Forum Discussion
Error message in DIC shows "Service Driver Assist System"
I have a 2026 Sierra 1500 Denali and have the same issues. I noticed my Onstar "On" button had a red light instead of green. After much research, I discovered I could reboot the system by holding that "On" button for 15 seconds. During the reboot process, the light will flash green for about 10 seconds then turn solid green and everything works plus no "Service Driver Assist" light. BTW, I also notice my radio does not work when the light is red, so I believe it is an antenna issue. This fix (at least for me) is only temporary, and the light comes back to red after the vehicle has been turned off for a while (overnight, etc.). I am going through additional trouble shooting with Onstar now, but everything suggested has already been tried so waiting on their next reply.
Rest assured, William, our team is still here and ready to assist further. Please follow up with our latest communication in private messaging so we can move forward. We hope to hear from you again soon.
Rest assured, William, our team is still here and ready to assist further. Please follow up with our latest communication in private messaging so we can move forward. We hope to hear from you again soon.