disc brakes are pretty simple.. you need to remove the caliper (probably two or three long bolts), unbolt the disk, remove the cotter pin, replace the disc, put a new pin in, bend it off, bolt it up. If you need to change the pads, they usually clip out. (metal clips.. like snaps). You'll need a c-clamp to collapse the caliper to make room for the thicker new pads. After you bolt the caliper back in place, you have to pump the brake a few times before the system is good to use. Good luck. BTW, the Aztec is ugly.How to change disc brakes 01 astek?
The Aztec is built on a Pontiac Montana Frame.
I couldn't find instructions for the Aztec, but should be very close to the following for the Montana.
http://www.autozone.com/servlet/UiBrokerHow to change disc brakes 01 astek?
If you mean ABS brakes those are a challenge. There is plenty of things involved but most importantly getting all the extra things off of it. Make sure you get rid of the brake line fluids. Also i would read the manuel to the car. It explains throughly how to change it, none the less someone on here to explain it to ya