GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Chevy P42 Commercial Chassis 🢒 Brakes 🢒 Park Brake 🢒 Park Brake Indicator Always On

Checks

Action

DEFINITION: The AUTO PARK light stays on all the time or comes on frequently while driving.

Confirm that the parking brake is fully released if the AUTO PARK indicator stays on.

Turn the rear wheels and check for drag. If the park brake is not fully releasing, refer to Park Brake Will Not Release .

Check for a short in the light circuit.

Repair and/or replace the light circuit.

The AUTO PARK light comes on at intervals less than 15 minutes while driving, and the duration becomes shorter, leading to constant pump operation.
    • Refer to Park Brake Pump Motor Runs Continuously . Inspect for a system leak, the solenoid valve failed open, or the motor pressure switch failed closed.
    • Replace the faulty solenoid valve, the pressure switch, or repair the leak.

The pump is constantly running.

Refer to Park Brake Pump Motor Runs Continuously .