2008 Cadillac Escalade ESV Brake Booster

You can apply the park brake, deplete the vacuum reserve in the vacuum booster by applying the brake pedal 3 times or until the brake pedal becomes firm, remove the electrical connectors for the DOD sensor and the active booster connector, the vacuum hose from the check valve, the 2 master cylinder nuts, position the master cylinder aside and secure with heavy mechanics wire or equivalent, remove the brake booster pushrod retainer bolt, the brake booster pushrod retainer, the stop lamp switch, the brake booster nuts, the power vacuum brake booster, and discard the brake booster gasket.

You can install the brake booster vacuum sensor grommet to the brake booster, the brake booster vacuum sensor to the brake booster, and connect the chassis wiring harness electrical connector to the brake booster vacuum sensor.

You can install the stop lamp switch, the 4 booster to bulkhead nuts, the booster, the gasket, and the master cylinder, connect the return hose, the steering gear, and the inlet hoses, bleed the hydraulic booster system, release the park brake and unblock the wheels.

The power brake booster may appear wet due to excessive assembly fluid during manufacturing or brake fluid that could have been spilled during system fill. To prevent unnecessary replacement of the power steering boosters, perform the following power brake booster leak inspection before replacing the power brake booster. To properly diagnose a leak condition, aid from an assistant may be required. The power brake booster system must be observed while completing this inspection. Do not hold the wheel for more than three seconds at a full stop, as this will increase the fluid temperature in the pump above the operating temperature. On low mileage vehicles, at the joint between the power brake booster housing and end cap 1, light moisture is acceptable. If fluid droplets develop, the power brake booster must be replaced. A leak between the power steering brake booster 2 and the master cylinder is not acceptable. If a leak is present, the type of fluid must be determined. The power steering fluid indicates that the power brake booster needs to be replaced. Brake fluid indicates an issue with the brake master cylinder.

You can disconnect the chassis wiring harness electrical connector, remove the brake booster vacuum sensor from the brake booster, and the brake booster vacuum sensor grommet from the brake booster.