Sensor Block: Removal
- Depressurize hydraulic accumulator by pumping the brake pedal a minimum of 25 times.
- Disconnect all electrical connections at the hydraulic unit and pump/motor assembly.
- Remove sensor block cover retaining bolt and remove sensor block cover. Take care not to damage the cover gasket during removal. See Fig 1
.
- Using fingers or a small screwdriver, disengage the locking tabs and disconnect the valve block connector (12-pin) from the sensor block.
- Disengage the reed block connector (marked "PUSH") by carefully pulling outward on the Orange connector body. The connector is partially retained by a plastic clip and will only move outward approximately 1/2 inch.
- Remove the 3 sensor block retaining bolts.
- Carefully disengage the sensor block pressure port from the booster/master cylinder assembly and remove the sensor block from car. The sensor block pressure port is sealed with an O-ring and extra care should be taken to prevent damage to the seal.
- Inspect sensor block pressure port O-ring for damage. Replace O-ring if cut or damaged.
- Inspect sensor block wiring and connector for proper retention and routing, or damage. Correct any damage or replace sensor block if damage cannot be corrected.
Courtesy of GENERAL MOTORS CORP.