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Prev Professional Automotive Repair Technical Discussions for January 28, 2014
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Open Help Requests for GM
Help Request Answers
2005 Cadillac SRX 3.6L Misfire, MIL Lamp on VIN: 1GYEE63765
Good afternoon,This vehicle after driving about 1 mile stop and get a cup of coffee restart the car it will likey miss the check engine light will flash setting p0202 p0302 p0300 codes.The tech 2 scan tool injector comand pid will be 0 volts at this time for #... Trouble codes: P0202
2000 Chevrolet Silverado 1500 5.3L ignition VIN: 2GCEK19TXY
this chev. has a no start condition when the temp. gets below 20 has no fire.once temp. rises to 30 degrees it starts right up.will crank but no fire from coil packs.have scanned system everything shows normal.replaced crank sensor,checked ...
2002 Chevrolet Camaro 3.8L vibration VIN: 2G1FP22K32
Hi: this customer has a vibration when the engine is revved to higher engine rpms. Since the engine is a reman long block from an Iowa Chevrolet Dealer, could the problem be the vibration from the balance shaft timing being off? Possible motor mounts?
2004 Chevrolet Silverado 3500 8.1L pressure loss VIN: 1GCHK34G14
we have replaced steering box{leaking}hydro boost,all new lines.we have installed two factory gm pumps,also have performed the correct bleeding proceedure.I have checked the frontend for possible binding,made sure everything was free and well lubricated.The pr...
2007 Chevrolet Malibu LT 3.5L MIL Lamp on VIN: 1G1ZT58N27
freeze frame data shows sft2 16 lft2 20.It takes about 25 miles to set failure.Performed injector flow test,all injectors within 1 psi.I wanted to know if the problem was in the engine or pcm-wiring.Hooked up jumper leads to make bank 1 read off bank 2 sensor ... Trouble codes: P0174, C0561
2006 GMC Canyon SLE 2.8L Mechanical VIN: 1GTCS148X6
Replaced the cmp sensor cleared codes year later comes back same code,actuator is at zero and testing fine. Other causes were crankshaft balancer bolt loose or missing incorrect torque mis built or misaligned timing... Im scratching my head here because the el...
2008 GMC Savana 1500 5.3L Engine VIN: 1GTFH15458
The codes are as follows P2135- TPS switch a/b voltage correlation, P2101 Throttle actuator control motor, P0121 TPS/ switch a circuit range/ pert. problem. Alternator output jumps back and forth from 15 to 15.10. Any help would be great. Thanks, al
2008 Saturn Vue XR 3.6L brakes locking up VIN: 3GSCL53778
it gets code c131 did brake master found it leaking inside brake booster ,contaminated & replaced .problem still existlaced so we replaced abs valve & module.then replaced hoses bleed, problem still their.we just tried to bleed a final time & wen we were done ...

Fixes & Summaries for GM
Fix/Summary Answers
2007 Cadillac Escalade 6.2L parking assit VIN: 1GYFK63887
Checking system out 8 volt supply to each sensor found harness for sensor runs between bumper cover and bumper had open to number 4 sensor like it was pinched at one time and wire corroded out .repair wire abd system working.
2003 Chevrolet Silverado 1500 LS 5.3L MIL Lamp on
I replaced the throttle body assembly and both tps signals are the same.Cleared codes & roadtested an appears good.Truck had a slight stumble just off idle, that is gone too.Thanks for the info Trouble codes: P1516.
2010 Chevrolet Impala LT 3.5L rack and pinion VIN: 2G1WB5EK4A
Decide to take tape measure to body and sub frame.The reason for this is i loosely installed rack and everything was fine for a day .After tightening everything down with correct torque specs rack failed in less than a mile.After measuring found not only was s...
2006 Hummer H2 6.0L light on VIN: 5GRGN23U96
Vehicle fixed;Tanks to all that replied. it had an open on the wiring to the speed sensor right above the diff .John [...] made a good observation questioning if the code was coming back right away KOEO. That got me thinking found the problem really quick
2006 Pontiac G6 3.5L Sir VIN: 1G2ZG55846
Thank you for the replies. First the stereo work was not anything to do with the radio it was speaker changes. When we checked the communication lines with a labscope we had no waveform. My only guess at this point was the air bag module was shorting out but t...
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