GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 LaCrosse 🢒 Engine 🢒 Engine Electrical 🢒 Air Cleaner Assembly Replacement

Removal Procedure

    Object Number: 1554558 Size: SH
  1. Remove the left inner fender brace. Refer to Front Fender Upper Diagonal Brace Replacement .
  2. Loosen the air inlet duct clamp at the throttle body.
  3. Remove the air inlet duct from the throttle body.

    4. Object Number: 1551864 Size: SH
  4. Disconnect the positive crankcase ventilation (PCV) tube from the air inlet duct. Refer to Plastic Collar Quick Connect Fitting Service .

    5. Object Number: 1554546 Size: SH
  5. Disconnect the mass air flow (MAF) sensor electrical connector.
  6. Remove the upper air cleaner housing from the lower housing. Disengage the tabs on the upper housing from the slots on the lower housing.
  7. Without disconnecting the engine control module (ECM) connectors, remove the ECM and the harness from the lower air cleaner housing.
  8. Without disconnecting the transmission control module (TCM) connectors, remove the TCM and the harness from the lower air cleaner housing.
  9. Loosen the air inlet duct clamp at the air cleaner assembly.
  10. Remove the air inlet duct from the air cleaner.

    11. Object Number: 1554550 Size: SH
  11. Remove the lower air cleaner housing by pulling the housing from the 2 rubber grommets on the inner rail.
  12. Inspect the air cleaner housing assembly for signs of damage and replace if necessary.

Installation Procedure

    Object Number: 1554550 Size: SH
  1. Install the lower air cleaner housing by pushing the housing down into the 2 rubber grommets on the inner rail.
  2. Install the TCM and the harness to the lower air cleaner housing.
  3. Install the ECM and the harness to the lower air cleaner housing.

    4. Object Number: 1554546 Size: SH
  4. Install the air inlet duct to the air cleaner assembly.

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

  5. Tighten the air inlet duct clamp at the air cleaner assembly.

    6. Tighten
    Tighten the clamp to 3 N·m (27 lb in).

  6. Install the upper air cleaner housing to the lower housing. Engage the tabs on the upper housing to the slots on the lower housing.
  7. Connect the MAF sensor electrical connector.

    8. Object Number: 1551864 Size: SH
  8. Connect the PCV tube to the air inlet duct. Refer to Plastic Collar Quick Connect Fitting Service .

    9. Object Number: 1554558 Size: SH
  9. Install the air inlet duct to the throttle body.
  10. Tighten the air inlet duct clamp at the throttle body.

    11. Tighten
    Tighten the clamp to 3 N·m (27 lb in).

  11. Install the left inner fender brace. Refer to Front Fender Upper Diagonal Brace Replacement .