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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 23, 2012
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Open Help Requests for GM
Help Request Answers
1998 Chevrolet Tahoe 5.7L No Start, Start & Stall VIN: 3GNEK18R9W
Hi guys, I got a wierd one here. This truck will crank and stall. If I spray carb cleaner in TB, truck will run. I believe the key is the problem, as it has no chip. I called custamer and he says it is the key he has always used. am I missing something??? To ...
2000 Chevrolet Impala 3.4L Instrument Cluster & Radio VIN: 2G1WF55E9Y
This vehicle has a battery draw. Drawing 1.5 amps. We trace the draw to the radio fuse and the bcm fuse. We can unplug the instrument cluster and radio and draw is gone (1.0 amps with radio and .50 amp with instrument cluster. We replaced the bcm thinking that...
2003 Chevrolet Silverado 2500 HD LT 6.6L oil leak VIN: N0HAVEV1N0
Put new rear seal in, test drove it, and it looks like it is still leaking out of the rear main. Seems to leak the worst when you turn the motor off. Any help would be greatly appreciated.
2004 Chevrolet Suburban 1500 Z71 5.3L abs VIN: 1GNFK16Z64
Hello, when turning and taking off this Suburban will intermittently activate the ABS and the pedal will pulsate. Also the engine loses power as if it were being shut down. The stability light on the dash will come on sometimes but not always. So far I have sc...
2004 Chevrolet Tahoe LS 5.3L compressor VIN: 1GNEK13Z44
This Taho came in with complaint of no AC at idle. It has ATC with dual climate controls. I pulled it down and recharged it, It was pretty low, test drove it and it seemed fine. It came right back, compressor will not engage. It did not lose its charge. A sca...
2005 Chevrolet Suburban 1500 LS 5.3L Interior VIN: 1GNFK16Z25
I replaced the inst. cluster for an inoperative speedometer. Now I am having issues with the language on the message screen & the lights are different brightness. Is this something that has to be programmed? it worked ok for a while.
2006 Chevrolet Silverado 1500 LT 5.3L 4x4 VIN: 2GCEK13T36
Im not familiar with gmc nor 4x4 systems very well. This truck was just poned on to me from my boss and now i have to try to fix it.4x4 is inop and i got code c0321 with snap on scanner.its got 4 buttons as follows:auto,2wd,4lo,&4hi if i remember correctly. Wh...
2007 Chevrolet Cobalt LS 2.2L Misfire, MIL Lamp on VIN: 1G1AK55F77
Car has a p0300 code, and a p0302, it shows missfires on #2 at idle quite often, but you really can feel the missfire. We moved the plug, injector and code from # 2 to # 4 and the missfire stays on #2, the compression on #2 is about 10% less than the others. I... Trouble codes: P0300
2004 GMC Sierra 2500 HD 6.0L Interior Lights, Dash Lights, Headlights VIN: 1GTHK29U64
This truck came to me with a inerminant problem. At times when started the dash lights, headlights, radio, windows will flash or go on and then off. Relays click. Several times in the past i have had to splice wires under the fuse box under the hood due to mic...
1995 Pontiac Firebird Trans Am 5.7L Speedometer/Odometer VIN: 2G2FV22P7S
I have done a lot of work on this car. This is the last thing the customer requested to be fixed - the speedometer. He bought the vehicle on ebay and received it with no speedometer or odometer operation. Odometer is on 91,000. OK, while I had the trans out do...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L ABS module VIN: 1G4GD2215S
I have not tracked down this problem yet. The customer was not in a hurry and I got backed up. There are some great ideas I am going to try when I get a chance. The battery did end up being junk but that did not fix anything but hard to trace electrical prob...
1996 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 1GCEK19R2T
Well after hooking the lab scope to the power side of the pump i found about 8 amps of draw which i didnt think was bad, i did a volt drop and it was 1 volt difference from battery. I then inspected the fuse box and found the fuel relay to be completely melted...
2000 Chevrolet Impala LS 3.8L #4 cylinder skip VIN: 2G1WH55K7Y
Thank you for all the replies.First thing my leak down tester was not reading right.that 38 % leakage was not correct. Every cylinder I checked had the same reading even cylinder # 4.Compression was good also.I did go ahead and replaced the valve cover gaskets...
2001 Chevrolet Corvette 5.7L speedometer VIN: 1G1YY22G21
Even though the vehicle is not fixed... yet. I did learn that the VSS signa is sent to the PCM. The PCM then sends the signal on a bus line to the IPC and other modules. To change the speedometer setting: It can be done with an aftermarket tuner, It can be...
2003 GMC Yukon SLE 5.3L Sunroof VIN: 1GKEK13Z13
Hi All Thanks for your help.Unfortunately I did not find an easy solution.I had to drop the left side of the roof liner for access and move the sunroof forward.thanks to all who offered help. Francis.
2007 GMC Canyon SLT 3.7L Headlights VIN: 1GTCS13E27
Found the relay in the incorrect location per David's suggestion of bulletin PIT4835. I don't have a GM subscription, Alldata doesn't show the bulletin, found it on RepairProcedures.com including the all-important picture with the red X on the incorrect relay ...
2000 Oldsmobile Alero GLS 3.4L No Start VIN: 1G3NF12E8Y
Thanks to everyone who replied! The culprit turned out to be the electrical end of the ignition switch, not the tumbler. Thanks again. Trouble codes: U1000 (serial data lines).
2003 Saturn Vue 2.2L Starting VIN: 5GZCZ33D33
The problem was indeed like many suggested the bcm. The replies from techs were " check ground splice under driver's headlight, causes all kinds of issues, there is also a resistor in the same area for the drl that always rots away. If all these ok, bcm is the...
2007 Saturn Vue 3.5L Compressor VIN: 5GZCZ534X7
First of all I'd like to thank everyone for their help. I also want to mention the fans were working properly and I had cleaned the condenser fins.(Something I failed to mention in original post) The repair was what most had said. A bad compressor. Anothe...
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