GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Controls and Fuel - 6.6L 🢒 Intake Air Temperature (IAT) Sensor 2 Replacement

Removal Procedure

    Object Number: 1864639 Size: SH
  1. Remove the air intake pipe. Refer to Air Intake Pipe Replacement .
  2. Disconnect the intake air temperature (IAT) sensor clip from the water outlet pipe bracket.
  3. Disconnect the IAT sensor electrical connector (1) from the engine wiring harness electrical connector.
  4. Remove the IAT sensor (2) from the center intake manifold.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1864639 Size: SH
  1. Install the IAT sensor (2) to the center intake manifold.

    2. Tighten
    Tighten the sensor to 25 N·m (18 lb ft).

  2. Connect the IAT sensor electrical connector (1) to the engine wiring harness electrical connector.
  3. Connect the IAT sensor clip to the water outlet pipe bracket.
  4. Install the air intake pipe. Refer to Air Intake Pipe Replacement .