GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Brakes 🢒 Air Brakes 🢒 Hose and Line Replacement - Trailer Coupling

Removal Procedure
  1. Apply the parking brake.
  2. Block the wheels.
  3. Drain all the reservoirs. Refer to Air Brake Reservoir Draining.

    4. Object Number: 201579 Size: SH
  4. Remove the trailer air brake service coupling at the trailer air brake coupling stud.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 201579 Size: SH
  1. Install the trailer air brake coupling at the trailer air brake coupling stud.

    2. Tighten

        • Tighten the trailer air brake coupling to 35 N·m (26 lb ft).
        • Tighten the trailer air brake coupling stud nut to 45 N·m (33 lb ft).
  2. Start the engine.
  3. Charge the air system to the governor cut-out point.
  4. Use a soap solution in order to inspect for leaks.
  5. Leakage is not permissible.
  6. Remove the wheel blocks.