GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1263883  Size: SH
  1. Disconnect the negative battery cable.
  2. Notice: Perform the following steps before beginning any vehicle lifting or jacking procedure:

       • Remove or secure all of the vehicle's contents in order to avoid any shifting or any movement that may occur during the vehicle lifting or jacking procedure.
       • The lifting equipment or the jacking equipment weight rating must meet or exceed the weight of the vehicle and any vehicle contents.
       • The lifting equipment or the jacking equipment must meet the operational standards of the lifting equipment or jacking equipment's manufacturer.
       • Perform the vehicle lifting or jacking procedure on a clean, hard, dry, level surface.
       • Perform the vehicle lifting or jacking procedure only at the identified lift points. DO NOT allow the lifting equipment or jacking equipment to contact any other vehicle components.
    Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle's contents.

  3. Raise and suitably support the vehicle.
  4. Remove the intake manifold support bracket bolts.
  5. Remove the intake manifold support bracket.
  6. Disconnect the knock sensor (KS) electrical connector.
  7. Remove the KS bolt.
  8. Remove the KS.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1263883  Size: SH
  1. Install the KS with the bolt.
  2. Tighten
    Tighten the KS bolt to 20 N·m (15 lb ft).

  3. Connect the KS electrical connector.
  4. Install the intake manifold support bracket with the bolts.
  5. Tighten

        • Tighten the intake manifold support bracket upper bolts to 25 N·m (18 lb ft).
        • Tighten the intake manifold support bracket lower bolts to 45 N·m (33 lb ft).
  6. Lower the vehicle.
  7. Connect the negative battery cable.