Hi,
the BCM it was replaced by me in 2020 no water damage had new one cloned, ( from original GM OEM unit, GM flash a business in Missouri there was 2 blown fuses I got it taken care, codes/DTC are gone except U1520 faceplate . Radio, AC/heater controls work and light up now but stabil trak comes on u0121 is been there for years intermittent problem I was thinking. Maybe Poor electrical connection in the CAN bus circuit or ABS module, no rats or mice ever chewed up things/ wires, car is still in Greenville, SC area 158k on it, had it since bought with 11k so no rust or corrosion /salt not a issue. This is a weird problem maybe power assist steering control module? Or harness or wiring? That module is in a crappy spot under the car, Regardless thanks for the full system boot info I am still going to do that I never had the malibu discharged / hard system reboot, maybe Battery disconnected for a few hours that's it, or when replaced in 2022. Thanks,
Pat
Saturday, November 9th, 2024 AT 8:08 PM