Avalanche 4WD V8-5.3L (2011)
7. Remove the HPA (1).
8. Remove and discard the HPA O-ring seal (1).
9. Remove any debris from the O-ring seal groove in the brake modulator assembly with a clean, lint-free shop cloth.
10. If replacing the HPA, properly render inert and dispose of the HPA. Refer to Power Brake Booster Pump Fluid Accumulator Disposal See:
Procedures.
Installation Procedure
