[groque1]

All I need is the harness? Will an SS or higher trim harness fit my HMI? Do I need a new programmed HMI?

[groque1]

Originally Posted by Nitro66215

The best thing is to review the wiring diagram. I don't know if they changed it between 17 and 18. Doubtful.

I’ll check it out. All I need is the harness? Will an 8” display harness fit my OEM HMI? Do I need a new programmed HMI?

[Nitro66215]

Originally Posted by groque1

I’ll check it out. All I need is the harness? Will an 8” display harness fit my OEM HMI? Do I need a new programmed HMI?

You're digging up the past that I have no memory of and would have to research. I do not own any GM products anymore due to their poor service. The documentation I provided originally is all that is left.