THE HEX BOLT SIZE IS 3/8 AND YOU CAN GET ONE AT ANY AUTO PARTS STORE FOR AROUND $5.00
Remove the wheel, remove the two caliper bolts and hang the caliper with a wire or bungee cord: you don't want any pressure on the brake hose. Then remove the two caliper carrier bolts and remove the carrier. The rotor just slides off after that.
My 2003 Cavalier uses a 3/8 hex key. It probably should be the same.
front caliper two bolts on back of caliper one on top one on bottom remove both bolts an pull caliper up an off rotor that's all
Remove wheel Re-install 2 lug bolts to hold rotor in place Remove flexible brake line Remove caliper mounting bolts Slide caliper off rotor
Remove the wheel, locate the Caliper. On the inner side there are 2 bolts going through the caliper, remove those (before removing use a flat head screwdriver to compress the caliper some) remove caliper. If you are removing the rotors remove the 2 large bolts on the caliper bracket.
Remove wheel Remove caliper mounting bolts Slide caliper off rotor Rotor should slide off hub Remove wheel Remove caliper mounting bolts Slide caliper off rotor Rotor should slide off hub
pull the wheel off, remove the two caliper bolts, remove the caliper and the rotor can be removed
I believe that needs a 3/8 Allen or some models, 7mm Allen.
T55
Most vehicles: it is secured by 2 mounting bolts Remove these and caliper should slide off rotor
Remove the two bolts and use a screwdriver against the hub and caliper.
It depends on the vehicle, some vehicles have star headed bolts, some have just regular hex head bolts different sizes, that hold the caliper over the rotor. All you have to do is remove the two bolts that hold the caliper, and then lift the caliper off of the rotor gently.