Battery draw down in 6 days on 2007 Sierra 1500
 

My truck has a brand new battery and the charging circuit is working properly. It starts and runs fine if used all the time. When the truck sits 5-7 days the battery will be completely dead. It does with a jump fires right back up. Also the fuse for the rear view mirror and seatbelts will pop either right after being reinstalled or within a few hours of driving. Anyone have any good ideas? Thanks.