Drum Brake Adjustment for GMC Truck Sonoma Pickup - 2WD 1998

The rear brakes must be adjusted after replacing the brake shoes.

1. Raise the vehicle and support the vehicle with proper safety stands. Refer to Lifting and Jacking the Vehicle in General Information.



2. Remove the knockout plugs (1) in the backing plate.
3. Rotate the adjuster screw until the wheel can just be turned by hand.

The brake lining drag should be equal at both wheels.

4. Loosen the adjusting screw 24 notches.

The brake linings should not drag after backing off the adjusting screw 12 notches. If you get heavy drag:

4.1.	Verify the parking brake is released and that no parking brake cable are binding.

4.2.	Loosen the equalizer nut on the park brake cables.

4.3.	If you still get heavy drag after loosening the equalizer nut, inspect the condition of the brake shoes and verify the proper positioning of the brake shoes. Refer to Brake Shoe Inspection and Brake Shoe Replacement .

5. Install an adjusting hole cover in the backing plate.
6. Inspect the park brake cable adjustment and perform the procedure when necessary. Refer to Park Brake Cable Service/Adjustment in Park Brake.
7. Remove the safety stands and lower the vehicle.