System Component Description

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The park brake system consists of the following:

Electronic Parking Brake Control Module (With J77): Electronically transfers park brake system apply input force to the park brake cable system. Refer to Electronic Parking Brake Description .
Park Brake Lever/Pedal Assembly (Without J77): Receives and transfers park brake system apply input force from driver to park brake cable system.
Park Brake Cables: Transfers input force, through park brake cable equalizer, to park brake apply lever.
Park Brake Cable Equalizer: Evenly distributes input force to both the left and right park brake units.
Park Brake Apply Lever: Multiplies and transfers input force to park brake actuator.
Park Brake Actuator/Adjuster: Uses multiplied input force from apply lever to expand park brake shoe toward the friction surface of the drum-in-hat portion of the rear brake rotor.
Threaded park brake actuators are also used to control clearance between the park brake shoe and the friction surface of the drum-in-hat portion of the rear brake rotor.
Park Brake Shoe: Applies mechanical output force from park brake actuator to friction surface of the drum-in-hat portion of the rear brake rotor.