Brake Drum Replacement for GMC Truck GMC P42 Commercial Chassis 1999

Construction of this drum and hub assembly does not allow replacement with the hub assembly installed on the vehicle.

1. Raise the vehicle on a hoist and support with suitable safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the hub and drum assembly. Refer to Hub and Drum Assembly Replacement in Rear Drive Axle.
3. Remove the retaining bolts, stud nuts, or wheel studs.
4. Separate the drum, hub, and oil deflector.
5. Press the wheel studs out of the drum.
6. Replace parts as necessary.

1. Connect the drum to the hub.
2. Align the drain holes.
3. Apply a light coating of sealing compound to the oil deflector contact surface.
4. Connect the oil deflector to the drum.
5. Install the retaining bolts, stud nuts, or wheel studs.
6. Press the wheel studs into the drum.