i know that you have to drill out the rivets that were on there from the factory but when you go to put them back on can you just set them on there like any other car. or do they have to be screwed on or something

 

The wheels and lug nuts will hold everything in place, G M bought them as an assembly to speed up the assembly line. PG.

 

Make sure you mark the location of the rotor with respect to the spindle before you remove as the rotor/spindle assy is machined together and if you don't index it back the way it was, the runout may be out of spec which can cause the calipers to pump air and result in spongy brakes.