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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 9, 2012
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Open Help Requests for GM
Help Request Answers
2004 Buick Park Avenue Ultra 3.8L Vses VIN: 1G4CU54154
This car has been fun. Once the steering wheel centers in the EBCM data, if you try to turn the car the VSES activates. When it first came in, it had a SWPS code stored and one of the other techs replaced it. Now the sensor passes the tech 2 test, but when you...
1990 Chevrolet Corvette 5.7L No Start, Poor Idle Quality, Surge, Stall VIN: 1G1YY2389L
hi everyone, the owner put his vette into storage and when it came back it was running rough like it had a camshaft installed. these cars arent known for being very peppy but this condition seems to have given this vehicle a new life because i could spinn the ...
1999 Chevrolet Silverado 1500 4.3L No Start, Stall VIN: 1GCEC14W8X
stalls and no start intermittently. When it wont start their is no spark from the coil and no injector puls there is RPM on the scanner. I load tested all wiring for the coil, coil driver, crank sensor.the fuel pressur is good. MAF reads good, ignition switch ...
1999 Chevrolet Silverado 1500 5.3L Misfire VIN: 2GCEK19T3X
vehicle has cold misfire on #7 cylinder. we put on intake gasket, plugs, wires, ck compression. had 175psi
2000 Chevrolet S10 4.3L Excessive Emissions, Poor Fuel Economy, Lack of power VIN: 1GCCS19W3Y
I really hope someone can help with this. This truck was brought to my shop for a transmission replacement. Following the replacement, we discovered during the test drive that the vehicle lacked any sort of power to the point of being nearly undriveable after...
2000 Chevrolet Corvette 5.7L Suspension VIN: 1G1YY22G1Y
Customer brought in this vehicle to investigate a churping noise when going over bumps. I isolated the noise on the right side of the vehicle. It does not matter what wheel hit the bump. I have check both front and rear suspension, ok. I thought it might be th...
2003 Chevrolet Silverado 2500 HD 6.6L Cooling Systems VIN: 1GCHK29103
Hi Techs I dont have alot of experiance on diesels ,have coolant leak just above lower hose attachment to engine it looks like a small weep hole antifreeze just running out like crazy ,checked water pump with mirror and doesnt seem to be coming from that area,...
2003 Chevrolet Impala LS 3.8L Engine temp VIN: 2G1WH55K63
Thank you all for your time! At my wits end with this one. Came in for temp gauge fluctuation. You could watch the gauge float on this one. Temp would go from 107c to 95c at a blink. With a scan tool watching the etc, It would be at 107 at idle just rev the...
2003 Chevrolet Silverado 2500 HD 6.6L High fuel pressure VIN: 1GCHK23113
I towed the truck into the shop do to fuel leaking from the engine compartment. Diesel was flowing from the injection pump. Replaced the pump and filter. Truck would not start for the longest time even after pumping the heck out of the fuel prime button. After... Trouble codes: P0193 (Fuel rail pressure sensor ckt. signal high), P0380 (Glow plug heater ckt. problem)
2004 Chevrolet Express 3500 6.0L power windows VIN: 1GAHG39424
Hello all, i have a van here that the drivers side window would not work but pass. side did, checked all fuses and circuits, looks good got new switch at napa hooked up , window moved maybe 6 inches then there was a pop noise from the switch then it did not wo...
2004 Chevrolet Colorado LS 2.8L MIL Lamp on VIN: 1GCCS19844
Codes p2101 P1562 both related to ETB I checked 5volt reference and have both KOEO. My wiring only shows the 8 wire connector at the ETB for a diagram it doesn't show any other real info is there more to testing the ETB? Modis shows TP 1% at KO. and 30-33%TP... Trouble codes: P2101 (Control Module Performance), P1516 (Tac Module Performance)
2005 Chevrolet Malibu LS 3.5L Cold Air On Start-Up VIN: 1G1ZT54855
This car will not get cold air from a/c for a few minutes when turning on a/c system, i monitored temp out vents and will hang around 62 degrees when 1st turned on, then after couple minutes will get colder 44 degrees. System seems to delay every time you firs...
2005 Chevrolet Equinox LT 3.4L Hvac VIN: 2CNDL73F15
Customer first complaint a/c not blowing cold at idle replaced expansion valve pressure ok and working normal .customer returned with same problem three weeks later a/c not blowing cold at idle .slight raise of rpms vent temp normal. Recheck pressure high and ...
2008 Chevrolet Avalanche LS 5.3L died out VIN: 3GNFK123X8
Died on customer, towed in. Starts & runs fine for us here. diagnosis seems to point to fuel pump flow control module internal problem. This is not the fuel pump in the tank, but a module mounted under the body that must sense fuel pressure and regulate the fu... Trouble codes: P0606, P069E
1998 GMC K3500 Sierra SL 5.7L Poor Idle Quality, Surge, Stall VIN: 1GTHK34R3W
Hello, We are battling with this 98 GMC 3500 pickup. Customer came in 2 weeks ago complaining of intermittent idle surge & occasional stall. We could not reproduce the problem at that time. Performed a throttle body service to clean out all deposits and sent h...
2001 GMC Sonoma SL 2.2L Evaparator VIN: 1GTCS19511
hello everyone got this gmc sonoma charged ac other day a day latter costumer calls no cooling back in shop no r134a in it. Check for leaks other day only leak found was high side service port replace't it and it held vacuum first time around. Now I have a bad...
2004 GMC Sierra 2500 HD SLE 6.6L loss of power VIN: 1GTHK23104
customer brought vehicle with p1093 and p1621 with loss of power when accelerating. identifix says that it could be the fuel filter or fuel injectors. perform injector balance with tech 2 and found to have cylinder number 4 not much responding when disabled. a...
1994 Pontiac Firebird Formula 5.7L Code 26 VIN: 2G2FV22P4R
The vehicle initally came in with the abs light on and a code 57. I found the BCM to be faulty and replaced it with a used one. Now I have a code 26 excessive left front wheel speed. I have installed 2 used BCMs a new hub/speed sensor,made a new harness from t...
2002 Pontiac Montana 3.4L No Start VIN: 1GMDX03E32
i have a montana with a no start.iam losing injector pulse.sometimes the security light is on and sometimes not.either way it still doesnt start.i have no pid on my scanner to tell me if the pcm is seing the key signal.i dont know if this has anything to do wi...
2002 Pontiac Sunfire SE 2.2L cluster, headlts & a/c VIN: 1G2JB124X2
Customer complaint is gauges in cluster flat line and all the idiot lights come on when headlts and a/c is turned on. Also the shift lock is intermittent. I did a test on the alternator output and it tested fine. I had 25 amps & 14 volts at idle. When I loaded...
2001 Saturn L200 2.2L Bcm VIN: 1G8JU52F71
Intermittently will not start, Starts and stalls, also occuring at the same time the dome light, door locks and shift lock are all inoperative.Condition may last only a few minutes or once was overnight. Acts like the theft deterrent system is shutting off fue...
2005 Saturn Vue 3.5L MIL Lamp on VIN: 5GZCZ53425
Hello to all and thanks in advance. This saturn was in for burnt exhaust valves and a new 02 a couple months ago, now its back with mil lamp on (was o2 problem but lost the code and Im afraid to drive to reset and possibly burn more valves). The front Lamda O2...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Park Avenue 3.8L Power window - Passenger and both rear windows VIN: 1G4CW52K2V
Diagnosing this one came down to old fashioned "parts swapping". I borrowed my mother's Park Avenue after lots of questions (she must still remember what I did to her Caprice wagon when I was 13). Both the Passenger Door Module and Rear Door Module failed. Wit...
1993 Cadillac DeVille 4.9L No Start VIN: 1G6CD53B0P
After all this time dealing with this nightmare it is still not fixed. Customer decided to drive it as is. He's been told that car will not start once/if it looses battery power. We have done everything as suggested here by people took the time to read this po... Trouble codes: 58 (Pass Key Fault).
1997 Chevrolet C1500 Cheyenne 4.3L engine VIN: 1GCEC19W1V
thanks to everyone who replied all advice was helpful. i ended up replacing fuel pump again. and found a cracked fuel line under upper intake. spyder assembly. ended up replacing fuel pump assem. twice with new ones.
2007 Chevrolet Tahoe LTZ 5.3L Misfire, MIL Lamp on VIN: 1GNFC13J07
Thanks for all the help, I did a tp relearn and a idle relearn with the tech II and the problem seams to be fixed. Trouble codes: P0121 (Tp sensor 1 performance).
2009 Pontiac Vibe 2.4L Reverse Engagement VIN: 5Y2SL67009
ended up replacing the clutch master cylinder on this one and bleeding the system retested and clutch/transmission operates properly
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