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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 467 (Disc Brakes & Drum Brakes) >> Adjustments >> Rear Drum Brake Shoes

Rear Drum Brake Shoes

WARNING: This page is about a different car, the 2002 GMC Safari and 2002 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Rear brakes must be adjusted manually after replacing brake shoes.
  1. Raise and support vehicle.
  2. Remove brake drum.
  3. Using the Drum-To-Brake Shoe Clearance Gauge (J-21177-A) measure the inside diameter of the brake drum.
  4. Position the clearance gauge over the linings of the rear brake shoes.
  5. Turn the star wheel on the adjusting screw until there is about 0.020" (0.50 mm) clearance between the clearance gauge and shoe linings at their widest point.
  6. Using a punch and hammer, remove and discard the knockout plug in the backing plate which is directly behind the starwheel adjuster.
  7. Install brake drum.
  8. Tighten adjusting screw until light drag is present when the drum is rotated. The brake lining drag should be equal at both drums.
  9. Apply brake pedal 2 times in order to center the brake shoes on the locating pins.
  10. Check the drums again for light drag. Adjust as necessary.
  11. Install adjusting hole cover in the backing plate.
  12. Lower vehicle.
  13. Check parking brake adjustment. See PARKING BRAKE .
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