onefastsixsix

I have been searching on here and cant seem to find an answer to my problem. 99 Trans Am LS1 runs fine but one day the gauge cluster went out, the car still drove with no problems but when we shut it off we couldn't get it to start again. Changed the gauge fuse that was blown and the fuse blew again after a couple minutes of it running. Anyone know where to start looking for a problem?