GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the air cleaner. Refer to Air Cleaner Element Replacement .
  2. Loosen the air duct clamp at the rear of the mass air flow sensor.

  3. Object Number: 1252539  Size: SH
  4. Remove the air duct  (1).

Installation Procedure


    Object Number: 1252539  Size: SH
  1. Install the air duct  (1).
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the air duct to the throttle body.
  4. Tighten
    Tighten the clamp assembly to 3 N·m (27 lb in).

  5. Install the air cleaner.