Power Brake Booster Vacuum Sensor Replacement

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Power Brake Booster Vacuum Sensor

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Preliminary Procedures Turn the ignition switch to the OFF position. Apply the brake pedal several times until the brake pedal becomes firm to deplete the power brake booster vacuum reserve. Disconnect the power brake booster vacuum sensor electrical connector.
1	Power Brake Booster Vacuum Sensor Tip: If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the power brake booster vacuum sensor to the brake booster. Do not use soap.

Callout

Component Name

Preliminary Procedures

Turn the ignition switch to the OFF position.
Apply the brake pedal several times until the brake pedal becomes firm to deplete the power brake booster vacuum reserve.
Disconnect the power brake booster vacuum sensor electrical connector.

Power Brake Booster Vacuum Sensor
Tip: If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the power brake booster vacuum sensor to the brake booster. Do not use soap.