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Prev Professional Automotive Repair Technical Discussions for July 19, 2011
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Open Help Requests for GM
Help Request Answers
1995 Buick Roadmaster Estate Wagon 5.7L HVAC fan VIN: 1G4BR82P3S
Got some questions on this one. First, I've verified all the fuses are good, both underhood & inner panel. The control head reads "auto" and the fan speed indicator goes up & down like normal, but the fan does not run, and you can hear the a/c compressor kick ...
1994 Cadillac Eldorado 4.6L a/c blower motor VIN: 1G6EL12YOR
a/c fan, blower motor, burning up. Took blower assy. apart and found transisters cooked!
1999 Chevrolet Malibu 3.1L starts and dies VIN: 1G1ND52JOX
veh died, and would not start, just run an die,I've been in the mech field for yrs, and never have seen such a stubborn prob, lol. being I can't com with pcm, makes it really a prob, have tried other scanners too. does anybody have any ideas?
2002 Chevrolet Prizm 1.8L Stall VIN: 1Y1SK528X2
this crazy car will run fine until you turn any accessory on, lights a/c, etc... when you do, it will die immediately. it had cam and crank codes when recieved, i cleared them,and they havent returned, but the problem is the same. I suspect a bad ground somewh... Trouble codes: P0335, P0340
2004 Chevrolet Trailblazer LS 4.2L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GNDT13514
Thank you for looking at my post. I am completely stumped on this one. The truck came in with a complaint that the customer could not maintain freeway speed on any type of hill, low power at all speeds and a really rough running engine at times. I have been ab... Trouble codes: P0014, P0016
2004 Chevrolet Silverado 2500 HD 8.1L blend door VIN: 1GCHK23G24
Hello GM Techs, I really need your help on this one. We have a 2004 Silverado 8.1L, that will go hot all of a sudden out of the drivers side vents. It has a manual control head with hot and cold adjustments for driver and Passanger.(They slide up and down). Th...
2006 Chevrolet Avalanche 1500 LS 5.3L MIL Lamp on VIN: 3GNE922566
This truck came in ses light on had po449. With scanner commanded solenoid on/off, no response. Put test light across solenoid terminals and commanded solenoid on/off with scanner light went on/off with command.test for battery voltage on org. Wire, had batter... Trouble codes: P0449
2009 Chevrolet HHR LS 2.2L Air bag light VIN: 3GNCA53V79
This was subbed to me from a good body shop after collision repairs, the air bag light was on, I cleared codes, 1 came back for passenger pretensioners, the body shop replaced them, then the air bag light was flashing, I cleared the same code (B0022) and it ne...
2008 GMC Yukon SLT 5.3L Surge, Cuts out, Misfire VIN: 1GKFK130X8
Vehicle came in running fine, however customer complained of vehicle running rough and dying. Customer had vehicle at dealership where they replaced Fuel Volume balance module and reflash PCM. Problem is re-occuring, but is intermittent. Pulled codes and had P... Trouble codes: P0171, P0174, P0300
1994 Pontiac Firebird Formula 5.7L Fuel VIN: 2G2FV22PXR
This is one that is stumping everyone I know. '94 Firebird Formula LT1. The car had been sitting for 5 years or so when I rescued it. Mileage then was 103,000. I replaced the tank, sending unit, fuel filter and fuel pump because the tank was full of rust. The ...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac Fleetwood Brougham 5.7L Unknown VIN: 1G6DW52P6R
car is fixed!! we installed a new orifice tube and recharge the system with 1.4 lb . the spec is 1.75lb . my guess is that because it has aftermarket compressor ,condenser and drier the charge amount changed today is sunny 98 deg very humid and its idle at 50 ...
1997 Chevrolet K2500 6.5L power steering, power brakes VIN: 1GCGK29F7V
Hi everybody, thanks for all your suggestions, unfortunatly the customer has not wanted to find a fix for his problem, because as he says it only happens once in awhile. and i can't force him to fix it. until the laws are changed in BC thats all i can do. than...
2003 Chevrolet Silverado 2500 HD 6.0L Stall VIN: 1GCHK23U63
The problem with the truck was two-fold..Somebody put diesel in the tank & the throttle plates were gummed up ,about 1/32 thick..That was why it would not idle..I replaced the fuel pump but the pressure is still only 49 psi..I rechecked it with another guage,a...
2004 Hummer H1 6.5L Wide open throttle VIN: 137FA84374
well I had my wires crossed on the mileage. This truck has 16,000 miles. Most replies were that the injector pump is the problem. I agree. But when I realized the mileage I encouraged the customer to contact Hummer. He has and it looks like there may be some g... Trouble codes: P0251, P0219.
2002 Pontiac Firebird Trans Am 5.7L Clutch VIN: 2G2FV32G42
the other tech nvr changed the master cylider, replaces the master cylinder and now its fine.. thanks for all ur help.
2003 Saturn Vue 2.2L BCM Controlled Components VIN: 5GZCZ23D23
Faulty BCM was the cause of all the issues. It had no power steering (Electric), the DRL flashed on and off, locks were going nuts, and the odometer and cluster were working on and off. Put the new BCM in and had it reprogrammed by GM (which really only needed...
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