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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 13, 2012
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Open Help Requests for GM
Help Request Answers
2004 Cadillac SRX 4.6L Misfire VIN: 1GYDE63A64
02 sen working properly
1994 Chevrolet Camaro Z28 5.7L No Start, No communication VIN: 2G1FP22P6R
This is a good one. Any help would be greatly appreciated. I have a 94 Camaro Z28 5.7L, A/T that has no spark, injector pulse and will not communicate with the PCM, ABS module or the DERM. The fuses have been checked more times than I can count. I have checked...
1997 Chevrolet K2500 Cheyenne 6.5L Poor Idle Quality, smokes VIN: 1GCGK29F4V
when cold truck only cycles glow plugs on for 7 seconds then off then on again after which if you try to start sometimes it will start with out touching throttle other times you have to crack throttle after it starts it blow white to almost greyish smoke out o...
1999 Chevrolet Tracker 2.0L Unknown VIN: 2CNBE18C4X
auto is like new. has terrible vibration while running. removed alt/ a/c belt goes away. can't figure out whats making it vibrate. no engine noise, no codes. give it a little gas it goes away. in gears it vibrates very bad. seems worse in reverse
2000 Chevrolet Suburban 1500 LT 5.3L Don"T Know VIN: 3GNFK16T2Y
Hello. This customer complains of a vibration like noise comming from vehicle. It occurs only on decel. So you accelerate and then you let off the gas, and for 2 seconds you hear a chatter and then it's gone. But you don't feel anything. So it only does it on ...
2001 Chevrolet Silverado 1500 4.8L Steering VIN: 2GCEK19V61
I have a chevy truck that will not steer with the wheels on the ground , I put a power steering pump in and was good for a few minutes and then back to hard steering put another pump in and just as bad replace the steering box no help , truck got worse to stee...
2004 Chevrolet C5500 Kodiak C5C042 6.6L limp mode VIN: 1GBE5C1114
hello to all members and hope all is well with everyone,got this c5500 that goes into limp mode right before 5th gear,the speedo dont work, so with the tech 2 hooked up and watching the speed sensor im doing 80 mph right before 5th gear so it governs it down,i...
1996 GMC C1500 Sierra SL 4.3L Rear brakes VIN: 1GTEC14W2T
Car came in with rear brakes not working and red brake light on.We checked brakes and they were recently done. No codes in system and no ABS light on. Pumped pedal and we have pressure from master but not out of ABS unit to rear brakes. (New single line to rea...
2002 Pontiac Montana 3.4L No Start VIN: 1GMDX13E82
this van has been hear severl times for no start condition. fuel pressure tested good. scoped all sensors . all withen specc. it dosent do this all the time. every time van comes in it starts right up. customer states that if he pumps gas pedal engine will sta...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac DeVille 4.6L Surge VIN: 1G6KD54Y7Y
hi guys i still have this car in my shop i went over this car i check the timing and found was off set up removed intake and inspect replaced with another when i removed the harness to iac engine stop surging replaced pcm and reprogrammed with latest software ...
1998 Chevrolet K1500 Cheyenne 5.7L No Start, Cuts out, Stall VIN: 1GCEK19R4W
Thanks for all the replies. It was the fuel injectors. 2 of them were leaking and flow rate/pattern on others was horrible. Installed the new style mpfi style injectors and it starts and runs with no issues. Thanks again for the help
2001 Chevrolet Suburban 1500 5.3L transmission VIN: 3GNFK16T41
I just got back from a [...] test drive and I think I can say this one is fixed.No noise and shifts great.I am also happy to say I heard back from Jasper and they confirmed the defective transfer case and will be paying a labor claim.Today must be me lucky day....
2003 Chevrolet Silverado 1500 5.3L Cuts out VIN: 1GCEK19T03
Thanks guys for all the help. The crank sensor is what the problem was. Running good for two weeks thanks again for all the help!!! Trouble codes: P1637 (Generator Turn-on Signal circuit out of Range).
2004 Chevrolet Silverado 1500 LS 5.3L Mode Actuator VIN: 2GCEK13T34
Hello everyone, Of coarse the system worked fine for me so I checked all the plugs and connectors including the ones behind the IP fuse box. Then I cleared the memories and let the actuators relearn and finally test drove the truck over the last few days, all ...
2005 Chevrolet Cobalt LS 2.2L No Start VIN: 1G1AL52F55
Ok I got a call from the customer today saying the dealer fixed it. They say they replaced the ICM and coil assembly (which I had already tried) at the tune of 700 bux. They didnt know what that metal could have been in the transmission and didn't think there ...
2008 Chevrolet Cobalt LT 2.2L air bag VIN: 1G1AL18F98
thanks to all who wrote in . what we found was a broken wire at the conector for the passenger dash air bag.fixed the wire all is well.
2011 Chevrolet Impala LT 3.5L seat adjustment VIN: 2G1WB5EKXB
Some replies said possible software or wiring issue, others said too much weight could damage seat modules. Most said dealer should cover it. I drove it down to the dealer this AM after finding nothing wrong myself. After taking the service manager for a test ...
1990 Oldsmobile Cutlass Cruiser SL 3.3L Poor Idle Quality VIN: 2G3AM84NXL
Thanks to everyone who replied. Injectors fixed the stumble issue. All six had too high resistenc and partially clogged. Learned vehicle sat in afield for a while and owner decided to put some money in it to trade in for different vehicle. Now vehicle has plen...
1997 Pontiac Grand Am SE 3.1L Hesitation VIN: 1G2NE52M2V
vehicle started running good for several days, what we noticed is when ever you hit a large pothole timing will retard and vehicle runs poorly. Several miles later runs good again, did not fix vehicle will post fix if we ever find it.
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