VE SS no radio and a/c always on

[GEN4GM]

I think that's your problem, the head unit has failed, and the HVAC system has gone to its default settings.
This happened to my S2 Redline when the IQ failed.
Not sure about the S1's, if the Entertaiment unit also contains the CAN bus network 'router'.

Wait and see what other members recommend.

Cheers bud! Fixed I picked up another head unit today and fitted it. Of coarse I’m getting the security lock out for radio until such time I get it programmed with my vin. But all other functions restored awesome! Thanks.