Parking Brake Shoe Replacement 9 x 3

Caution: Refer to Brake Dust Caution in the Preface section.

1. Remove the drum (1). Refer to Propeller Shaft Parking Brake Drum Replacement .
2. Remove the return springs (3, 6).
3. Remove the parking brake support plate (2).
4. Remove the linings (3).
5. Inspect the linings for contamination.
6. Inspect the linings for excessive wear. The minimum lining thickness is 1.52 mm (0.60 in).
7. Replace the linings, if necessary.

Always replace the linings as a set.

8. Inspect the return springs (3) and the anchor spring (6). The return springs and the anchor spring should not have a loss of tension or openings in the coils.
9. Replace the return springs (4) and the anchor spring (6) , if necessary.
10. Inspect the shoe webs where there is contact with the camshaft (5) and park brake support plate (2).
11. Replace the linings if the shoe webs are severely worn.
12. Inspect the support plate for damage, distortion and corrosion.
13. Remove corrosion from the contact surfaces with a fine emery cloth.
14. Replace the support plate if there is damage or distortion.

1. Apply a thin coat of GM P/N 1051344 (Canadian P/N  993037) or equivalent to the surface of the support plate and the support plate guides.
2. Install the anchor spring (6).
3. Move the anchor ends of the linings together in order to overlap the shoe webs.
4. Install one lining on the guides of the support plate (2).
5. Lubricate the anchor pins where the anchor pins contact the shoe webs with GM P/N 1051344 (Canadian P/N  993037) or equivalent.
6. Install the second lining.
7. Install the return springs (4).
8. Install the drum (1). Refer to Propeller Shaft Parking Brake Drum Replacement .
9. Adjust the parking brake. Refer to Park Brake Adjustment .

Parking Brake Shoe Replacement 12 x 3

Caution: Refer to Brake Dust Caution in the Preface section.

1. Remove the drum (12). Refer to Propeller Shaft Parking Brake Drum Replacement .
2. Remove the return springs (2).
3. Remove the linings (1).
4. Inspect the linings for contamination.
5. Inspect the linings for excessive wear. The minimum thickness with bonded linings is 1.52 mm (0.60 in).
6. Replace the linings (1) as a set, if necessary.
7. Inspect the springs (2) for distortion.
8. Replace the springs, if necessary.
9. Inspect the cam lever 3 and strut (11) for grooves at the brake shoe contact points.
10. Replace the cam and strut (11) lever if necessary.

1. Install the linings.
2. Place the cam lever (10) and strut (11) in position with the contact points between the shoe webs.
3. Use GM P/N 1051344 (Canadian P/N 993037) or equivalent in order to lubricate the points where the brake shoes contact the support plate.
4. Install the return springs (2).
5. Install the drum (12). Refer to Propeller Shaft Parking Brake Drum Replacement .
6. Adjust the parking brake. Refer to Park Brake Adjustment .