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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 (LLT) >> Removal Procedure

Removal 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: Identifying Check Valve & Vacuum Brake Booster
    GM1919905Courtesy of GENERAL MOTORS CORP.
  1. Apply the brake pedal several times until the pedal becomes firm to deplete the vacuum reserve in the brake booster.
  2. Remove the check valve (1) from the vacuum brake booster.
    3. Fig 2: View Of Vacuum Clamp & Hose
    GM1919913Courtesy of GENERAL MOTORS CORP.
  3. Remove and discard the vacuum hose clamp (1).
  4. Remove the vacuum hose (2) from the vacuum port on the LH side of the intake manifold.
    5. Fig 3: Removing/Installing Vacuum Brake Booster Hose Quick Connect
    GM1919921Courtesy of GENERAL MOTORS CORP.
  5. Release the vacuum brake booster hose quick connect (1) from the power brake booster auxiliary pump.
  6. Remove the check valve from the vacuum brake booster hose, if necessary.
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