GM Service Manual Online
For 1990-2009 cars only

Drum Brake Adjustment Leading/Trailing Drum Brakes

A manual adjustment of the rear drum brakes is required after replacing the rear linings.

  1. Remove the brake drum. Refer to Brake Drum Replacement .
  2. Turn the adjusting screw until the wheel can just be turned by hand.
  3. The brake drag should be equal at both wheels.
  4. Back off the adjusting screw 20 notches. Brakes should have no drag after the adjusting screw is backed off about 10 notches. If a heavy drag is still present, refer to Park Brake Cable Service/Adjustment .
  5. Check the parking brake adjustment. Refer to Park Brake Cable Service/Adjustment .

Drum Brake Adjustment Duo-Servo Drum Brakes

  1. Remove the adjusting hole cover in the backing plate.
  2. Turn the adjusting screw until the wheel can be turned by hand. The brake drag should be equal at both ends.
  3. Back off the adjusting screw 33 notches.
  4. Important: Brakes should have no drag after the screw has been backed off about 15 notches. If a heavy drag is present, refer to Parking Brake Shoe Replacement in Parking Brake.

  5. Install an adjusting hole cover in the backing plate.
  6. Check the parking brake adjustment. Refer to Park Brake Cable Service/Adjustment .