GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 LaCrosse 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Secondary Air Injection Pump Replacement

Removal Procedure

    Object Number: 1749701 Size: SH
  1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  2. Disconnect the engine wiring harness electrical connector from the secondary air injection (AIR) pump electrical connector.

    3. Object Number: 1749703 Size: SH
  3. Squeeze the tangs together on the AIR pump inlet hose clamp at the pump until they lock, and reposition the clamp.
  4. Remove the AIR pump inlet hose from the AIR pump.

    5. Object Number: 1749715 Size: SH
  5. Squeeze the tangs together on the AIR pump outlet hose clamp (3) at the pump until they lock, and reposition the clamp.
  6. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .

    7. Object Number: 1749706 Size: SH
  7. Squeeze the AIR pump electrical connector clip (1) and push up in order to remove the clip from the bracket.
  8. Remove the AIR pump nuts (2).
  9. Lower the vehicle.
  10. Remove the AIR pump.

Installation Procedure

    Object Number: 1749706 Size: SH
  1. Install the AIR pump.
  2. Raise and suitably support the vehicle.

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

  3. Install the AIR pump nuts (2).

    4. Tighten
    Tighten the nuts to 9 N·m (80 lb in).

  4. Install the AIR pump electrical connector clip (1) to the bracket.
  5. Lower the vehicle.

    6. Object Number: 1749715 Size: SH
  6. Install the AIR pump outlet hose to the AIR pump.
  7. Position and release the AIR pump outlet hose clamp (3).

    8. Object Number: 1749703 Size: SH
  8. Install the AIR pump inlet hose to the AIR pump.
  9. Position and release the AIR pump inlet hose clamp.

    10. Object Number: 1749701 Size: SH
  10. Connect the engine wiring harness electrical connector to the AIR pump electrical connector.
  11. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .