GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1997 🢒 GMC P62 Commercial Chassis 🢒 Brakes 🢒 Park Brake 🢒 Hydraulic Auto Apply Solenoid Valve

Removal Procedure

    Object Number: 29079 Size: SH
  1. Move the column shift lever to the P (Park) position.
  2. Remove the access panel.
  3. Disconnect the parking brake solenoid valve electrical connector.

    4. Important: Do not reuse the old fluid.

  4. Position a drain pan to catch the fluid that leaks out.
  5. Disconnect the hydraulic pipes and the hose from the solenoid valve and pump assembly.

    6. Object Number: 29080 Size: SH
  6. Remove the parking brake solenoid valve nuts, the washers, the bolts, the mounting spacer and the pipe fittings.
  7. Remove the parking brake solenoid valve.

Installation Procedure

    Important: When replacing any hydraulic components, the hydraulic system should be flushed with Dexron® IIE transmission fluid. This is to ensure that the hydraulic system is free of contaminants such as metal particles that may have been circulated through the system as a result of a component failure.


    Object Number: 29080 Size: SH
  1. Connect the hydraulic fittings to the solenoid valve.
  2. Install the parking brake solenoid valve.
  3. Install the parking brake solenoid valve mounting nuts, the washers, and the bolts.

    4. Tighten
    Tighten the parking brake solenoid valve mounting nuts to 13 N·m (115 lb in).

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.


    Object Number: 29079 Size: SH
  4. Connect the hydraulic pipes and the hose.

    5. Tighten
    Tighten the hydraulic pipe fittings to 16 N·m (12 lb ft).

  5. Connect the parking brake solenoid valve electrical connector.
  6. Install the access panel.

    7. Tighten
    Tighten the access panel fasteners to 13 N·m (10 lb ft).

  7. Cycle the system at least six times.
    8. 7.1. With the ignition switch ON, move the shift lever from P (Park) to N (Neutral).
    7.2. Check the fluid level. Refer to Checking and Adding Fluid .