GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 154890  Size: SH
  1. Remove the coolant surge inlet hose (1) from the throttle body to surge tank (2) (coolant recovery tank).

  2. Object Number: 104607  Size: SH
  3. Remove the air cleaner cover (3).

  4. Object Number: 104644  Size: SH
  5. Remove the IAT sensor connector from the IAT sensor (1).

  6. Object Number: 104600  Size: SH
  7. Loosen the intake air duct (1) clamp at the Mass Air Flow (MAF) sensor end of the duct.
  8. Disconnect the intake air duct (1) from the MAF sensor.
  9. Remove the air cleaner cover.
  10. Inspect the air cleaner element.
  11. Remove any loose debris that may be found laying in the base of the air cleaner.
  12. Remove the trim panel in front of the air cleaner cover to gain access to the bolts.
  13. Remove the bolts from the assembly.
  14. Remove the PCM from the PCM Air Box (4).

Installation Procedure

Important: An improperly installed air cleaner or a distorted or missing intake air duct may cause at DTC to set. Ensure that the air cleaner assembly and intake air duct is installed correctly and that there are no kinks or folds in the intake air duct. Debris in the air cleaner assembly or MAF sensor inlet screen that may distort air flow can set a DTC.


    Object Number: 142193  Size: SH
  1. Install the PCM (1) into the air inlet housing (2).
  2. Install the bolts from the assembly.
  3. Install the trim panel in front of the air cleaner cover.

  4. Object Number: 104607  Size: SH
  5. Install a new air filter element.
  6. Important: The outlet of the air cleaner assembly and the MAF sensor inlet duct must be lined up when completely installed. Misalignment may cause incorrect air flow readings resulting in MIL illumination or a driveabilty concern.

  7. Pivot the air cleaner cover and duct assembly until the latches and cover engage in the air cleaner element base.
  8. Inspect to be sure that both latches latch.
  9. Refer to

    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.

    in Cautions and Notices.

  10. Install the intake air duct over the MAF sensor (2), being careful to ensure that the intake air duct is secure around the entire outer edge of the MAF sensor.
  11. Tighten
    Tighten the clamp assembly to 3 N·m (27 lb in).


    Object Number: 104644  Size: SH
  12. Connect the IAT sensor connector (1) to the IAT sensor.

  13. Object Number: 154890  Size: SH
  14. Install the coolant surge inlet hose (1) from the throttle body to surge tank (2) (coolant recovery tank).

  15. Object Number: 104607  Size: SH
  16. Install the air cleaner cover (3).
  17. Tighten
    Tighten the cover bolt to 9 N·m (80 lb in).