GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Brakes 🢒 Air Drums 🢒 Front Cam Brake Assembly Replacement

Removal Procedure
  1. Block the rear wheels.
  2. Drain the air reservoirs. Refer to Draining Reservoirs in Air Brakes.
  3. Raise and support the front axle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheel.

    5. Object Number: 201766 Size: SH
  5. Remove the brake drum. Refer to Brake Drum Replacement .
  6. Remove the hub assembly. Refer to Wheel Bearing Adjustment in Rear Drive Axle.
  7. Remove the air line from the front air brake chamber. Refer to Hose and Line Replacement - Nylon and Metal Compression in Air Brakes.
  8. Remove the wheel speed sensor, if equipped. Refer to Wheel Speed Sensor Replacement . Front Wheel Speed Sensor Replacement in Antilock Brakes System.
  9. Remove the bolts and the washers.
  10. Remove the front brake assembly from the knuckle.

Installation Procedure

    Object Number: 201766 Size: SH
  1. Install the front cam brake assembly to the knuckle.

    2. 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.

  2. Install the washers and the bolts.

    3. Tighten
    Tighten the front brake assembly bolts to 280 N·m (206 lb ft).

  3. Install the wheel speed sensor, if equipped. Refer to Front Wheel Speed Sensor Replacement .
  4. Install the air line to the front air brake chamber. Refer to Hose and Line Replacement - Nylon and Metal Compression in Air Brakes.
  5. Install the hub assembly. Refer to Rear Hub and Bearing Replacement in Rear Drive Axle.
  6. Install the brake drum. Refer to Brake Drum Replacement .
  7. Adjust the front wheel bearings, if needed. Refer to Rear Hub and Bearing Replacement .
  8. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheel.
  9. Remove the safety stands and lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  10. Start the engine.
  11. Charge the air system to the air compressor governor valve cut-out point.
  12. Check for the proper brake operation.
  13. Stop the engine.
  14. Apply the parking brake.
  15. Remove the wheel blocks.