Cluster issues after full flash

Big Block 88

Multiple choice muscle
Nov 3, 2008
4,665
0
36
38
Kansas when I am home
So alot of my options that I had thought failed have come back to life. Onstar and center rear view mirror works again, 6 disk changer works again. I guess the incorrect OS was affecting it??

The truck had its cluster replaced on the last injector swap, and I am thinking reflashed then. Since then truck has had check engine light on with a trans com issue and dad did tell me the glow plug code has been on since injector swap. Dealer said it needed glow plugs with all those miles they were just worn out.