I need some troubleshooting help on an WAMS upgrade I did in March of this year. Let me be clear that this is not a WAMS issue, but a GM issue.
I have 2015 Silverado that I upgraded to the digital cluster and CarPlay/Android Auto HMI Radio. I had great service and everything has been working fine.
Yesterday, I got into the truck and the 8” screen was black. There was no logo flashing up as typical on the cluster or the screen. The radio is not playing and the cluster states Audio Off. None of the USB ports are live. I have pulled the RDO fuse (to reset HMI) and also tried disconnecting the battery for 10+ minutes. No change.
I am trying to determine my next troubleshooting steps. I am planning to reconnect the HMI connector (to make sure it is not loose). I also have my old HMI, but I am unsure if I should try it.
I am open to next steps/thoughts.
Thanks,
Chip