changing brakes and rotors
 

Ok so I have a 2001 pontiac sunfire gt and I go to start to change my brakes and rotors when I get stuck basically at the beginning. Does anybody know whether the bolt holding on the caliper uses a torx wrench or an allen key? and what size? It almost seems as tho its a torx and is caked with so much dirt and grime that it has the appearance of an allen key. Being i cant get my head back there, the best i could do is feel around and shove some clay in there to see what shape the impression was haha. If you have any ideas i'd appreciate it!