Brake Caliper: Description and Operation

FRONT CALIPER
Front calipers on Saturn SUV vehicles are dual piston, sliding caliper units. They are fastened to the caliper support bracket with two bolts. Brake pressure, created in the master cylinder, acts equally on the caliper pistons and caliper body (in the bottom of the caliper bore). This causes the pistons to move outward (pushing inboard brake pad against the brake rotor) and caliper body to slide inward (pushing outboard brake pad against brake rotor), creating stopping force. (The front calipers are only serviced as an assembly).