You can use a small drift to tap it loose OR drill it out.
eat it
To access the rotor, remove the tire and brake caliper. There will be a cap protecting the bolt that holds the rotor onto the spindle. Removing the cap, located in the center of the rotor (on the spindle, not the rotor itself) will allow you to get access to the bolt. Removing that bolt frees the rotor from the spindle.
There are two 10mm tapped holes in the rotor. Use a 10mm bolt in EACH hole, and alternate turning one bolt, then the other to "pry" the rotor from the hub.
remove the wheel and take off the two bolt the bolt the brake caliper and the rotor should just slide off. Remember to release the e-brake before trying to slide it off, if it is hung up it's because of the e-brake shoes that are behind the rotor or is just surface rust and with a little penetrating lube and a rubber malet it will come free.
remove the hex bolt on the rotor and give it a smack with a mallet
remove the brake caliper and rotor then you will see three star head bolts remove those and the hole spindle will come out[you may have to persuade it with a hammer]then bolt on new one and your done
If the head is striped and a socket or wrench will no longer grip the bolt you can get a set of bolt extractors at any local auto parts store...they will dig into the bolt head so you can remove it...just make sure to get a new bolt or brake hardware kit while your at the parts store.
"How to replace rotor" 1. Jack the car up and secure the car properly with jack stand. 2. Remove the tire and place is it out of the way. 3. Remove the caliper bolts with GM caliper bolt remover socket. Plus a 3/8 ratchet. Place the bolt somewhere you will not loose them. A butter tub works great because you can put a mild solvent in it. 4. Pull the caliper off the rotor and place it out of the way. Do not let the caliper hang by the brake line. It will cause damage to the line. 5. It your has a bolt holding the rotor on you have to remover the cottor pin which if you clean all the grease off the bolt it will be very easy to see. If so you need to get a pair of needle nose or channel locks. Bend the end of the cottor pin back to where it is flat to the other peice so that it will be easy to remove. Grab the end of the cotter pin with needle nose and stick the point of the needle nose in the end of the cotter pin and pry it out. Then grab it with the channel locks and pull it out. 6. Get a socket that fits the bolt and the 3/8 ratchet and remover the bolt. After that the rotor should slide off. TIP: Good advise is to also replace the brake pads good or not. The wear on the brake pad is uneven and can damage the new rotor. 7. If you look inside you will see a bearing take it out, clean it off and look to see if you see blue on it. If you do that means the bearing has been over heated. The bearing needs to be replaced. If you have to replace the bearing you need to put high heat bearing grease in your hand (a big glob). Then push the bearing at an angle across the grease until you see the gease ooze out of the needles around the bearings. Then put alittle around the bearing. Do that to the inner and outer bearing. When you replace the rotor the races should already be pressed into the rotor. After that put a good film on the spindle which is the shaft the rotor came off of. Put the bearings in the rotor and place it back on the spindle. Bolt it back down with the old bolt and put a new cottor pin back in it. 8. Remover the cap to the master cylinder under the hood ( where you fill the brake fluid). 9. Grab the brake caliper and place an old brake pad back in it where the caliper piston it located. Then get you a c-clamp put in exactly in the center of the brake piston and slowly tighten it until the piston is fully depressed. If you don't do this the caliper will not fit back on the rotor with pad in it. When depressing the piston air is pumped back out of the master cylinder. That is why it is important to remover the cap. If you don't you can blow seal in the master cylinder. 10. With the brake pads in the caliper and seated properly slide the caliper back on the rotor. TIP: Before put caliper back on this is a good time to examine the caliper and brake lines. Replace as needed! 11. Examine the caliper bolts and check for any worn threads. If the bolts are good put them in the caliper and tighten down tightly. 12. Get in the car with the cap it the master cylinder still off and slowly push the brake pad to the floor. The brake pedal should be very loose and go amost or all the way to the floor. Keep slowly pressing and slowly letting off the brake all the way until the brake pedal becomes stiff. 13. Check brake flood and black seal inside. After that put the cap back on. 14. Remove the jack stand and put the tire back on. 15. Road test the vehicle no hard braking until brake and rotor are worn in. DIFFICULTY LEVEL: 2
You must remove the brake rotor or hub and punch out the broken bolt inwards, then press a new bolt in from the same direction.
First block the tires before the vehicle is jacked up. Second remove the tire and then remove the caliber and it take a three quarters inch socket to remove the bolt from center of rotor loosen the bolt remove the rotor and put the new one on.
replace line and caliper , very cheap . then bleed brakes and go.
The Rotor has a small bolt that holds the Rotor on the shaft. Did you Loosen this bolt?