GM Service Manual Online
For 1990-2009 cars only

Intake Air Temperature (IAT) Sensor

The IAT sensor is mounted in the rear air intake duct.

Removal Procedure

Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.

  2. Object Number: 74279  Size: SH
  3. Disconnect the IAT sensor electrical connector.
  4. Grasp and remove the IAT sensor (3) with a twisting and pulling motion.

Installation Procedure


    Object Number: 74279  Size: SH
  1. Position and insert the IAT sensor (3) into the rear air intake duct (2).
  2. Connect the IAT sensor electrical connector.
  3. Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  4. Reconnect the negative battery cable.