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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1122 (Hydraulic Brake System) >> Repair Instructions >> Vacuum Brake Booster Check Valve and/or Hose Replacement (LP1, LY7) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Vacuum Hose & Intake Manifold Vacuum Port
    GM924495Courtesy of GENERAL MOTORS CORP.
  1. Install the vacuum hose (2) to the vacuum port (1) on the LH side of the intake manifold.

    If necessary, a small amount of denatured alcohol may be used as a lubricant for assembly. Do not use soap.

  2. Fig 2: Identifying Check Valve & Vacuum Brake Booster
    GM1919905Courtesy of GENERAL MOTORS CORP.
  3. Install the check valve to the vacuum brake booster hose, if removed.
  4. Install the check valve (1) to the vacuum brake booster.

    If necessary, a small amount of denatured alcohol may be used as a lubricant for assembly. Do not use soap.