GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Blazer - 4WD - RHD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Mass Airflow Sensor Replacement

Removal Procedure
  1. Turn OFF the ignition.

    2. Object Number: 281851 Size: SH
  2. Disconnect the MAF sensor harness connector.

    3. Object Number: 288460 Size: SH

    Notice: 

       • Handle the MAF sensor carefully.
       • Do not drop the MAF sensor in order to prevent damage to the MAF sensor.
       • Do not damage the screen located on the air inlet end of the MAF.
       • Do not touch the sensing elements.
       • Do not allow solvents and lubricants to come in contact with the sensing elements.
       • Use a small amount of a soap based solution in order to aid in the installation.

  3. Disconnect the MAF sensor from the air cleaner cover and air cleaner outlet duct by loosening the hose clamps.

Installation Procedure

    Object Number: 288460 Size: SH

    Important: The embossed arrow on the MAF sensor indicates the proper air flow direction. The arrow must point towards the engine.

  1. Attach the MAF sensor to the air cleaner outlet duct and the air cleaner cover.

    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. Secure the air cleaner cover and outlet duct to the MAF sensor.

    3. Tighten
    Tighten the clamps to 4 N·m (35 lb in)


    Object Number: 281851 Size: SH
  3. Connect the MAF sensor harness connector.