Message Center

does anyone have any ideas as to why my message senter would just up and quit? About two days ago it was working just fine. I have had the truck to the mechanics a few times for some other issues. The only one that has been dash related is that the parking brake light doesn't work. They are still trying to figure the parking brake out, but now they have this new problem. I just bought this truck (99 Sierra Z71 SLE) used about a week ago and it has been nothing but a headache. The only good thing so far is that the dealer is paying for all the repairs. Some insight on the message center quitting would be really helpful though.

LMK

Thanks