Cable Actuated System
The P32/42 models use either a cable actuated or electric/automatic apply system. The cable actuated systems can either apply the rear brake shoes on the drum brake applications or a transmission mounted propeller shaft parking brake on rear disc brake applications. All electric/automatic apply systems use a transmission mounted propeller shaft parking brake.
The parking brake is not designed for use in the place of service brakes and should be applied only after the vehicle is brought to a complete stop, except in an emergency.
Pedal and Lever
The parking brake is applied by either a pedal or lever assembly. Motorhome models use a pedal assembly and commercial models use a lever assembly. The pedal assembly is foot-actuated and the lever assembly is hand-actuated.
Cable System
Coated parking brake cable assemblies are used on this vehicle. The wire strand is coated with a nylon material that slides through the plastic seals inside the conduit end fittings. This is for corrosion protection and reduced parking brake effort.
Notice: Handling of the parking brake cables during service requires extra care. Damage to the nylon coating reduces the corrosion protection. If the damaged area passes through the seal, increased parking brake effort could result. Avoid contacting the coating with sharp-edged tools, or the sharp surfaces of the vehicle underbody.
To prevent damage to the threaded parking brake adjusting rod when servicing the parking brake, the following is recommended:
| • | Before attempting to turn the adjusting yoke, clean the exposed threads on each side of the yoke. |
| • | Lubricate the threads of the adjusting rod with Lubriplate® GM P/N 1050109 or equivalent before turning the yoke. |
