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Prev Professional Automotive Repair Technical Discussions for January 23, 2013
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Open Help Requests for GM
Help Request Answers
1995 Buick Regal Custom 3.1L Fuel Pump VIN: 2G4WB52M9S
Fuel pump will not energize with key on, when you apply voltage to fuel pump test terminal, fuel pump is energized. Fuel pump will receive voltage thru oil pressure switch during extended crank times and vehicle eventually starts. After removing fuel pump rela...
1994 Chevrolet C1500 Cheyenne 5.7L no heat VIN: 2GCEC19KXR
This truck came in with no heat. customer stated heat stopped working when The belt broke and it over heated. I have replaced the t stat and the radiator and flushed the heater core. The truck gets heat in the shop but the longer i drive it the less heat i get...
1995 Chevrolet K1500 5.7L Brake Lights VIN: 2GCEK19K8S
Vehicle came in customer states brake lights stuck on. Verified complaint. Brake lights will shut off when "Stop/Haz" fuse in dash panel is pulled. Also noted is that when the brake pedal is pushed there is static that come through the radio speakers if the ra...
1997 Chevrolet K1500 5.7L Rear Brakes VIN: 1GCEK14R8V
Brake pedal goes to the floor. We can run the truck in the air in gear and can not make the rear wheels stop until the pedal hits the floor with quite a lot of pressure. Repair history since this vehicle came into our shop about a month ago. Replaced master c...
1998 Chevrolet Tahoe 5.7L transfer case control module VIN: 3GNEK18R6W
Is this clicking noise normal when you turn the key on or off. transfer case works properly in all modes. is there a problem I'm not seeing or is this normal?
1999 Chevrolet K1500 Suburban 5.7L Cuts out, VIN: 3GNFK16R1X
I have a question about the crankshaft sensor pattern. Specifically the voltage signal from the crank sensor. The original sensor had a 5 volt square waveform. The new Delco sensor has a 12 volt square waveform. This particular truck had no driveability sympto...
2003 Chevrolet Trailblazer North Face 4.2L ecm VIN: 1GNDT13S73
Okay after listn 2 the costumers complaint about the battary keeps draining, and that he blow a fuse and replaced it, i fond out that he had blown the main fuse n the engine fuse panal, the 125 max fuse, and had replaced it with a 175 amp max fuse, that was my...
2006 Chevrolet Impala LS 3.5L Tps VIN: 1N1JD32K66
Tough one for the GM guys. So this customer brought in this 2006 Impala LS (disregard the vin...it is not all correct...I am at home, not at work so it is a (K) motor, and it is a 3.5) This vehicle came in for its first tune up at 168,000. Changed plugs, wires...
2000 GMC Yukon XL 1500 SLT 5.3L draw VIN: 3GKEC16TXY
this thing has a 190 ma drain on battery, when removing the tbc fuse drain drops to 20 ma, have unplugged both vanity mirrors, rmeote control door lock reciever, ipc, all aftermarket accesories, when unplugging the inadvertent relay drian drops to 80 ma, unplu...
2002 GMC Yukon SLE 5.3L ABS module VIN: 1GKEK13Z42
after changing broken brake lines, I have not being able to get a good brake pedal on vehicle. bleed system several times and still cant get it to work. performed the ABS procedures with the scanner to bleed the system and still have same results. Now ABS and ...
2002 GMC Envoy SLE 4.2L Misfire VIN: 1GKDT13S52
Car came in for check engine light on and runs a little rough at idle. Put scan tool on and found p0303, pulled coil off checked plug swap plug and coil with different cylinder. No change. Still missing on cyl 3. Did compression test had 150 psi, cylinder leak... Trouble codes: P0303 (Misfire cyl 3)
2006 GMC W4500 Forward W4S042 5.2L Hesitation, Cuts out, Stall, Misfire, no throttle response VIN: J8DC4B1677
Thank you for taking the time to help me here. I don't do a lot of diesel work but this is a really good customer and I need to help him. The truck was purchased at auction in June of 2012 and has run pretty well for the 15K miles since the purchase. It has ha... Trouble codes: P0301, P0303
2007 Hummer H3 3.7L steering stablizer system VIN: 5GTDN13E17
Hey guys,thanks in advance for your help.Trying to run a flow chart test for C0710,Steering wheel position sensor but the chart doesn't make much sense.Went to Mitchel's diagnostic flow chart for this.Got to step 4 and things don't make sense.The chart says if...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Regal LS 3.8L Ipc VIN: 2G4WB55K72
2007 Cadillac SRX 3.6L Unknown VIN: 1GYEE63797
Thanks to all who helped! The right lower control arm was the source of the noise. We have recomended based on condition they both be replaced. Happy New Year to all- lets pray 2013 will be good for all! Greg and crew
1998 Chevrolet S10 LS 2.2L No Start VIN: 1GCCS1944W
Fixed it. Gordon [...] Ontario and Kevin from Michigan were the big winners in this mystery. We had a couple of days of sub-zero weather and the problem FINALLY occured for more than just a minute or so. Previous to this current cold snap we had removed and fro...
2006 Chevrolet Suburban 1500 Z71 5.3L cooling fans VIN: 1GNFK16Z96
OK guys thank you for the information. The vehicle has a blown head gasket. I can command the fans on with the scan tool, but when I unplug the coolant sensor the fans never come on. The engine bogs down really bad, but the fans don't come on. I'm figuring...
2006 Chevrolet Silverado 2500 HD LT 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCHK29U56
Leak down test confirmed leakage on multiple intake valves. I guess we assumed that it was a new issue relating to the previous repair. We removed the cylinder head again, lapped the valves, and all is good. It is now apparent that there was a misfire issue...
2009 Chevrolet HHR LT 2.2L engine VIN: 3GNCA23B69
Thanks for the feedback. Sorry if I wasted anyones time with my incomplete post. Being an independant shop we don't see new designs for 3 to 5 years down the road, and I was trying to get some field reports from those of you that have had that "great GM feelin...
2003 GMC Sierra 3500 SLE 6.6L oil pressure VIN: 1GTJK33103
I want to say thanks for all the replays I changed the oil and it was thin as water changed the oil oil pressure picked right up I asked them if they wanted to ck the inj for leaking they are going to take it to the sale thanks for the help
1995 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE55M8S
First of all, I would like to thank you for your responses!!! After all the thoughts on icm I decided to put one in...no luck! So, leaning on the PCM, (even though the odds of the second one having the same problem seem slim)I started to recheck all my wires b...
2002 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63B42
we found what was lealing was the plastic vac chamber inside the intake, part #[...] both discontinued and i could not find any parts.We sealed with an approved sealer but i have little hope that it will stay sealed. If anybody knows of any wh... Trouble codes: P0171, P0174.
2007 Saturn Outlook XR 3.6L Unknown VIN: 5GZER23767
i guess i made a mountain out of a hill. it was just motor mounts.
2008 Saturn Vue XR 3.6L MIL Lamp on VIN: 3GSDL63738
the customer decided to drive this way and keep up frequent oil changes, the previous owner had sludged up engine and the light would come on every day,now with a couple oil changes and cleaner you can drive a hundered miles or more without light coming on. st... Trouble codes: P0017.
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