The parking brake may not release automatically due to a failed vacuum switch or actuator. Our technicians tell us that if vacuum is supplied to the actuator when the transmission is in gear, the vacuum switch is functioning and replacing the actuator should correct this concern.
The Parking Brake May Not Automatically Release on Cadillac DTS
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Use parking brake while parking on a hill.. could not release the brake for over an hour.
RELEASED EMERGENCY BRAKE MANUALLY AND LOST MOST OF MY BRAKING ABILITY WITH WARNING LIGHTS FOR BRAKES AND TRACTION CONTROL COMING ON TO GET SERVICED