GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Impala 🢒 Engine 🢒 Engine Controls - 3.8L (L36 and L67) 🢒 Mass Airflow Sensor Replacement

Removal Procedure
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.

    2. Object Number: 378168 Size: SH

    Important: The mass air flow (MAF) sensor is attached to the throttle body assembly.

  2. Disconnect the MAF sensor electrical connector (8).
  3. Remove the MAF sensor screws (9).
  4. Remove the MAF sensor (1).

Installation Procedure

    Object Number: 378168 Size: SH
  1. Install the MAF sensor (1).

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the MAF sensor screws (9).

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

  3. Connect the MAF sensor electrical connector (8).
  4. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.