Reassembly (Front Caliper)
- Lubricate the new piston seal with Delco Supreme 11® (GM P/N 12377967) or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
- Install the lubricated, new piston seal into the caliper bore.
- Install the caliper piston into the caliper bore. Press the piston to the bottom of the bore.
- Install the new piston dust boot seal over the piston.
- Use Special Tool (J-36349) to fully seat the caliper piston seal into the counterbore. See Fig 1.
Courtesy of GENERAL MOTORS CORP.
- Install the bleeder valve and cap to the caliper and tighten the valve securely.
- Install the front brake caliper to the vehicle. See BRAKE CALIPERS under REMOVAL & INSTALLATION.