How to replace rear brakes in 2005GMC Sierra?

Jack up truck support it remove tire you should see the caliper,on the back side you will see two small bolts lossen the bolts remove it might require some prying support the caliper,check the rotor if has grooves in it it should be turned. use a c clamp to force the piston back in the caliper be careful of the rubber seal put the new pads on reinstall the caliper tighten the bolts start the truck pump the brakes a few times go back check for leaks if none put tire back on remove support lower to ground test drive