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Professional Automotive Repair Technical Discussions for November 23, 2016 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1999 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy VIN: 1GNDT13W6X My fellow techs I have a brain buster here and I apologize for the long post but I want to cover everything. This vehicle came to us barely running. It runs on only a couple of cylinders. The explanation on the "tricked to run" and the most confusing part. Wh... Trouble codes: P0405 (EGR Sensor A Signal Short/Low) |
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| 2008 Chevrolet Trailblazer LT 4.2L right front VIN: 1GNDT13S18 This vehicle originally came into our shop for the Tire Pressure Monitoring Light being on. Our mechanic found both rear tires were low and aired them up, reset the system and in 18 miles the light came back on. Now he tested the system and found it was indica... |
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| 2013 Chevrolet Malibu LT 2.5L MIL Lamp on VIN: 1G11C5SAXD Car runs lean at idle LT 26 ST 16 cruise speed they improve a little LT 13 ST 9. I checked for a vacuum leak by spaying suspect areas with carb cleaner ST fuel trim never changed [I reset the trims before diagnois]. MAF reads 2.45 gr at idle.The only pid that ... Trouble codes: P0171 |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2011 Buick Regal CXL 2.0L radio locked VIN: W04GW5EV3B Tried another used radio that displayed NO VIN, when I first tried programming and then it said locked after programming. Dealer said it can't be done. Went on eBay and found services for unlocking gm radios under 2011 regal, but I entered my application under... |
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| 2006 Chevrolet Avalanche 1500 Z66 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEC12Z66 Thanks for your help. I think most of your answers are spot on. Although this not an afm equipped vehicle I believe the symptoms @ fluctuating vacuum gauge lead me to believe this is a lifter or cam problem. The owner is going to think about proceeding with t... Trouble codes: P0300. |
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| 2003 GMC C7500 Topkick C7C042 7.8L no forward gears VIN: 1GDJ7E1323 I would like to thank all of you that have replied especially John from Ohio. We did repair inside and outside harness after rear bearing repair and were left with temp sensor code. Tried unplugging harness, still no forward gears. Tested pump pressure, that w... |
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