GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra - 4WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Mass Airflow Sensor with Intake Air Temperature Sensor Replacement

Removal Procedure

    Object Number: 1703498 Size: SH

    Note: 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.

  1. Remove the air cleaner outlet resonator. Refer to Air Cleaner Resonator Outlet Duct Replacement.
  2. Disconnect the engine wiring harness electrical connector (2) from the MAF/IAT sensor.

    3. Object Number: 1703691 Size: SH
  3. Loosen the MAF/IAT sensor adapter clamp.
  4. Remove the MAF/IAT sensor from the air cleaner assembly.

Installation Procedure

    Object Number: 1703691 Size: SH

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

  1. Install the MAF/IAT sensor to the air cleaner assembly.

    2. Caution: Refer to Fastener Caution in the Preface section.

  2. Tighten the MAF/IAT sensor adapter clamp.

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


    Object Number: 1703498 Size: SH
  3. Connect the engine wiring harness electrical connector (2) to the MAF/IAT sensor.
  4. Install the air cleaner outlet resonator. Refer to Air Cleaner Resonator Outlet Duct Replacement.