GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.

Important: An 8 digit part identification number is stamped on the throttle body casting. Refer to this number if servicing, or part replacement is required.


    Object Number: 750525  Size: SH
  1. Remove the intake air resonator. Refer to Intake Air Resonator Replacement .
  2. Disconnect the throttle actuator motor electrical connector (5).

  3. Object Number: 858205  Size: SH

    Important: Cover or plug any openings when servicing the throttle body in order to prevent possible contamination.

  4. Remove the throttle body nuts.
  5. Remove the throttle body.
  6. Remove and discard the throttle body gasket.

Installation Procedure


    Object Number: 858205  Size: SH
  1. Install a NEW throttle body gasket.
  2. Install the throttle body.
  3. 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.

  4. Install the throttle body nuts.
  5. Tighten
    Tighten the nuts to 10 N·m (89 lb in).


    Object Number: 750525  Size: SH
  6. Connect the throttle actuator motor electrical connector (5).
  7. Install the intake air resonator. Refer to Intake Air Resonator Replacement .
  8. Connect a scan tool in order to test for proper throttle-opening and throttle-closing range.
  9. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle (WOT).
  10. Verify that the vehicle meets the following conditions:
  11. • The vehicle is not in a reduced engine power mode.
    • The ignition is ON.
    • The ignition is OFF.