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Professional Automotive Repair Technical Discussions for July 2, 2024 International Automotive Technicians' Network (iATN) - Members Only |
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| (Also Available: All, Asian, Chrysler, European, Ford, GM.) | ||
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Open Help Requests for GM
| Help Request | Answers | |
| 1991 Chevrolet Camaro Z28 5.0L Mechanical VIN: 1G1FP33FXM I'm hoping someone can help me with the timing specs for this old beast. There is not a sticker under the hood anymore. I have the timing set to 6 degrees before TDC with the brown wire disconnected. The problem I'm trying to diagnose is a hesitation or... |
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| 2008 Chevrolet Express 1500 4.3L No Start, Stall VIN: 1GCFG15X38 Vehicle intermittently starts and then dies after 1 second. Will persistently not restart for long periods. No theft light on dash flashing. Data in TCM all ok when dies, not disabling fuel. Power supply to injectors good , load tested. Injector control no... Trouble codes: P0615 (Starter relay control circuit), U0100 (Lost comm with ECM/pcm erratic), U0140 (Lost comm with BCM erratic) |
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| 2019 GMC Terrain Denali 2.0L Suspension VIN: 3GKALXEXXK Orignal problem was noise in both sides on rough road, replaced both front strut assembly's & sway bar links (moog) vehicle returned with pop/clunk noise in right side front, when accelarating hard or coming to stop hard, thought we had bad strut, replaced... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2010 Cadillac SRX Premium 3.0L MIL Lamp on VIN: 3GYFNFEY1A It was the ECM. I followed Anthony's suggestion on isolating the ground circuit from the ECM to make certain there wasn't an internal harness short to ground and found no problem there. The ECM was grounding the circuit all of the time even with the engine and... Trouble codes: P0443 (Evaporative Emission Control System Purge Control Valve Circuit Malfunction). |
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| 2016 Chevrolet Silverado 1500 LT 5.3L Vacuum pump or booster VIN: 3GCUKREC7G The customer has been using the pickup since June 15th. Have not heard of any problems with the brakes. What I found was that I was expecting to much from the vacuum pump system. Under normal braking conditions it worked just fine. I did try a new brake booste... |
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