This is done the same way you change any disc brake pad/rotor combo on any any vehicle. If you don't have a shop manual I suggest buying a Chiltons or Haynes manual for step by step instructions and for many pages and pictures to help.
The brake rotors are warped are out of round. Need to do a brake job and have the rotors turned are replaced. Be sure to install new pads and shoes.
$600-700 for new rotors and pads, front and rear.
Trailblazer enthusiasts will cover all the subjects including brake jobs at www.trailvoy.com
jack it up remove the wheel then the brake calipers then the rotors should slide off
Remove the tire and wheel from your 1994 Chevy. Remove the brake assembly. Tap on the rotors with a hammer or mallet. The rotors will slide off. Reverse the process to install the new rotors.
warped brake rotors, have them resurfaced.
Take off the tire, remove the brake caliper, and pull off the rotor.
All vehicles have brake pads.mine has disk brakes and the pads take about 10 minutes a piece to change.
Purchase a repair manual for that vehicle from your local auto parts store if you are not familiar with brake repair.
Change front brake rotors on a 1998 Hyundai Accent?
The new pads will last longer, work better, and be quieter if the rotors are resurfaced.
Change the brake rotors