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Professional Automotive Repair Technical Discussions for April 20, 2017 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2006 Chevrolet Silverado 1500 HD LT 6.0L MIL Lamp on VIN: 1GCGK13U56 Vehicle came in with a misfire on Cylinder #7. Found a bad spark plug and ignition coil. R & R the parts. Truck runs great. Road tested the truck and upon accel CEL started flashing but no misfire felt. Scanner shows Cyl 7 as a dead misfire. Yet the truck feel... Trouble codes: P1380 (Abs Rough Road), P0300 (Random Misfire Detected) |
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| 2004 GMC Sierra 1500 SLE 5.3L monitors VIN: 2GTEK19T14 Thank you for your help. This truck will not pass the catalyst, or Evap. monitors. Also it will pass the O2 sensor monitor, both heater and performance, and then when you park the vehicle overnight they both go back to not passed. I am suspecting a PCM problem... |
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| 2004 Pontiac Montana 3.4L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1GMDX13E54 Vehicle will intermittently cut out/buck when driving steady or accelerating. I watched the waveform on the scanner and saw glitches on the crank sensor behind the crank pulley and the cam sensor. I replaced them both with OEM parts and also inspected the wiri... Trouble codes: P0336 |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1993 Chevrolet K2500 Cheyenne 6.5L No Start VIN: 1GCGK24F8P removed injector line, no fuel at all. removed pump cover again and crank car over. weight retainer does not move , pump locked down.send pump back to rebuilder and they replaced head again. all is well. thanks for all the help. |
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| 2000 GMC Yukon SLT 5.3L Stall VIN: 1GKEK13V3Y This truck is not fixed but I am sure it is a bad security module in the column. We do not get any security light in the dash unless the key is out and the door is opened which is normal. I have 3 scan tools and none of them will communicate with the security ... |
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| 2014 GMC Sierra 2500 HD SLE 6.6L No Throttle VIN: 1GT120C89E Thanks everyone for responding it was in fact the brake switch that was causing the problem but it got a bit more complicated than that. The truck was a prior salvage and apparently someone was on the brake really hard when they wrecked it and it bent the fire... |
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