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Prev Professional Automotive Repair Technical Discussions for August 16, 2007
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Open Help Requests for GM
Help Request Answers
1992 Buick Century Special 3.3L Stall VIN: 1G4AG54N7N
We have seen this vehicle in several times with the same problem, engine will stall after driving it for about 30+ miles, vehicle will have to sit for approx 15 minutes before it will start up again (will crank but not start). We have not been able to duplicat...
1997 Buick LeSabre Custom 3.8L engine VIN: 1G4HP52K3V
antifreeze is in the cylinders. Looks like all the cylinders. Customer stated, Vehicle started misfiring, check engine light came on, now won't start. I went out to vehicle attempted to start. Would not turn over. Starter was trying to turn over engine but cou...
1997 Buick Park Avenue Ultra 3.8L pwr.wd.,drlcks.,mirrors, VIN: 1G4CU5214V
the good ole forsaken gram needs to open the windows here,car is hand me down from son,repairs and all. only the sunroof opens for atmspheric air pressure. there is voltage to the 10 gauge red wire to the door module and then also to the orange wire which goes...
1998 Buick Park Avenue 3.8L Mechanical VIN: 1G4CW52K5W
98 Park Avenue. Came in for brake repair, rear calipers, rotors and pads. Now I can't bleed the rear brakes, no fluid at the calipers. Also, the brake pedal is hard, not soft and spongy, as it should be. I have tried to manually bleed the brakes and also apply...
2003 Cadillac CTS 3.2L radio VIN: 1G6DM57N83
radio has very poor reception can at times get the local fm station other times nothing but static inspect connection for the radio and antenna module in rear of vehicle and inspect codes in all the systems that i can with the solus but cannot get into the rad...
1995 Chevrolet K2500 Cheyenne 7.4L Evapotator VIN: 1GCGK29N4S
A.C.evaporator ices over with blower motor on low speed at idle-set blower speed to second speed and evaporator thaws.Also ices over after extended drive.Have cleaned out debris from evaporator and condensor(dust,dirt,etc.).A.C.pressures are normal and compres...
1995 Chevrolet Astro CL 4.3L Excessive Emissions, MIL Lamp on VIN: 1GNEL19W6S
Came in with MIL on and complaint of little rough running. Found code 13, O2 open or shorted. Scanner shows .449 volts all the time, tap into O2 circuit and see .9 volts all the time. Verified data with another brand scanner. Disconnect O2 and voltage on circu... Trouble codes: 13 (O2 Open or shorted)
1998 Chevrolet K1500 Suburban LS 5.7L Coolant VIN: 3GNFK16R8W
Thanks in advance for any help you can give us!!! Customer has owned vehicle for 4 years and has been topping off the cooling system with small amounts of coolant for the duration with no signs of leaks. In the last month he found the radiator 1 1/2 gallons l...
1999 Chevrolet Blazer 4.3L Cuts out VIN: 1GNCT18W8X
Thank you for your time. This Blazer will buck & jerk when accelerating like when passing someone. Test drove monitoring data & found rpm's are reading 7500 when it acts up, & fells like the rev limiter is kicking in. All other data is normal. I can't find any...
2003 Chevrolet Suburban 2500 LS 6.0L RF Speaker VIN: 3GNGC26UX3
This vehicle has an alternator whine noise from the RF speaker at times. It does not occur with the engine off. It gets louder with engine RPM... If you hit a bump on the Right side especially, it may work perfectly, then maybe another bump it starts to whine....
1993 GMC G2500 Vandura 4.3L wipers VIN: 1GDEG25Z0P
This vehicle came in with a complaint that the wipers would come on driving down the road on their own. The belt was off of it because of an ac compressor that is trying to lock up, which was installed by another shop recently. I attempted to duplicate the pro...
1995 Pontiac Grand Prix SE 3.1L Starting VIN: 1G2WJ52M3S
This vehicle came in on the hook,no crank,or click.Went threw Mitchell flow chart and determined to be the anti-theft relay behind glove box,replaced but no change.I tested the 2 thin wires coming from ign switch,the resitance was the same as the key and was c...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Regal Custom 3.8L Starter VIN: 2G4WB52L6S
thanks to everyone I did measure the resistance and ohms and the white wire was infact a problom... i installed a resistor and put it all back together it starts properly however the security light is still on oh well it runs thanks a million to everyone
2001 Buick Regal LS 3.8L engine VIN: 2G4WB55K11
Thanks to all who replied.It turned out to be the ignition switch not feeding enough power to the circuit.
1994 Chevrolet K2500 5.7L No Power VIN: 1GCFK24H9R
Well we checked to make sure the timing mark on the harmonic balancer was correct by bringing up #1 Cylinder tdc and it was, I barrowed my brothers 95 Chev C2500 W/ 5.7L and swapped injectors and computer W/ Prom and still no power I did receive one reply from...
1998 Chevrolet Malibu 2.4L MIL Lamp on VIN: 1G1ND52T7W
Thanks to Dr. Kulbir, Tony & Don. Sometimes it is the most simplest thing. The radio! Replaced radio, so far so good! Thanks! Trouble codes: U1000 (Class 2 Serial Communication Problem).
1998 Chevrolet Malibu 2.4L Engine VIN: 1G1ND52T4W
Hello again. This is out the door and the needle doesn't get much above half on the gauge. I read all you replies and Randy, Joe and Brad were right on the money. To confirm it was the heater core or the "H" valve we bypassed the heater hoses and test drove ...
1999 Chevrolet C2500 5.7L lack of power VIN: 1GCGC24R0X
Thanks for all the replies, I did forget to put in my original tech mail that I had checked for exhaust back pressure, it was ok. come to find out my information told me that fuel pressure was suppose to be between 50-58 psi, indeed it's supposed to be 60+, fu...
2001 Chevrolet Malibu 3.1L rpms VIN: 1G1ND52JZ1
2001 Chevrolet Silverado 3500 6.0L cruise control VIN: 1GBJK34U81
well this truck is finally out of my hair. Turns out customers son had installed led brake/turn lamps in utilty bed. after it was fixed he said o yeah thats right about the time the cruise control quit working. On brake input wire that is b+ with brake depress...
2003 Chevrolet Venture LS 3.4L valve train VIN: 1GNDX03E63
First I want to thank those that responded all 8,some were concerned about the oil pressure, at 35 psi at idle you would think that some oil would make it to upper end, I didnt try at higher rpm as didnt want to further damage engine, I believe those that said...
1999 GMC K1500 Sierra SLE 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GTEK19R1X
I would like to thank everyone for all of the replies. What I found was engine oil getting into bank 2 sensor 1 HO2 sensor conector and shorting it out. So, I replaced with a new one and informed the customer about the oil leaks. On the misfire on cylinder #5 ... Trouble codes: P0300, P0305, P0154, P1153 (HO2 sensor insufficient switching Bank2 Sensor1), P0151.
1997 Pontiac Trans Sport 3.4L MIL Lamp on VIN: 1GMDX03E7V
Thanks for your replies. The vehicle is not fixed yet. Owner needed car back but will get back to me. some suggestions were maybe egr on back wards, wiring problem or ecm. I will update post when I get car back. thanks Trouble codes: P1401, P1655.
1997 Pontiac Grand Prix SE 3.8L compressor VIN: 1G2WJ52KXV
Sorry to mention we replaced the orfice,also. Installed all genuine parts,including manifold hose assy. Hope it stays fixed. Thanks to all whom responded.
2002 Pontiac Grand Am SE 3.4L MIL Lamp on
First off I would like to thank everyone that sent replies to this question. I had 2 replies that identified the fuse. 1 as the "emission related systems" and 1 as the "environmental reporting logistics systems" fuse. Not sure which 1 is right but if anyone el... Trouble codes: P0141, P0443, P0446.
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