Power Vacuum Brake Booster Replacement (Adjustable Pedals)

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: Power Vacuum Brake Booster Replacement (Adjustable Pedals)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Preliminary Procedures Apply the park brake. Deplete the vacuum reserve in the vacuum booster by applying the brake pedal 3 times or until the pedal becomes firm.
1	Brake Booster Pushrod Retainer Bolt CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2	Brake Booster Pushrod Retainer
3	Stop Lamp Switch
4	Brake Booster Pushrod
5	Brake Booster Nut (Qty: 4) Tip: Tighten the upper right vacuum brake booster nut first. Tighten: 33 N.m (24 lb ft)
6	Master Cylinder Nut (Qty: 2) Tighten: 33 N.m (24 lb ft)
7	Master Cylinder Assembly Procedure Without disconnecting the brake pipe fittings, carefully position the master cylinder assembly aside and support with heavy mechanics wire or equivalent. Inspect the brake master cylinder to vacuum brake booster seal for damage and replace if necessary. Ensure the brake master cylinder to vacuum brake booster seal is properly seated in the groove of the master cylinder.
8	Vacuum Brake Booster Hose Clamp
9	Vacuum Brake Booster Hose
10	Vacuum Brake Booster Procedure Disconnect the vacuum brake booster electrical connectors, if equipped. Discard the vacuum brake booster gasket. Install a new vacuum brake booster gasket.