GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2007 🢒 Lucerne 🢒 Engine 🢒 Engine Controls and Fuel - 4.6L 🢒 Throttle Body Assembly Replacement

Removal Procedure

    Object Number: 1661022 Size: SH

    Notice: Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.

  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  3. Disconnect the positive crankcase ventilation (PCV) fresh air tube quick connect fittings at the camshaft cover and the air cleaner outlet duct. Refer to Plastic Collar Quick Connect Fitting Service .
  4. Remove the PCV fresh air tube.

    5. Object Number: 1662120 Size: SH
  5. Disconnect the engine harness electrical connector (5) from the throttle actuator.

    6. Object Number: 1670281 Size: SH
  6. Remove the transaxle vent hose clip (1) from the shift cable bracket.

    7. Object Number: 1664517 Size: SH
  7. Remove the transaxle shift cable clip from the shift cable bracket.

    8. Object Number: 1564198 Size: SH
  8. Remove the throttle body bolts.
  9. Remove the shift cable bracket.
  10. Remove the throttle body.
  11. Remove and discard the throttle body seal.

Installation Procedure

    Object Number: 1564198 Size: SH
  1. Install a NEW throttle body seal.
  2. Position the throttle body.
  3. Position the shift cable bracket.

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

  4. Install the throttle body bolts.

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


    Object Number: 1664517 Size: SH
  5. Install the transaxle shift cable clip to the shift cable bracket.

    6. Object Number: 1670281 Size: SH
  6. Install the transaxle vent hose clip (1) to the shift cable bracket.

    7. Object Number: 1662120 Size: SH
  7. Connect the engine harness electrical connector (5) to the throttle actuator.

    8. Object Number: 1661022 Size: SH

    Important: Route the PCV fresh air tube under the vacuum brake booster hose and the evaporative emission (EVAP) purge valve.

  8. Install the PCV fresh air tube.
  9. Connect the PCV fresh air tube quick connect fittings at the camshaft cover and the air cleaner outlet duct. Refer to Plastic Collar Quick Connect Fitting Service .
  10. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  12. Perform the Throttle Learn procedure. Refer to Throttle Learn.