Installation Procedure

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 High Pressure Accumulator (HPA) O-Ring

Courtesy of GENERAL MOTORS CORP.

Lubricate a new O-ring seal (1) with Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
Install the O-ring seal to the HPA. Ensure the seal is fully seated in the groove of the HPA and is not twisted.

Fig 2: View Of High Pressure Accumulator (HPA)

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Fastener Caution .

Install the HPA (1) to the brake modulator assembly and tighten to 30 N.m (22 lb ft).
Install the brake modulator assembly bracket and remove the support. Refer to Brake Pressure Modulator Valve Replacement .

Fig 3: View Of Brake Modulator Manual Pressure Relief Valve

Courtesy of GENERAL MOTORS CORP.

Tighten the brake modulator manual pressure relief valve (1) to 40 N.m (30 lb ft).
Perform the Antilock Brake System Automated Bleed Procedure . Follow the procedure completely to ensure the learn procedure for the pressure and travel sensors has occurred.