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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 28, 2010
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet Corvette 5.7L Misfire VIN: 1G1YY22P0R
the installation went well,( who designed this anyway),but now i noticed under easy acceleration it appears to be fine, however, under quick accel. it misfires at times and has some detonation or so called ping. of course, the customer says it never did this b...
1996 Chevrolet K1500 5.7L Drl'S VIN: 2GCEK19R7T
DRL'S don not work. Appears that the diode is out off the drl fuse. No voltage to that relay terminal. Anybody know where to find it? Thanks Jerry
1997 Chevrolet C1500 Suburban 5.7L MIL Lamp on VIN: 1GNEC13R1V
Hey guys, I know that its common to get cam\crank correlation after dist. has been pulled. but all my marks line up. On start up cam timing reads 46, then immediately drops to negative 16. When distributor is turned, cam timing does not change. Negative 16 be... Trouble codes: P1345 (camcrank correleation)
2001 Chevrolet Silverado 1500 LS 5.3L drops into neutral at cruising speed VIN: 2GCEK19T41
Trans drops into neutral during cruising speeds when this happens the speedometer acks like it is a tacometer and if you apply the brakes to pull over it takes alot of pettle presure to stop and the abs kick on which makes it harder to stop. Also when you shif...
1995 Oldsmobile 88 Royale 3.8L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G3HN52KXS
This vehicle will intermittantly cut out and stall,run bad and then run good for awhile.Seems to happen after about half an hour of running.We have replaced maf sensor twice,crank sensor,wires,O2 sensor,Lifted the upper plenum and replaced gaskets,checked inje... Trouble codes: P0101 (MAF sensor voltage low), P0131 (Oxygen sensor lean)
1989 Pontiac Firebird 5.0L No Start, MIL Lamp on VIN: 1G2FS21F7K
Can anyone confirm if I should be able to extract codes via Tech2 on this vehicle or is it just flash codes? Tech2 when plugged in will not power up. many thanks Andy [...]
2000 Pontiac Grand Am GT 3.4L Headlamps VIN: 1G2NW52E0Y
Car in our H.S. automotive program shop. L/H headlamp is dim. Both L/H H/L filaments are illuminated in low and high beam settings. R/H headlamp has normal operation. Ran continuity checks from junction (fuse) box to H/L bulb plug due to wire corrosion problem...
2001 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NF12T91
I'm missing something with this one and need help. Car came in a no start. Had multipule codes. At first was getting weak spark and weak injector pulse. Unable to check waveform (scope in for repair). After replacing everything known to man, I'm getting good s...
2001 Pontiac Grand Prix GT 3.8L Not Specified VIN: 1G2WP52K81
My future son in law bought a 2001 Pontiac gt 3800 series. V-6 Engine with auto 4 spd. trans. based on info provided by other members of the IATN having lots of experiance on this make on model. The engine seems to have come up as being bullet proof/Possible h...
2007 Pontiac G6 2.4L Stall VIN: 1G2ZF58BX7
First thanks for you help. I have a 2007 Pontiac G6 w/a 2.4. Vehicle came in with a cold stall at stops. Verified the concern, vehicle lurches then stall at stops, cold only. Pulled codes P0013 and P0014, (Exhaust camshaft actuator solenoid.) Perform the pinpo... Trouble codes: P0013, P0014

Fixes & Summaries for GM
Fix/Summary Answers
2004 Cadillac SRX 3.6L timing chains VIN: 1GYEE63724
After a closer inspection I found the teeth on the crank sprocket to be worn. It is hard to describe but I'll say they were not semetrical and looked like they curved to the right slightly. It looked like the chain was wearing into the drive side of the toot...
1988 Chevrolet Cavalier 2.0L No Start VIN: 1G1JC1114J
Thanks to all ! THE BEAST IS FIXED! Without my Snappy Scanner, working on this car was a bit harder than usual. The fix was indeed replacing the ignition module. Please read all the excellent replies that I received for this problem. I did replace the cranksha...
1999 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire VIN: 1G1JC5243X
Checked running compression on all cylinders and found all within spec except for cylinder number 2 which had 90psi. This was due to an incorrect insert for the spark plug threads installed previously. Repaired the insert and still had a misfire. Found head... Trouble codes: P0302.
2003 Chevrolet Silverado 2500 HD 6.0L steering pump VIN: 1GCHK29U73
The truck has been parked for about a week and a half. The owner is going to the Chevrolet dealership to have the hydroboost replaced.I was waiting to find out more of what they found before closing this, but will close it this way. After checking fluid flow f...
1992 Pontiac Grand Prix LE 3.1L No Start, Cuts out VIN: 1G2WJ14T6N
Thank for everyone a shorted injector was the problem client declined repair and paid for dissassembly only.
2004 Pontiac Bonneville SE 3.8L Cuts out, Stall VIN: 1G2HX52K84
Checked alternator with load test and was fine. This stalling was very sporadic and no real pattern in which to locate problem. Finally decided to actually pull the pcm and take a good look at pins. Upon removal of PCM connector I found the weatherpack seal ...
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