GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Rainier 🢒 Engine 🢒 Engine Controls - 4.2L 🢒 Throttle Body Assembly Replacement

Removal Procedure

    Object Number: 742490 Size: SH
  1. Remove the resonator assembly. Refer to Air Cleaner Outlet Resonator Replacement .
  2. Remove the evaporative emission (EVAP) canister purge line from the throttle body.
  3. Disconnect the throttle body electrical connector.
  4. Remove the throttle body assembly retaining bolts (1).
  5. Remove the throttle body assembly (2) and the gasket from the intake manifold.
  6. Clean the gasket surface.

Installation Procedure

    Object Number: 742490 Size: SH
  1. Install the throttle body assembly (2) to the intake manifold with the gasket.
  2. Add sealer GM P/N 12346004 (Canadian P/N 10953480) to the throttle control module bolt threads.

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

  3. Install the throttle body assembly retaining bolts (1).

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

  4. Connect the throttle body electrical connector.
  5. Install the EVAP canister purge line to the throttle body.
  6. Install the resonator assembly. Refer to Air Cleaner Outlet Resonator Replacement .