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Professional Automotive Repair Technical Discussions for October 13, 2016 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1986 Chevrolet Corvette 5.7L Excessive Emissions, Poor Idle Quality VIN: 1G1YY6780G Engine has a erratic miss in it. Like a bad injector or something wrong with ignition system. Tried air flow meter and tested with vantage. Seemed to have fuzzy reading but probably because the way its running. Stuck a new one on and same problem. Then I rebui... |
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| 2000 Chevrolet K2500 LS 7.4L Hesitation, MIL Lamp on VIN: 4FTNW304N0 I received this truck and the complaint was that the air conditioning compressor clutch is always on even when a/c was not commanded. Test led me to the clutch relay always having a ground signal from the pcm. I replaced the pcm (factory gm reman) and programm... Trouble codes: P0325, P0171, P0300 (Random missfire) |
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| 2004 Chevrolet Impala LS 3.8L Hvac control VIN: 2G1WH52K24 Came in with no heat from left side ( dual zone manual )Remove left actuator and check if door moves . Can move door to heat position manually and get plenty of heat (left) Move lever from heat to cold and watch actuator (just hanging there)will not move. trie... |
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| 2009 Chevrolet Impala LS 3.5L Starting VIN: 2G1WB57K99 This car came in from the auction as a no start. It has no communication on the low speed bus line. I removed the splice pack and jumped from terminal a (data link connector) to each module separately and none of them will communicate with the scanner. There i... |
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| 2010 Chevrolet Aveo5 LS 1.6L Excessive Emissions, VIN: KL1TD6DE0A Hi guys I have this 2010 aveo would not pass nys inspection the problem is that the battery went dead so we replace the battery so the customer drove the car 200 miles would not set the evap and the 02 sensor no codes in the system it set the cat .02 heater an... |
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| 2008 GMC Sierra 1500 WT 5.3L transfer case VIN: 2GTEK19J78 Complaint was that the transfer case is shifting itself into 4LO in the time between when vehicle is shut off and when it is restarted intermittently. After sitting for a couple of hours at the shop here I went to bring it in and found that the 4LO indicator l... |
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| 2010 GMC Acadia SLT 3.6L sets code p2099 VIN: 1GKLRNED8A Only 1 code P2099. Vehicle runs fine.After clearing code takes two months to return.No exhaust leaks { that we can find } O2 sensors working correctly.It has been suggested by another shop to replace all six injectors and injectors have been updated by G.M. Ha... Trouble codes: P2099 |
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| 2013 GMC Sierra 3500 HD SLE 6.6L No Start VIN: 1GT523C81D Hey there diesel guys, need some help with this truck. I got it towed in about a week ago. truck has no/little fuel rail pressure. will not go above 1000psi. customer told me that he was pulling a light car/trailer uphill and went to turn on a/c and truck just... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2004 Buick Regal LS 3.8L Stall VIN: 2G4WB52K64 I installed a MAP sensor and it hasn't stalled in 25 miles of driving. I can't believe I missed the Map Sensor it was working according to the computer just not moving off 9 and didn't set a code Trouble codes: P0102 (testing and results). |
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| 2009 Chevrolet Uplander LS 3.9L no 2-1 downshift and no overdrive VIN: 1GNDU23169 The Uplander is now repaired and down the road. Many thanks to Mike, Joe, Bill, Timothy, Kevin and Craig who provided valuable insight for diagnosing the problem with this vehicle. I found the problem to be a faulty TCM. The following is an outline of the s... |
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| 2009 Chevrolet Silverado 1500 LT 5.3L Remote Vehicle Starting VIN: 3GCEC230X9 As suggested, I called GM SPS support and asked if this vehicle showed to ever have RVS installed. The answer was no, it doesn't have it. I talked the customer myself today, and after explaining that for whatever reason, the BCM is no longer programmed for RVS... |
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