GM Automotive Technicians Technical Discussion and Fixes for Jul 31, 2012 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	2004 Buick LeSabre Limited 3.8L Rear Air Shocks VIN: 1G4HR54K74 This vehicle has Electronic Level Control rear suspension. Air shocks. We replaced the rear air shocks due to leaking. We replaced them with AC Delco shocks. Then we had a clunk from the shocks over bumps. We noticed the top portion of the air shock was sittin...	View
	1991 Cadillac DeVille 4.9L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G6CD53B2M Vehicle was brought into town by a used car dealer. When first brought to my shop engine had a rough idle and surge. Found 2 injectors not spraying properly, egr valve leaking vaccum and plugs fouled. Injectors, egr valve & plugs were replaced and remainging i...	View
	1988 Chevrolet C1500 Cheyenne 5.0L engine VIN: 1GCDC14HXJ here is one for u old school guys, got this truck that i am having trouble with. for some reason i can not get timing set correctly, at least i think so. i disconnect timing wire set to zero and reconnect, then timing advances to about 30deg. should it advance...	View
	1992 Chevrolet P30 7.4L Hydraulics VIN: 1GBKP37N3N Units disc brakes lock up after about twenty minutes of driving and then unit has to set for about thirty to forty five minutes and once calipers release unit can be driven with no problem for a considerable distance (around 15-20 miles) and nothing goes wrong...	View
	1997 Chevrolet S10 2.2L MIL Lamp on The truck sat in airport parking lot for four days. When the cust returned it had a dead battery and when he tryed to jump it would not start just cranked over! when I got it replaced battery four years old! turned on the key the fuel pump just ran and would n... Trouble codes: P0342, P1602	View
	1998 Chevrolet Tracker 1.6L high idle/timing VIN: 2CNBJ1867W This is a real brain buster. Originally arrived with a driveability: no power/barely runs. We confirmed vehicle drove, but topped out at about 10 mph. To make a long story short we discovered the motor to be a japanese crate motor and the old engine distributo...	View
	2002 Chevrolet Tracker 2.0L battery draw VIN: 2CNBJ13C12 FIRST TIME HELP REQUEST!!! no driving problems whatsoever,no check engine light, battery goes dead over night. The main relay clicks like crazy, if you ground the pcm ground side, it stops but then the EGR vlave clicks under the hood, along with other sensors ...	View
	2004 Chevrolet Blazer LS 4.3L ABS & Brake lights VIN: 1GNCT18XX4 Vehicle came in with both Brake and ABS lights going on and off when driving over 5MPH. Found history fault for RF WSS. Replaced RF bearing and no change---Un-plugged both front sensors and problem still present, ABS light will come on but then both will begin...	View
	1993 GMC P3500 6.2L Turn Signal VIN: J8DC4B1K1P Vehicle has no turn-signals or hazards when running or key in run position with engine off. Hazards work when key is turn to Acc postion. Wiring diagrams difficult to locate. Plugged in a new switch assembly, did not work. Anyone know off hand what my problem ...	View
	2006 GMC Sierra 2500 HD SLT 6.6L Unknown VIN: 1GTHK23D96 This Duramax is leaking oil at the EGR valve. 20,000 miles ago the dealer replaced the EGR motor for a leak and recommended removing the K&N air intake. Now the engine is leaking at the EGR again, but does not appear to be coming from the motor. I would like t...	View
	2007 GMC Canyon WT 2.9L Crankshaft Bearing VIN: 1GTCS14927 After timing chain tensioner replacement,vehicle still setting P0017. Customer informed us that another shop replaced Cam Actuator Solenoid (Twice with OE unit) and found screen missing on the original actuator. Yes in hindsight we should have replaced the cam...	View
	2007 Pontiac G6 GT 3.9L any forward gear VIN: 1G2ZH35147 Vehicle will only work in reverse. No forward movement. I can go to manual shift and it works perfectly. There are 2 fuses for tcm in the underhood fuse block but they are both good. It appears that it does not have a range selector switch at the trans. I woul...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	2008 Buick Enclave CXL 3.6L Hesitation, Poor Fuel Economy VIN: 5GAEV23728 Thanks for all the help, i can not tell you what the problem was because the ''used car lot'' does not want to put any more money it in. i was going to check the timing next. i feel it is off, my reasoning is because i checked every thing else out with not pr...	16
	1955 Chevrolet Bel Air 3.8L Starting VIN: C55T186464 WOW so many replys.Special thanks to Robert who scaned his old motor manual and sent it to me.As soon as i seen the wiring diag i was able to wire it properly.As so many sugested it was wired wrong because cust had removed starter but in his words it worked gr...	42
	1996 Chevrolet Impala SS 5.7L Oil Pressure VIN: 1G1BL52PXT Well thanks for all the suggestions. First i was not the first tech to take this apart so i never saw the original gasket which from the dealer is a metal gasket. The dorman kit we have been using to replace the gasket was a paper/cork type gasket. As you gues...	14
	2002 Chevrolet Avalanche 1500 5.3L Lock Cylinder VIN: 3GNEK13TX2 THANKS TO EVERYONE THAT HELP ESPECIALLY TO CARLY AND ANDREW. I DISCONNECT THE IGNITION SWITCH (ELECTRICAL) AND INSPECT; AND IT SPIN BACK AND FORTH NICELY. I TURN THE LOCK MODULE HOUSING GEAR; IT WILL NOT TURN BACK TO THE OFF POSITION. I DECIDE TO PULL THE L...	6

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