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Professional Automotive Repair Technical Discussions for October 29, 2025 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2018 GMC Acadia SLT 3.6L MIL Lamp on, Reduced power mode VIN: 1GKKNSLS3J PCM powers and grounds were checked and ok, fuel pressure from main pump was checked and ok. I never figured out the root cause of this one, customer took vehicle to dealership. All I do know is dealer replaced HP pump again thinking we got a bad one, and this... Trouble codes: P0091 (Fuel pressure regulator low / short to ground), P163A. |
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