Avalanche 2500 4WD V8-8.1L VIN G (2003)
2. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding.
3. Install the master cylinder to the vehicle.
Note: Refer to Fastener Notice in Cautions and Notices.
4. Install the master cylinder mounting nuts. Tighten: Tighten the nuts to 36 N.m (27 lb ft).
5. Remove the rubber cap or plug from the exposed brake pipe fitting ends.
6. Connect the brake pipes. Tighten: Tighten the fittings to 25 N.m (18 lb ft).
7. Connect the electrical connector to the brake fluid level sensor.
8. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding (Manual)Hydraulic Brake System Bleeding (Pressure).
9. Release the park brake and unblock the wheels.
Hydraulic Boost
Master Cylinder Replacement (Hydraulic Boost)
Caution: Refer to Brake Fluid Irritant Caution in Cautions and Notices.
Note: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.
Removal Procedure
1. Apply the park brake and block the wheels.
2. Disconnect the electrical connector from the brake fluid level sensor.
Important: Install a rubber cap or plug to the exposed brake pipe fitting ends in order to prevent brake fluid loss and contamination.
3. Disconnect the brake pipes from the master cylinder.
4. Plug the open brake pipe ends.
