GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

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.

  1. Disconnect the negative battery cable.

  2. Object Number: 712012  Size: SH
  3. Disconnect the mass air flow (MAF) sensor (5) harness connector.

  4. Object Number: 239513  Size: SH
  5. Loosen the clamps on the MAF sensor.
  6. Carefully remove the MAF sensor from the air intake ducts.

Installation Procedure


    Object Number: 239513  Size: SH

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

  1. Install the MAF sensor 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.

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


    Object Number: 712012  Size: SH
  5. Connect the MAF sensor (5) harness connector.
  6. Connect the negative battery cable.