GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 674702  Size: SH
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  2. Disconnect the mass air flow (MAF)/intake air temperature (IAT) sensor electrical connector (4) .

  3. Object Number: 334911  Size: SH
  4. Pull up on the air cleaner assembly (1) in order to release the retainers from the air cleaner adaptor (2).

  5. Object Number: 858230  Size: SH
  6. If necessary, loosen the MAF/IAT clamp.
  7. If necessary, remove the MAF/IAT sensor.

Installation Procedure


    Object Number: 858230  Size: SH

    Important: If the MAF/IAT sensor is installed backwards, the fuel system goes rich. An arrow cast into the plastic portion of the sensor indicates proper air flow direction. The arrow must point toward the engine.

  1. If necessary, install the MAF/IAT sensor.
  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. If necessary, tighten the MAF/IAT clamp.
  4. Tighten
    Tighten the clamp to 7 N·m (62 lb in).


    Object Number: 334911  Size: SH
  5. Position the air cleaner assembly (1) onto the air cleaner adaptor (2).
  6. Push down on the air cleaner assembly in order to secure the assembly to the adaptor.

  7. Object Number: 674702  Size: SH
  8. Connect the MAF/IAT sensor electrical connector (4).
  9. Install the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .