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Prev Professional Automotive Repair Technical Discussions for August 18, 2014
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Open Help Requests for GM
Help Request Answers
2009 Buick Enclave CXL 3.6L Misfire VIN: 5GAER23D19
We have watched the pulse width on the scanner for all 6 cylinders and have very little difference in them. The "fly swatter" coil on plug tester shows all 6 cylinders firing. The misfire stops counting as soon as you touch the throttle. We tried propane enric... Trouble codes: P0302
1998 Chevrolet Cavalier 2.2L abs/srs VIN: 3G1JC5249W
No communication with abs module or air bag module. Abs and red brake light on. unplugged instrument cluster, then able to communicate with abs and airbag module. Replaced cluster and established communication with both modules. Shortly after no communication ...
2008 Chevrolet Silverado 1500 WT 5.3L oil pressure VIN: 3GCEK13358
This engine starts with 60psi and drops to 5 after running down the road 1 mile.Turn off engine restart and oil pressure is at 40 psi and will drop again in a minute or two of driving.Setting still it takes a few more minutes and the oil pressure will drop to ...
2012 Chevrolet Express 3500 LT 6.0L Curtain Air Bags VIN: 1GAZG1FGXC
Vehicle is driven at high altitude 30 degree area on a dirt road daily. We suspect wiring, however don't believe a short to ground would deploy bags. Should we replace harness, would that explain the erratic performance (B0090) from the roll over sensor and th...
2007 GMC Sierra 1500 Classic SL 4.8L Misfire, MIL Lamp on VIN: 3GTEK14V67
Hello All this one has been awful. The vehicle came in on the hook customer said it was running a little hot , oil light came on and he didn't think there was an issue. He kept driving it, check engine light started flashing a few minutes later of driving the ... Trouble codes: P0300
2001 Pontiac Aztek 3.4L MIL Lamp on VIN: 3G7DA03E01
Vehicle came in with P0420 stored. Freeze frame indicating code set at idle. Scan data shows rear o2 mimicking front o2 at idle. Engine at 2500RPM shows rear O2 oscillating between 60mv-150mv(fairly steady). My concern is the LTFT I am seeing is as high as -30... Trouble codes: P0420

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet Corvette 5.7L No Start VIN: 1G1YY22P4R
The shop I am checking this vehicle for is in the process of moving to a new building so I don't think they will have the time to finish this 'vette' before I have to close this post. Besides the fact it was driven into the shop and is now a no start,. it has...
2008 Chevrolet HHR SS 2.0L Poor Idle Quality, Surge, MIL Lamp on VIN: 3GNCA63X98
Thank You Techs!! Yes this is the poster child job! We agree on replacing the engine but customer has to many medical bills to afford it. Jimmy from Georgia & Mike from Virginia and I agree engine must have proper oil pressure & flow. Rattle of timing tension... Trouble codes: P0016 (Ckp to cmp correlation problem), P0089 (Fuel pressure regulator performance).
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