GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Express 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Mass Airflow Sensor Replacement

Removal Procedure
  1. Turn OFF the ignition.

    2. Object Number: 712012 Size: SH
  2. Disconnect the mass air flow (MAF) sensor harness connector.
  3. Loosen the clamps (1) on the MAF sensor.
  4. Carefully remove the MAF sensor from the air intake ducts (5).

Installation Procedure

    Important: Ensure that the MAF sensor flow arrows point away from the air cleaner assembly.

  1. Install the MAF sensor (5) into the air intake ducts.

    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. Tighten the clamps (1) on the MAF sensor.

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


    Object Number: 712012 Size: SH
  3. Connect the MAF sensor harness connector.