Side Remote Mirrors 2001 Yukon XL

My problem has become worse with the passage of time. Mirrors worked great for a number of years. First problem, the mirrors would only go up and out using the inside switch. Second problem they would only go up using the inside switch. Now, they won't do anything. Can any of you tell me what could be the problem?:banghead:

Also, the seatbelt chime does not work anymore when sitting in the driverts side without the seatbelt on.:banghead: