I have a 2012 Impala LT. I came home from vacation and my dash was out. My key fob doesn't work as well as the heater. I looked under the hood and my display fuse was blown. I put a new fuse in and it immediately blew. I have checked the dash and it appears to be fine. I can put a 30 amp fuse in and it works but I immediately smell a burning sensation. Any ideas on where to look. All of the grounds behind the dash are in tact. Thanks.