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.Google+
Car Problem Reports
Cadillac DeVille Vacuum Brake Release Switch Can Fail
Cadillac DeVille Problem
Average Mileage: 140,020 mi (55,000 mi - 234,000 mi)
Visitor, 1990 Cadillac DeVille, 118,000 mi
Parking brake does not automatically release when shifted out of park.
Visitor, 1997 Cadillac DeVille, 87,000 mi
Parking g brake won't disengage automatically and cruise control won't work
Visitor, 1999 Cadillac DeVille, 110,000 mi
parked itwith the emergency brake on, went to move it and the brakes won't release I thought the brake pads were just corroded to the disc,but the cylinders won't retract
Visitor, 1996 Cadillac DeVille, 132,000 mi
still not repaired I just use park brake on extreme hills then use the manual release next to pedal-see owners manual
Visitor, 1994 Cadillac DeVille, 115,000 mi
When putting car in gear the parking brake will not release. The only way to release the brake is to manually pull on lever next to pedal.
Visitor, 1990 Cadillac DeVille, 55,000 mi
the emergency brake will not release when I put the car into drive.
Visitor, 1991 Cadillac DeVille, 152,000 mi
My parking brake does not release automatically when shifting form park.
Visitor, 1999 Cadillac DeVille, 130,286 mi
parking brake did not release