GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1997 🢒 GMC P62 Commercial Chassis 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Combination Valve Description

Removal Procedure

Important

    • The combination valve is not repairable and must be replaced as an assembly.
    • Do not let brake fluid contact any painted surface.

    Object Number: 30786 Size: SH
  1. Remove the hydraulic pipes from the combination valve.

    2. Plug the pipes to prevent the loss of fluid or the entrance of dirt.

  2. Disconnect the electrical connector from the warning switch.
  3. Remove the nuts, bolts, and washers.
  4. Remove the combination valve.

Installation Procedure

    Object Number: 30786 Size: SH
  1. Install the combination valve.
  2. Install the bolts, nuts, and washers.

    3. Tighten
    Tighten the nuts to 30 N·m (22 lb ft).

  3. Connect the electrical connector to the warning switch.
  4. Connect the hydraulic pipes to the combination valve.
  5. Bleed the brake system. Refer to Bleeding the Brake Hydraulic System.