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Professional Automotive Repair Technical Discussions for September 24, 2015 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2002 Chevrolet Tahoe LS 5.3L Mechanical VIN: 1GNEK13T82 a/c problem low side has hight 55 to 60 hight side 250 to 300 rear air |
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| 2008 Chevrolet Silverado 1500 WT 4.3L Poor Idle Quality, Surge, Misfire VIN: 1GCEC19XX8 Hello and thanks. This truck came in barely running. First tech changed 4 o2s and cats. He said o2 were fixed lean. Changed ran a lot better. When cold to warming up has a little intake popping. When this was happening has little misfiring on cyl 2 so did comp... Trouble codes: P0507 (Idle too high), P0171 (Lean), P0174 (Lean), P0420 (Cat), P0430 (Cat) |
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| 1999 GMC K3500 Sierra SL 7.4L Misfire VIN: 1GDJK34J5X Thank you for reading this, I know your time is valuable. I have a 99 GMC with a 7.4l engine that is having a lot of misfires. The vehicle came in last month with misfires in cyl 3 and 5. It failed a combustion test and the spark plugs were wet with coolant so... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2005 Buick Rainier CXL Plus 5.3L MIL Lamp on VIN: 5GAET13M45 Thanks for the replies on this one, have not been able to get it back in yet. Customer has had no MIL and no symptoms since I posted. If & when it comes back I will look closely at fuel trims and freeze frame data, suspect a glitch in the TPS may be the caus... Trouble codes: P0121 (Tps), P0171 (lean), P0172 (lean), P0174 (rich), P0175 (rich). |
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| 2007 Chevrolet Tahoe LTZ 5.3L No Start VIN: 1GNFK13067 okay after much testing and not having(or being able to get)a known good cam/crank wave form, i tore the timing cover off and found one of the metal guide broke and went around crank gear and allowed it to jump a tooth!!! was just enough to throw it off but st... Trouble codes: P0573. |
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| 2010 Chevrolet Express 3500 4.8L No Start VIN: 1GC2GTBA2A Thanks, Voltage drops and a burnt up fuse panel hit the nail on the head. I pulled all the old fuses and relays out of the old panel for a look see and could see several fuses with evidence of heat distortion. Probably to physically small on a lot of circuits... |
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