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Installation Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, 2004 Chevrolet Cab & Chassis Silverado, and 2003 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Verify that the replacement combination valve has the same pin punched identification code as the code on the old combination valve.
  1. Install the combination valve to the vehicle.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the front and the rear brake pipes to the combination valve.

    Tighten:  Tighten the brake pipe nuts to 25 N.m (18 lb ft).

    3. Fig 1: Combination Valve & Brake Pipes
    GM596405Courtesy of GENERAL MOTORS CORP.
  3. Connect the combination valve electrical connector.
    4. IMPORTANT: Verify that the combination valve metering rod is depressed during bleeding.
  4. Bleed the brake system. Refer to Hydraulic Brake System Bleeding (Manual)  or Hydraulic Brake System Bleeding (Pressure) .
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