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Professional Automotive Repair Technical Discussions for February 26, 2020 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2014 Cadillac ATS Performance 2.0L MIL Lamp on VIN: 1G6AJ5SX5E car came in with p0171 bank 1 lean found two bulletins first bulletin was to check intake bolt for being loose so i went ahead and smoked the intake system. no leaks found.second bulletin was to check the vac. system for the engine mounts checked withe a v... Trouble codes: P0171 |
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| 2002 Chevrolet Silverado 2500 HD 6.6L Computers VIN: 1GCHK29142 Vehicle was towed in with transfer case stuck in neutral. Removed the encoder motor and tried shifting the transfer case and couldnt get it out of neutral. Original tcase with almost 300k so makes sense. Replaced case and drove vehicle. Had it try to go in... |
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| 2011 GMC Yukon XL 1500 Denali 6.2L Engine VIN: 1GKS2MEF3B Loud consistent rattle from right rear of engine. Confirm oil pressure in specs; oil level and condition okay. Remove right valve cover and confirm rocker arm #6 is extremely loose. Crank vehicle and confirm very minimal push rod movement. Remove the rocke... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1999 Buick Century Custom 3.1L Misfire VIN: 2G4WS52JXX customer didnt want to put more time on the car but one thing is sure is that my problem is in this 3 things ignition module leaking intake gasket but whit 17 inchlbs steady at idle at not sure or the fact that my cylinder is a little bit low in this cyl thank... Trouble codes: P0300. |
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| 2012 Chevrolet Captiva Sport LT 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNAL3E52C Thanks everyone for the advice. As suggested I am leaning towards a injector issue such as clogged or mechanically failing but without any way to prove it we felt most comfortable sending this car to the dealership as the heads have to come off and that's an e... Trouble codes: P0300. |
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| 2008 GMC Savana 3500 6.0L MIL Lamp on, Oil psi gauge inop VIN: 1GTHG35K58 So this is a fleet van, the owner was not concerned enough to spend any more time/money on the repair. Just as a side note I tried to jumper the pigtail a 2nd time to see if gauge would peg; it did not. My next step was to do a pin test at the ECM ... when the... Trouble codes: P0523 (Oil psi sensor/switch voltage high). |
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| 2013 GMC Terrain Denali 3.6L Poor Idle Quality, Poor Idle Quality, Poor Idle Quality, Poor Idle Quality, Poor Idle Quality, Poor Idle Quality Thanks to all who helped out on this one. We found multiple intake valves not seating properly. The compression tests and leakdowns couldn't pick out any differences between the cylinders. We found it by closing the valves, filling the runners with seafoam,... Trouble codes: P0300. |
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