Unfasten the bottom bolt ,lift the caliper up ( Its on a spring and hinge ) remove the pads . Screw the piston clockwise until it bottoms out , then lower the caliper and reinstall the lower bolt.
I need a daigram of the rear brakes being changed
front or rear
Are you asking how to??
You will need the tool to retract the calipers. The piston in the rear calipers have to be turned clockwise as you compress them back in.
Get some one else to do it
disc brakes - front and rear
Depend on what year cadillac you are talking about, and what model.
i need a diagram on how rear brakes are assembled
Check out the related video on how to change the rear brakes on a Saturn.
drum brakes
Conventional drum brakes.
To change the rear brakes on a 2005 Cadillac STS, start by lifting the rear of the vehicle and securing it on jack stands. Remove the rear wheels, then unbolt the brake caliper and slide it off the rotor. Replace the brake pads and reassemble the caliper, ensuring to compress the caliper piston if necessary. Finally, reattach the wheels, lower the vehicle, and pump the brakes before driving to ensure proper function.