I have a 2017 Acadia Denali. I left the sunroof open in a pouring rain, It took out the entire dash, turn signals and radio, None of the console buttons work. What still works are:
backup camera
Navigation - picture only. I cannot adjust anything
heated and cooled front seats (haven't checked the back seats yet for this function)
front seat ceiling lights
garage door open button
electronic parking brake
lights

Anyone have any ideas on what parts were fried or what went wrong, the fix and potential cost to fix.

Thank you in advance for your responses.

I have a 2017 GMC Acadia Denali. I accidently left the sunroof open in pouring rain. The rain took out the dash, turn signals, radio and from panel buttons on the council and steering wheel buttons. Backup camera and Nav still work. But no buttons on Nav screen work.

The from dome lights, heated and cooled seats and exterior car lights and electronic parking brake still work.

Any ideas as to what the problem and fix is and potential cost?

Thank you in advance for any guidance.

The first step that I'd do for that would be to close all the windows and doors (and the sunroof) then turn the front and rear heaters on full blast for a half hour or maybe a little more. This would get any moisture good and hot and hopefully dry it out. Then see what still doesn't work and maybe do another round the next day.

Boilerplate: Make sure nothing alive is in the car when you do this. Secure your vehicle responsibly while doing this. Professional driver on a closed course. Results may vary. Past results are not indicative of future performance. Void where prohibited by law. Yada. Yada.

Merged duplicate threads. Post 1 started here, and post 2 and 3 came from a duplicate thread in the "Everything Electrical & Electronic" forum.