Sierra 1500 4WD V8-5.3L VIN Z Flex Fuel (2005)
6. Important: When performing the following service procedure, ensure that the J21177-A is level before taking the measurement.
Using the J21177-A, adjust the brakes shoes until there is approximately 0.76 mm (0.030 inch) clearance between the rear brake shoes and the
rear brake drum.
7. Install the brake drum.
8. With heavy force, apply the brake pedal 2 times in order to center and adjust the brake shoes.
9. Inspect the drums again for light drag. If necessary, repeat the above steps for adjusting the brakes.
10. Lower the vehicle.
11. Adjust the park brake.
