Hello my 1995 Vectra 31RQ with Chevy 454 7.4L and 4L80E tranny is blowing my ALT 20 amp fuse after driving 5 minutes then my dashboard doesn't work and the AUTO PARK light goes on and I go in limp mode. I changed the fuse and was able to drive for another 5 minutes then the same thing happened. I disabled the AUTO PARK thinking this was the problem but it failed again. Put back a new 20amp fuse and let idle, backed up and drove in the yard to park it and it doesn't blow the fuse. Why am I blowing my ALT 20amp fuse and what is connected to this fuse. Help needed