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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 118 (Hydraulic Brake System) >> Repair Instructions >> Vacuum Brake Booster Replacement >> Installation Procedure

Installation Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Vacuum Booster & Nuts
    GM344197Courtesy of GENERAL MOTORS CORP.
  1. Install the NEW brake booster gasket.
    2. IMPORTANT: An assistant may be necessary to hold the brake booster in place while installing the nuts.
  2. Install the brake booster to the vehicle.
    3. NOTE: Refer to Fastener Notice .
    IMPORTANT: Tighten the upper right brake booster nut first.
  3. Install the brake booster nuts.

    Tighten:  Tighten the nuts to 33 N.m (24 lb ft).

    4. Fig 2: View Of Pedal Stud, Stop Lamp Switch, Pushrod & Retaining Clip
    GM344194Courtesy of GENERAL MOTORS CORP.
  4. Install the pushrod (3) and stop lamp switch (2) to the brake pedal (1).
  5. Install the pushrod retaining clip (4) to the brake pedal (1).
    6. Fig 3: View Of DOD Sensor, Booster Connector & Check Valve
    GM1704907Courtesy of GENERAL MOTORS CORP.
  6. Install the vacuum hose to the check valve (3).
  7. Install the electrical connectors to the DOD sensor (1) and the active booster connector (2).
  8. Install the master cylinder.
  9. Install the 2 master cylinder nuts.

    Tighten:  Tighten the nuts to 33 N.m (24 lb ft).

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