GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 Envoy XUV 🢒 Engine 🢒 Engine Mechanical - 5.3L 🢒 Mass Airflow Sensor with Intake Air Temperature Sensor Replacement

Removal Procedure

Important: Use care when handling the mass air flow (MAF)/intake air temperature (IAT) sensor. Do not dent, puncture, or otherwise damage the honeycell located at the air inlet end of the MAF/IAT. Do not touch the sensing elements or allow anything including cleaning solvents and lubricants to come in contact with them. Use a small amount of a non-silicone based lubricant, on the air duct only, to aid in installation.


    Object Number: 898340 Size: SH
  1. Disconnect the MAF/IAT sensor electrical connector.

    2. Object Number: 898123 Size: SH
  2. Loosen the clamps at the MAF/IAT sensor and the throttle body.
  3. Remove the air cleaner outlet duct bolt.
  4. Remove the air cleaner outlet duct.
  5. Loosen the clamp attaching the MAF/IAT sensor to the air cleaner housing.
  6. Remove the MAF/IAT sensor from the air cleaner housing.

Installation Procedure

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


    Object Number: 359112 Size: SH
  1. Locate the air flow direction arrow (2) on the MAF/IAT sensor.

    2. Object Number: 898123 Size: SH
  2. Install the MAF/IAT sensor on to the air cleaner housing.

    3. 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 clamp securing the MAF/IAT sensor to the air cleaner housing.

    4. Tighten
    Tighten the clamp to 7 N·m (62 lb in).

  4. Install the air cleaner outlet duct.
  5. Install the air cleaner outlet duct bolt.

    6. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  6. Tighten the clamps at the MAF/IAT sensor and the throttle body.

    7. Tighten
    Tighten the clamps to 7 N·m (62 lb in).


    Object Number: 898340 Size: SH
  7. Connect the MAF/IAT electrical connector.