevrolet K1500 Silverado 5.7L Hesitation, Misfire, MIL Lamp on VIN: 2GCEK19KOM
changed plugs wires cap rotor fuel filter cleaned tbi. Trouble codes: 43 (esc)
1999 Chevrolet C3500 6.5L Excessive Emissions, Stall VIN: 1GDKC34F6X
The owner says that the truck has always smoked since they have owned it. (about 80k miles). The drive says that it randomly dies and sputters. I have only had it die on me one time. The only thing I can think of is either the fuel cutoff solenoid or the pump ...
2000 Chevrolet Suburban 1500 LT 5.3L blend door VIN: 3GNFK16T0Y
Please help GM Techs!! This is my Honda Techs wifes truck. He replaced the rear main oil seal and had disconnected the battery. Now the vehicle has no heat.He tried to reset the system based on some online info he had found and now the blend door cylces open a...
2001 Chevrolet Suburban 1500 LT 5.3L Stall VIN: 3GNFK16T11
got a 2001 suburban stalls going down the road intermittently, like someone turns the key off, no codes, found restricted fuel filter replaced filter still stalls thought may bad ignition switch only time it stalls is going down the road under light load and d...
2004 Chevrolet Corvette 5.7L Heads up display and driver info center VIN: 1G1YY22G24
Hello Techs! When customer parks vehicle overnight, he has left driver info center on average fuel economy, and heads up display on fuel reading. Next morning the driver info center is on odometer and heads up display is on speed and oil pressure. Any thoughts...
1993 GMC C1500 Sierra SLE 4.3L stalls with a/c on VIN: 1GTDC14Z0P
temp. has warmed up now veh. is stalling again. didn't stall during winter. No codes
1991 Oldsmobile Cutlass Supreme 3.1L no scan data VIN: 1G3WH11T3M
Today I installed the ECM, and now I have the capability to enter the data stream, but nothing has any values except the CTS -40 and MAT [...]. Trouble codes check and scanner says there are none. Also by jumping A and B at ALDL there is only a code 12, a...
2004 Oldsmobile Alero GL 3.4L HVAC control VIN: 1G3NL52E64
hey everyone! need some help with this Alero. originaly a no-start, replaced the igntion switch and everything was golden. the customer came back next day saying he had no ac or rear defrost. which had been working prevuiously ( so i was told). at first i tho...
1996 Saturn SC2 1.9L cooling fan/fan clutch VIN: 1G8ZF1592R
Fellow Technicians: Vehicle Came in with "overheat" issue. Engine only overheats while stopped. Leads me to believe the engine cooling fan is not working properly. Tested all cooling system components: ECTS, T-Stat, W-Pump, antifreeze/coolant level & Conditio...
2001 Saturn L300 3.0L Cuts out, Stall VIN: 1G8JW52R51
Vehicle stalls while driving. Like someone shuts the key off. Very intermittant. No codes in PCM. Anyone heard of something like this? I checked all my timing marks after replacing the timing belt, and everything is dead on..
2004 Saturn Ion-1 2.2L door locks horn VIN: 1G8AZ52F24
I have this saturn ION in that has a problem with the door locks and horn. I can not duplicate the problem, but costomer says the door locks will lock and unlock like you are pushing the button. the horn will also honk when the door locks are on the fritz. say...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac DeVille 4.6L rap VIN: 1G6KD54Y1X
checking for power at the ign sw connector while it was unpluged.I found low power at the d-6 pin which was enough to keep rap active. Pulling the acc fuse in the trunk fuse box got ride of the power to ign pin d-6 but the raido was still on next I pulled th...
2001 Cadillac DeVille 4.6L ebcm VIN: 1G6KD54Y81
Thanks for the replies. The fix on this ended up being a new ebcm. It was just a little tough for me to accept that a new sealed module direct from the dealer was bad, but that's how it goes.
2002 Chevrolet Impala 3.4L Accessories VIN: 2G1WF55E12
i came in this morning and everything on this car worked. the radio was unlocked and working, the message center had no messages. all replies pointed to the BCM and since i have no means of programing it i suggested the customer take the car to a dealer. if...
2004 Chevrolet Avalanche 1500 5.3L Excessive Emissions, No Start, Misfire VIN: 3GNEK12T14
Vehicle had deisel in it. Removed tank and emptied/cleaned it out and put fresh fuel in. Road tested and everythink was great. Funny, I took a fuel sample in the beginning while testing the flow volume and didn't see anything abnormal. While draining the tank ... Trouble codes: P0300 (testing and results).
2005 Chevrolet Corvette 6.0L stop light VIN: 1G1YY24U45
Hello all, thank you very much for helping me out here :-) It turned out to be much more simple than i thought. There is no central computer involved in this, so we just had to cut one wire by the brake light switch so the yellow lights dont work when brake...
2006 Chevrolet HHR LS 2.2L Poor Idle Quality, Hesitation, Misfire VIN: 3GNDA13D06
Hey Gang, Thanks for all your help. We eventually isolated the cause of the fault to exhaust valve issue. The customer declined repair and took the vehicle. I would have liked to see this thing through to completion but... Thanks again. Trouble codes: P0300.
2004 Oldsmobile Bravada 4.2L trans inop at times VIN: 1GHDT13S24
strange but true. Pulled the pan and found the filter plugged. Has lots of debris in the pan so it may not last but with a new filter and fluid she runs again(for now).
2006 Pontiac Grand Prix GT 3.8L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 2G2WP55216
Thanks to everyone for the advise, I found that the harness at the l/f shock tower for the app/tps about 9 inches from the connector was rubbed through. I repaired 3 wires that were rubbed through and chaffed. The problem is now repaired. again Thanks to eve... Trouble codes: P2138, P1225.
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