Yup, if you carefully grind just the cap away from the screw head, you'll be able to put vice grips on it and turn it out.

 

So hows this for crazy...

Driving to work in my 1500 today, truck spotters and dies. I grab the tow truck and take it to work for the grease monkeys to look at it. I get a call maybe an hour later saying its the cap and rotor. They threw one on and all was right with the world.

When I arrived home with my 1500 with the new cap and rotor, there's the new cap and rotor for my blazer. 20 mins later, I have both trucks up and running. I couldn't believe that both trucks were crippled by the same issue within 5 days of each other.

Everything is all back together and running great. Thanks for all your help. From now on if anything happens to any Chevy I ever own again, I'm putting a cap and rotor on before I even break out the scan tool.

 

Or just check with us and we'll refer you to post #2 Glad you got her going, and thanks for posting back.