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Prev Professional Automotive Repair Technical Discussions for May 14, 2013
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Open Help Requests for GM
Help Request Answers
1997 Cadillac DeVille Concours 4.6L high idle VIN: 1G6KF5295V
High idle. TPS jumping around a good 1/10 volt (at idle or engine off) I assume this is what is causing the problem. Using a Tech2 the at idle reading bounces from yes to no constantly. I cannot even do a IAC control because it says its not at idle, unless i u...
1992 Chevrolet Camaro Z28 Heritage Edition 5.7L Starting
We have a 92 camaro.Hotter out side the more it is effected.If you drive for miles and stop for gas etc.Come back out and car will not turn over.If you jump from another car it will start or from a jump box it will start.Or if you let it set for 25 to 30 min i...
2002 Chevrolet Tracker 2.0L MIL Lamp on VIN: 2CNBJ13C72
vehicle came in for state insp and oil service, young tech noticed bad brakes, axle, and 2 tires, but failed to realize the MIL lamp did not light in bulb test. aarrrggh! Cut to the chase... mil bulb burned out (how many hrs "on" would that take?) Three codes ... Trouble codes: P0335, P0131 (O2 sensor sig low B1S1), P0442 (Evap Small leak)
2005 Chevrolet Silverado 2500 HD 6.6L Poor Idle Quality, Misfire, Black smoke VIN: 1GCHK23225
Customer had black smoke and runs rough previously and requested all injectors to be replaced. It might have helped the smoke some but i dont remember it being totally gone, although he was happy. On ford diesels black smoke isusually more of an EGr issue and ...
2005 Chevrolet Trailblazer LS 4.2L Blower motor electronic resistor block VIN: 1GNET16SX5
Vehicle has been back three times now with only high speed working. Each time I have found diode on control module to have failed. Replace module and find all to work normally. I am looking for sugestions as to what to test to see what is damaging these module...
2006 Chevrolet Equinox LT 3.4L Cooling Systems VIN: 2CNDL63F86
Thanks up for for any help, I have this 06 Equinox with the 3.4 that has coolant in the cylinders. Vehicle overheated, customer stated that for several days before the engine ran rough for a few minutes when first started. I filled cooling system with water & ...
2006 Chevrolet Avalanche 1500 LS 5.3L acuating on drive
truck came to me with the abs acuating on left turns,would not acellerate in turn,found right sensor dropping out,replaced hub. helped for turn hesitation ,still had straght accelleration hesitation(dead throttle -electronic type)checked abs pumpturns on on ev...
2007 Chevrolet Cobalt LT 2.2L MIL Lamp on VIN: 1G1AL55F97
Hello Guys, I replaced the engine for a dead cylinder on this cobalt. Now I'm getting a po411 which is telling me I have a flow issue with the air pump. After inspection for obstructions I replaced the air control valve selenoid. The code came right back. The ... Trouble codes: P0411
1990 GMC S15 High Sierra 2.5L Cuts out, Stall VIN: 1GTBS14E5L
When cranking vehicle the single tbi injector pulses on cranking and vehicle starts but as soon as you release key into run posistion the injector stops working and even though car starts it runs out of fuel shortly there after. If I ground the Blue (INJECTOR ... Trouble codes: 34 (low voltage to map)
2002 GMC Envoy SLE 4.2L Surge VIN: 1GKDT13S32
Now has same code and i believe that the actuator is stopped up at the screen, my question is on this model is there a special tool to replace the actuator or is it simply remove and replace change the oil and filter reset computer, also this has intermittent ... Trouble codes: P0014 (Cam accuator problem), P1345 (Cam crk corlation)

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet Corvette 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, Stall VIN: 1G1YY22G4V
First let me start out by appoligizing for being a complete idiot and wasting everyone's time. Sometimes the simple things cost us dearly. This car has had a supercharger added to it. I left that out of the equation because I had looked at all the plumbing and...
1997 Chevrolet C1500 Silverado 5.7L timing cover? VIN: EHA735JSNK
Modified the timing cover and ripped the seal kit of it and used some really good rtv and and let it set for 24 hours and all is good now. Next time I'll buy a new cover from the dealer no more dorman timing covers for me. That guys for all your help.
2006 Chevrolet Impala LT 3.5L Highway steering VIN: 2G1WT58K86
Well guys, customer took vehicle and is planning on trading it in. Everything checked out good. No loose suspension or steering. Told customer steering rack may fix issue but wasn't going to be 100% sure on it. Thanks for all the input.
2006 Chevrolet Trailblazer LT 5.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNES13M56
The primary problem the vehicle came in for was poor driveability and multiple misfires. That was rectified by replacing the converter on the right side. It was an education to find that simply removing an oxygen sensor was not enough to allow the proper flow ... Trouble codes: P0016 (p0341-), P0341.
2009 Chevrolet Malibu LS 2.4L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G1ZG57B79
thanks to all! turns out the manifold was cracked due to cat being stopped up. also needed an upstream o2 sensor to fix fuel trims hence it now runs like a scalded dog. Trouble codes: P0011, P0013, P0014, P0101, P0300, P0420.
1999 GMC Yukon SLT 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEK13R5X
thanks for all the replies, the compression loss issue we narrowed down to rings losing compression at the top of cylinder, vehicle held good compression at the bottom of the cylinder. customer declined further repair at this time. Trouble codes: P0302 (2 misfire).
2000 GMC Sierra 1500 SL 4.3L Starting VIN: 1GTEK14W4Y
Thank you all so much.Yes all fuses are good.As many suggested it was module problems.The pcm and bcm both quit when the battery blew up.Was looking for one thing and changed bcm first them pcm.Only when both were changed did it allow the security to relearn a...
2009 Saturn Vue XR 3.6L steering VIN: 3GSCL53719
my apologies for the late close. Most replies suggested that the rack was causing the binding. I also agreed and replaced the rack. when finished, the vehicle had almost NO power assist whatsoever. at this time we decided to replace the pump as well. New pump/...
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