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Prev Professional Automotive Repair Technical Discussions for July 10, 2007
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Open Help Requests for GM
Help Request Answers
2003 Buick LeSabre Custom 3.8L engine noise VIN: 1G4HP52K53
After vehicle is drivn for 15 to 20 minutes the engine starts to make a noise. almost like a bad pulley or air conditioning compressor. We took the belt off and the noise is still there. When you remove the oil filler cap there is high vacuum in the valve cove...
1984 Chevrolet Corvette 5.7L performance
A/C not cold enough. The door in heater box feels like it switches all the way from cold to hot. It is not retrofitted still charging with R-12 confirmed to be quality freon other R-12 jobs work great. Car calls for 2.75 lbs and I'm positive I have enough freo...
1988 Chevrolet Corvette 35th Anniversary Edition 5.7L Hard start VIN: 1G1YY2183J
Hi guys I have this corvette that has a hard start.It was setting a fuel pump relay code and it was only starting off of oil presure.Tested relay and found to be bad.Replaced the relay and now the relay turns the pump on like it was made to.start it up and the...
1989 Chevrolet S10 2.5L No Start VIN: 1GCBS14E8K
Hi all! I've got this s-10 pickup here that will not start when it's cold. If you vary the throttle you can get it to start, but it will not idle for the first thirty seconds. After that, the exhaust smells very rich. Here is my problem. I cannot get my Modis ...
1994 Chevrolet S10 2.2L Rev Limiter VIN: 1GCC1946R8
Hello everyone and thanks in advance for any and all help. Vehicle came in with busted rod through block, replaced with new engine. Customer came back and stated that when he goes over 4,000 rpm it acts like rev limiter is kicking in and vehicle will buck and ...
1996 Chevrolet Corvette 5.7L Clutch VIN: 1G1YY3254T
After 1000 miles since clutch replaced, car has come back with a hard / impossible to shift. I get the car in and you cant shift it into any gear with it running. Shut it off and its fine. Acts like your not pushing the pedal down enough. The weird thing is th...
1997 Chevrolet Malibu LS 3.1L ABS module VIN: 1G1NE52M5V
The ABS Light is on and I can't communicate with the ABS module I can not pull any codes or read data stream. I can communicate with the PCM. I checked fuses I have current to term. 4 pink wire at module and also at term 13 orng. at module. I tested serial dat...
1999 Chevrolet Monte Carlo Indianapolis 500 Pace Car 3.8L Stall VIN: 2G1WX12K3X
this car starts and stalls within 30 seconds, and will start again and again, and stall no codes, good spart and fuel pressure as it shuts down. any suggestions? thanx in advance, bill
2000 Chevrolet Prizm 1.8L unknown VIN: 1Y1SK5282Y
This a/c system leaks. It holds refrigerant for 2-4 weeks before the owner notices it is loosing efficiency. Charged with dye. Cannot find dye anywhere. Are these cars known for something like an evaporator. I removed the blower motor for a look inside the cas...
2002 Chevrolet Suburban 1500 LS 5.3L stuck on defrost VIN: 3GNFK16752
Customer brought in and said heater/ac is stuck on defrost codes BO248 and B3761 are current codes we can't get our mentor to commumicate with live data talked with a GM dealer and they said replace air mix actuator, we repalced and went through the recalibrat...
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on, LOW POWER MODE VIN: 1GNDT13S22
Help! I have a 2002 General Malfunction Trail Blazer that presented a week ago with a check engine light and a low power light on. The vehicle would not accelerate. Several codes were found all relating to the TAC module (Throttle body) I don't remember what t... Trouble codes: P1221 (tps performance/fuel pump circuit)
2003 Chevrolet Impala 3.4L tcc VIN: 2G1WF52E23
the engine light is on for the tcc performance, like couple others i've did i took the side cover off and replaced the solenoid, this on the light came back on same code po741 any help with this would be great thanks
1995 GMC K1500 Suburban SLE 5.7L Misfire, computer interferenc VIN: 1GKFK16K8S
This is my shop vehicle project. After hitting a moose last june I decided to have an episode of "overhaulin" in our own shop (no tv crew though :) ) I built a 383 stroker for it, along with new difs, tranny, custom fuel system etc, way too much to mention. ...
2001 GMC Yukon XL 1500 SLE 5.3L Dome Lamps VIN: 3GKEC16Z52
Ok Guys, Please help me!! I'm going crazy!! Our GS replaced the carpet in this 02 Yukon XL 1500 and when the customer picked up the vehicle, the dome light was not turning off. Not sure if it was that way when they brought it in. We have checked for short to g...
2002 GMC Envoy SLE 4.2L oil gauge goes to zero VIN: 1GKDT13S72
hi guys, i have this 02 envoy, oil gauge goes to zero at times, i reprogramed the ecm but still dose it, need to know if any of you guys ran to this problem and what was the fix, i thank all you guys for being a team and helping each other. thank you, fred
2003 GMC Yukon Denali 6.0L seat heater VIN: 1GKEK63U43
drivers seat heater does not stay on - reprogrammed and replaced seat module as per tsb. performed ohms test on seat heater grids.replace door module. swapped front seats and door switches - problem still exists. any thoughts?
2004 GMC Canyon SLE 3.5L inside mirror VIN: 1GTDT13614
this canyon wiil not change outside temp from celsius to fahrenheit on inside rearview mirror have followed owners manual and alldata to re-set no luck. os temp sensor test ok. it displays 0c zero c
2005 GMC Sierra 2500 HD SLE 6.6L chirping noise VIN: 1GTHK23225
when shutting off the vehicle or starting it up you will hear what sounds like two glass bottles hitting against each other. the sound is only present shortly after starting then vehicle and may last ten starts and shut off cycles on the hoist , then will go a...
2003 Oldsmobile Alero GL 3.4L intermitant no crank,dash light,power windows VIN: 1G3NL52E43
the vehicle will sometimes not crank or power windows,dash not work.this happen several times to customer.only 2 times to us.
1993 Pontiac Grand Am SE 2.3L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on VIN: 1G2NE113PM
Strange problem here. Engine idles very high when first started, then when it starts to warm up, it idles up, then cuts out and repeats constantly. Observing engine data, the injection pulse width goes way high (up to 50ms), then cuts right back to zero, and r... Trouble codes: 35 (IAC idle speed error)
1994 Pontiac Grand Am GT 3.1L MIL Lamp on VIN: 1G2NW55M4R
Car is setting light and codes only at cruise on freeway. Car runs flawlessly aside from customer stating trans. drops out of lockup occasionaly. Checked EGR system and no problem found with circuit or ports. Finally replaced with a good use EGR and same resul... Trouble codes: 80 (Trans. component slipping), 77 (EGR solonoid)
1996 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52T9T
Owner had taped up wires to starter and 3 ground wires, then connected battery and towed the vehicle to our shop. He could not remember where the wires went. I installed the starter, reconnected the battery. Vehicle would crank but not start. Hooked up scanner...
2001 Pontiac Bonneville SE 3.8L electric windows, door locks, int lights VIN: 1G2HX54K51
drivers window sometimes inop, other three windows inop at times also but not at same times as drivers window inop. door locks inop at times also but again not necessarily coinciding with window problems. interior light and door ajar light also comes on someti...
2001 Pontiac Aztek 3.4L Charging VIN: 3G7DA03E11
This car came in 2 weeks ago with a battery light on intermittently. We could not verify light on. Alternator was Very hot to touch in 15 seconds run time. We replace the alternator and every thing was ok. Alternator did not get hotter then engine. Shipped car...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Skylark Custom 3.1L Unknown
abtcm module was the problem P.S. thanks to everyone...
1998 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K5W
1992 Chevrolet Blazer Cheyenne 5.7L No Start, Poor Idle Quality, Misfire
Thank you for all the replies. I ended up putting the injector in from summit and the miss is gone. But wait, surgeing and stalling. Rechecked all components, repalced IAC valve as valve not control idle smoothly, reset timing to 8 degrees and surge gone. ...
1994 Chevrolet S10 4.3L engine VIN: 1GCCS14W35
took apart water pump and found fins to be corroded thank you guys for all the help
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
It was the MAF sensor and it runs perfect now! I took a chance and got a second reman one because I didnt want to raise the estimate. BTW, this car has a rev limiter that limits revs to 3500 RPM when in Park. Thanks to all respondents...you know who you are! D... Trouble codes: P0101 (Bad MAF System Performance), P0131 (O2 Low V. Bank 1 Sensor 1), P0151 (O2 Low V. Bank 2 Sensor1), P0300 (Misfires Detected).
2002 Chevrolet Express 1500 4.3L Misfire VIN: 1GCFG15W62
well i would like to thank all that replied, This vehicle has been a nighmare. It was sent to one of our other stores. As soon as i get the fix i will post it.
2003 Chevrolet Avalanche 1500 5.3L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 3GNEC13T33
after futher testing we found compression low on two cylinders. conveters on bank one had 10 psi back pressure and gm says should be .5 psi. conveters under warrenty so let chevy dealer replace them under warrenty ran better but customer wanted to trade truck ... Trouble codes: P0300.
2005 Chevrolet Classic 2.2L No Start VIN: 1G1ND52F25
vehicle has started up & cannot get problem to reacure! thanks for all the info my gess is body control modual!
1996 Oldsmobile 98 Regency Elite 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3CX52K2T
Hello to all, Well my nightmare is finally over. I would like to Thank everybody for the quick responses. And especially Thomas [...] for putting me in the right area. It ended up being the roller on the #6 exhaust lifter. It was pitted about ...
1999 Oldsmobile Silhouette Premiere 3.4L MIL Lamp on, hard shifts VIN: 1GHDX03E0X
Thanks for all the replys on this one. I have not been able to get them to bring van back yet. It is working with sensor jumped to 12volts. From what I learned about this system it has a fault system that will drop voltage if the ecu see high resistance. I thi... Trouble codes: P0336.
1995 Pontiac Bonneville SE 3.8L engine VIN: 1G2HX52K1S
First i would like to thank all the tech's for their help. We installed our scanner on the computer system and got a antitheft code out. We checked for a wiring problem and found the wires to the key were making contact sometimes and sometimes not making...
1997 Pontiac Grand Am SE 3.1L Poor Idle Quality VIN: 1G2NE52M4V
Hey guys thanks to the ones rereplied. Just as a guess I cleaned the ports of the EGR valve and re assembled. The concern was not there when the vehicle left. I called the customer 2 week after to see what was up, hesaid all is fine Thanks again
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