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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 26, 2006
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Open Help Requests for GM
Help Request Answers
1993 Cadillac DeVille 4.9L Block VIN: 1GCD53B6P4
We have this old cadillac that is leaking water between the transaxle and block. Is there a freeze plug on the back of the block or do we have a hole burned in the block?
2001 Cadillac Seville SLS 4.6L Wheel Balance VIN: 1G6KS54Y01
Hello all, This Cadillac is a used vehicle we sold. It has a vibration at approx. 65 mph. Sometimes you can feel it in the steering wheel and then it will move to the seat. It has a harmonic feel to it, it comes and goes in waves. I balanced the tires (Hunter...
1986 Chevrolet S10 2.8L Engine VIN: 1GCCT14R2G
I hope somebody can help, at wits end. Engine vibrates badly at all RPM. Runs great other wise, no misses or backfiring, timing right on,good acceleration, no codes. I have changed the harmonic balancer and the flex plate twice,still the same. Have disconected...
1990 Chevrolet K1500 Cheyenne 4.3L Misfire, VIN: 1GCDK14ZOL
hello, i am showing a constant knock while watching data on a snap-on scanner. I tested the voltage signal going into the ECM from the ESC module and showed 9.04 volts, according to my specs the ESC should put out between 8-10 volts when there is no knock, mea...
1992 Chevrolet Camaro RS 5.0L radiator fan VIN: 1G1FP23E6N
Hi Guys! I need to inquire who would know what GM/AC Delco fan switch part numbers that I may use to actuate the radiator cooling fan at a lower temperature than this vehicle was designed for. I have this vehicle that runs so damn hot you can fry eggs under th...
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W8S
cust rep engine and sensors after getting codes from auto zone!!! "service engine soon" lite illuminates after two starts and stays on. auto xray sez veh not responding. checked data lines from computer to diag plug-continuity is good.pwr and gnds to computer ...
1998 Chevrolet Camaro 3.8L ABS Module VIN: 2G1FP22KOW
HELP Please!! Getting ready for to big race here in Indiana, if I could fix this Camaro ABS inop light it wouldn't be haunting me all weekend. ABS INOP light stays on all the time. No codes and no datastream. Checked all voltages (battery and ignition) and all...
2000 Chevrolet Suburban 1500 LT 5.3L ac pressure VIN: 3GNFK16T8Y
truck came in with major ac compressor lock up, replaced ac compressor, condensor, new reciever dryer, low side line to rear unit, and redesigned line from dryer to compressor. new low and high pressure switches. flushed all remaining lines, front and rear ev...
2003 Chevrolet Trailblazer LS 4.2L Hesitation VIN: 1GKDT13S13
Hey guys,this is the booses accountants vehicle.Only after sitting overnight and driving within the first mile,he claims it falls on its face.Major hesitation to the point he has to play with the accelerator to clear it out.After that there is no problem for t...
2001 GMC Yukon SLE 5.3L whistleing noise VIN: 1GKEC13T51
The customer brought the car in complaining of a whistleing noise when accelerating. After checking found the noise is coming from intake area. she stated that the noise started after she had the water pump replaced at the GMC dealer. So I replace the electron...
1998 Oldsmobile Aurora 4.0L Headlights VIN: 1G3GR62C6W
I noticed my wifes Aurora headlights flickering as the car was parked with keys out of the ignition. The car had been parked for 5 days and had not been started. It was the first hot day of the year. I opened the drivers door to have a look and heard a relay t...
1999 Pontiac Sunfire SE 2.2L a/c system VIN: 3G2JB5249X
no a/c opperation ,pressure is good, jump relay and compressor works and gets cold, computer is not grounding relay to turn system on, all controls are working. Tested wiring for computer etc , all good , test grounds and powers , all good, test high pressure ...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal GS 3.8L Stall VIN: 2G4WF5212X
This vehicle has been gone for a few weeks now Ill assume its fixed ! Since many suggested a bad crank sensor I scoped it out looked good and road tested some more but it wouldnt act up again for me so I took a swag at a crank sensor I drove 60 miles after and...
1997 Cadillac DeVille 4.6L No Start VIN: 1G6KD52Y6V
thanks to everyone who replied especially dan [...]. i had not unplugged the radio from the data circuit. he said that it was common in his experience that the radio goes bad and shorts the data circuit. i was skeptical because the radio would play. however w...
2000 Cadillac DeVille 4.6L Brake light switch VIN: 1G6KD54YXY
Thanks for all the replies. This customer has not yet returned with the vehicle. Also, we do not possess a Tech 2.
1997 Chevrolet Express 1500 5.7L driver power window VIN: 1GNFG15R6V
Thank you for all the input. To get the vehicle not to stick in autodown, a new power and ground supply need to be ran to the switch relayed from the battery. Simply running parallel wires did not fix the problem.
2000 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDU03EXY
This morning I replaced the camshaft sensor without removing the manifold. I took out the high pressure line only form the power steering pump. While rocking the pump and lift up rearside first, I could remove the power steering pump. Thank you everybody. Espe...
2001 Chevrolet Tahoe 5.3L Rear wiper motor VIN: 1GNEK13T91
Forgot to mention we did test and bypass latch switch. Since the vehicle was in we tested one of the new motors on another vehicle and it works fine. We've logged all of the voltages at the connector on the working vehicle. Customer lives a ways away and doesn...
2004 Chevrolet Silverado 1500 4.3L major leak VIN: 1GCEC14X64
This was second time on this vehicle. Alot of the same responses due to a common problem with the injectors and housings cracking due to unknown reasons. Sad part is i built in my own failure the bracket that holds the injectors from the bottom will fit BOTH w...
1996 GMC K1500 Sierra SL 5.7L Surge VIN: 1GTEK19R6T
The replys were great and man did I get alot of good information.Most said the the following look at timing,look at atf, look at cap, rotor, the fix was to correct the engine timing and retest drove. Thanks Mark Trouble codes: P0141.
2002 Oldsmobile Alero GL 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire VIN: 1G3NL52F62
Thanks for the replies, Jonny from Califonia was the closest with the coil housing idea. I think most replies did not realize that the coils & housing are an assembly on this vehicle and at one time GM serviced the whole assembly with a module as part of repla...
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