Forum Discussion
OnStar Light Red - Service Driver Assist Message - '25 Sierra 1500 Denali Ultimate
I had the same issue yesterday. It snowed and roads were wet with road film. Supercruise would not work. Same error messge. After reading comments I washed the truck focusing on the cameras and lidar sensors. Started and drove a few minutes, didn't go away. Shut off vehicle and went back an hour later, drove a few miles and supercruise was back. Thinking the sensors were covered in road film crud.
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