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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 22, 2009
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue Ultra 3.8L MIL Lamp on, p0171
replaced o2 this solved p0132, but p0171 popped back up?? o2 switches slow at idle(stays lean) and switches o.k. under load. Trouble codes: P0132 (o2 sensor), P0171 (system lean)
1996 Buick Regal 3.8L 3-4 upshift VIN: 2G4WB12K9T
Thank you for taking the time to read this. This Buick Regal is my personal car. At times, during a steady cruise on the X-way, the trans will just drop out of 4th gear. It doesn't do it all the time. Af first, you could feel the tcc release and see the tach j...
1998 Buick Century Custom 3.1L Starter VIN: 2G4S52M8W1
This car came in with the complaint of a funny noise after it starts. We camr to find that the starter kicks in when you just turn the ignition to the on position , not start. Happens almost every time. The starter relay is fired by the pcm and I suspect that ...
2001 Cadillac Seville STS 4.6L Steering Wheel Shake VIN: 1G6KY54931
Hey Cadi techs! I bought this car for my wife and it has been a nightmare! I have fixed a multitude of problems but have one remaining. Slight shake in steering wheel when moved off center at all speeds, seems to go away on center so looks to me to be in the p...
2005 Cadillac STS 4.6L remote start VIN: 1G6DC67A95
The remote start system does not work, the customer indicated that he never had a problem with the system before, then it just stopped working. Only related information he could give me was that the battery went dead, but couldn't tell me if that was also when...
1999 Chevrolet Express 3500 5.7L Torque Converter VIN: 1GB4G31R7X
Van/work van was brought in for stalling after engine was replaced by someone else. Engine was replaced due to engine started knocking and let go in the lower end. Customer states that it did not loose oil pressure or overheat but just started knocking and by ...
2001 Chevrolet S10 4.3L front differential pinion seal VIN: 1GCDT19W81
Hello and thanks in advance for your assistance. We have replaced this pinion seal several times now and I just wonder what else I could be missing. The most recent repair was just last week and I verified the oil was not coming through the splines, and it did...
2002 Chevrolet Silverado 1500 5.3L Drive-axles VIN: 2GCEK19T22
This vehicle came in complaining of a noise in the front end when in four wheel drive. When you turn in four wheel the front end binds up and a growling noise is heard. It won't make the noise on the hoist. The transfer case fluid is clean and ft and rear driv...
2004 Chevrolet Malibu LS 3.5L BCM / Radio VIN: 1G1ZT52854
I have performed drain tests and found that if I remove the 30 amp IBCM1 fuse under the hood the drain goes away, so I went further and have found the electrical drain goes away when I remove the 10 amp radio fuse from the BCM, now I am trying too pinpoint whe...
1997 GMC Safari SLT 4.3L power steering, VIN: 1GKEL19W8V
Vehicle was towed w/ very hard steering. Customer said that 4 pumps had been replaced at different shops. We replaced it cus they were junk yard units. Vehicle left in good running order, nice steering but 2 days later came back with same symptom, hard steerin...
2004 Pontiac Montana 3.4L dash lights VIN: 1GMDU03E14
No dimmable interior lighting working. Checked power and ground at switch using mitchell wiring diagram ,ok. no voltage at grey output so replaced switch,still ng. also has wire for step dim to radio and hvac,also not lighting up. Park lamps and dome lights ok...
2005 Pontiac Montana SV6 3.5L Unknown VIN: 1GMDV03LO5
This vehicle will not shut off until the key is pulled out of the ignition. I have installed an ignition switch but still does the same thing. The ignition switch feeds the BCM. The BCM is getting the signal from the ignition switch but the vehicle will not sh...
2005 Pontiac Vibe 1.8L timing chain VIN: 5Y2S163805
This vibe has two possibly related problems. First it suddenly developed a loud timing chain rattle type noise that is worst cold. It goes away at hot idle and above 4000 rpm. Also camshaft actuator is inop. Solenoid tests good and can here click when commandi...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Park Avenue 3.8L Surge, Stall VIN: 1G4CW52L3R
Well this one is fixed. After reading reply's on checking grounds, i checked and cleaned them again with no change. I also had reply's telling to clean the throttle body out/induction flush. Did upper intake flush, no change. Finally out of frustration, change... Trouble codes: P0705 (Transmission Range Switch).
1978 Chevrolet K20 Custom Deluxe 5.7L Poor Idle Quality, Hesitation VIN: CKL248Z165
It has been over a month now with with no more problems. All of your replies were very helpful in understanding what the main problems could have been. I can only assume it must have been something inside the carburetor causing its' behavior since the symptoms...
2006 Chevrolet Silverado 1500 HD LT 6.0L unknown VIN: 1GCHC23U16
thanks for the replies. after test driving the vehicle again with the customer and no noise, dry ball joints is the fix
2007 Chevrolet Avalanche LTZ 5.3L MIL Lamp on VIN: 3GNFK12347
I gave up and took it to Chevy. It was the ECM as we thought. Under warranty cost me nothing. Thanks for all the good replies and thanks to Sunrise Chevy. The tech that worked on it didnt find the problem at first but kept it overnight and it was stated on the... Trouble codes: P0056 (HO2S Heater Control Bank 2 Sensor 2), P0060 (HO2S Heater Resistance Bank 2 Sensor 2), P0161 (HO2S Heater Performance Bank 2 Sensor 2).
2002 Saturn L300 3.0L No Start VIN: 1G8JW54R02
Hello, techs thanks to all that replied. When installing a used pcm it needs to be reprogramed with the correct vin on the car and the security also needs to be reprogramed. I had to take this car to the saturn dealer and get it reflashed. Trouble codes: U2105.
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