Avalanche 4WD V8-5.3L (2011)
Brake Fluid Reservoir: Service and Repair
Master Cylinder Reservoir Replacement
Removal Procedure
Warning: Refer to Brake Fluid Irritant Warning See: Service Precautions/Technician Safety Information/Brake Fluid Irritant Warning.
Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution See: Service Precautions/Vehicle Damage Warnings/Brake Fluid
Effects on Paint and Electrical Components Caution.
Note: The ignition must be in the OFF position, without pausing at ACCESSORY, and without applying the brake pedal to ensure the brake
modulator and high pressure accumulator (HPA) pressure relief occurs. This process will take approximately 1 to 3 minutes.
1. Turn the ignition to OFF, without pausing at ACCESSORY, and remove the ignition key.
Note: During the pressure relief process, the fluid level in the master cylinder reservoir will rise. Do not remove the master cylinder reservoir cap
during the pressure relief process.
2. Wait approximately 1 to 3 minutes until the brake modulator and HPA pressure relief is complete.
3. Remove the brake fluid from the brake master cylinder reservoir and discard into an approved container.
4. Disconnect the brake fluid level sensor electrical connector.
5. Disconnect the brake master cylinder reservoir return hose quick connect (1) and position the hose aside.
6. Disconnect the brake master cylinder reservoir supply hose quick connect (2) and position the hose aside.
