GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Lucerne 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Throttle Body Assembly Replacement

Removal Procedure

    Object Number: 1686287 Size: SH
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  2. Disconnect the engine harness electrical connector (1) from the throttle actuator.

    3. Object Number: 1686290 Size: SH
  3. Loosen the throttle body bolts.
  4. Remove the throttle body nuts.
  5. Remove the throttle body and seal.

Installation Procedure

    Object Number: 1686290 Size: SH
  1. Install the throttle body and seal.
  2. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the nuts.
  3. Install the throttle body nuts.

    4. Notice: Refer to Fastener Notice in the Preface section.

  4. Tighten the throttle body bolts/nuts.

    5. Tighten
    Tighten the bolts/nuts to 10 N·m (89 lb in).


    Object Number: 1686287 Size: SH
  5. Connect the engine harness electrical connector (1) to the throttle actuator.
  6. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .