GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 69062  Size: SH
  1. Drain coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  2. Disconnect the intake air temperature (IAT) sensor electrical connector.
  3. Disconnect the breather tube from the air intake tube.
  4. Remove the air intake tube.

  5. Object Number: 69056  Size: SH
  6. Disconnect the idle air control (IAC) valve electrical connector.

  7. Object Number: 69065  Size: SH
  8. Disconnect the throttle position (TP) sensor electrical connector.

  9. Object Number: 12735  Size: SH
  10. Disconnect the accelerator controls cable from the throttle lever and accelerator bracket. Refer to Accelerator Control Cable Replacement .

  11. Object Number: 319387  Size: SH
  12. If applicable disconnect the cruise control cable from the throttle lever and accelerator bracket.

  13. Object Number: 12689  Size: SH
  14. Remove the accelerator control cable bracket. Refer to Accelerator Control Cable Bracket Replacement .

  15. Object Number: 12688  Size: SH
  16. Disconnect the throttle body coolant bypass hoses.
  17. Disconnect the heater pipe nut at the throttle body.
  18. Remove the nuts and bolts holding the throttle body to the intake manifold.
  19. Remove the throttle body assembly.

Installation Procedure

Notice: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result.

Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.


    Object Number: 12688  Size: SH
  1. Clean the gasket surface on the intake manifold and the throttle body assembly.
  2. If necessary, install a new gasket.
  3. Install the throttle body assembly.
  4. 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.

  5. Install the throttle body retaining nuts and bolts.
  6. Tighten
    Tighten the throttle body retaining nuts and bolts to 28 N·m (21 lb ft).

  7. Connect the throttle body coolant bypass hoses.
  8. Connect the heater pipe nut at the throttle body.

  9. Object Number: 69056  Size: SH
  10. Connect the IAC valve electrical connector.

  11. Object Number: 69065  Size: SH
  12. Connect the TP sensor electrical connector.

  13. Object Number: 12689  Size: SH
  14. Install the accelerator controls cable bracket. Refer to Accelerator Control Cable Bracket Replacement .
  15. If applicable connect the cruise control cable to the throttle lever and accelerator bracket.

  16. Object Number: 12735  Size: SH
  17. Connect the accelerator controls cable to the throttle lever and accelerator bracket. Refer to Accelerator Control Cable Replacement .

  18. Object Number: 69062  Size: SH
  19. Install the air intake tube.
  20. Tighten
    Tighten the air cleaner duct clamp to 2 N·m (18 lb in).

  21. Connect the IAT sensor electrical connector.
  22. Connect the breather tube into the air intake tube.
  23. Refill the coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  24. Important: The throttle should operate freely without binding between full closed and wide open throttle.

  25. Inspect for complete throttle opening and closing positions by operating the accelerator pedal. Also inspect for poor carpet fit under the accelerator pedal.