GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 34730-1A Fuel Pressure Gauge

Removal Procedure


    Object Number: 166861  Size: SH
  1. Relieve fuel system pressure. Refer to Fuel Pressure Relief .
  2. Remove the air intake duct (1) clamp (2) from the air cleaner assembly (3).

  3. Remove the intake air duct (1) clamp (5) from the MAF sensor (4).

  4. Object Number: 154854  Size: SH
  5. Disconnect the transaxle vent hose (2) from the clip attached to the accelerator controls cable bracket (1).

  6. Object Number: 19023  Size: SH
  7. Remove the throttle body mount bolts from the throttle body (1).
  8. Remove the throttle body. Refer to Throttle Body Assembly Replacement .
  9. Remove the throttle body spacer bolts from the spacer.

  10. Object Number: 53639  Size: SH
  11. Remove the EGR pipe at throttle body spacer.

  12. Object Number: 19023  Size: SH
  13. Remove the crankcase ventilation pipe at the throttle body spacer.
  14. Remove the throttle body spacer (3) and gasket (2) from the intake manifold (4).
  15. Important: Use care when cleaning the old gasket from the aluminum surfaces.

  16. Clean the throttle body gasket surfaces.
  17. Clean the throttle body spacer gasket surfaces.

Installation Procedure


    Object Number: 19023  Size: SH
  1. Install the throttle body spacer gasket and throttle body spacer (3) to the intake manifold (4).
  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. Install the throttle body spacer bolts.
  4. Tighten
    Tighten the throttle body spacer attaching bolts to 12 N·m (106 lb in).


    Object Number: 53639  Size: SH
  5. Install the EGR pipe to the throttle body spacer.
  6. Tighten
    Tighten the EGR pipe bolt to 28 N·m (21 lb ft).

  7. Install the crankcase ventilation pipe at the throttle body spacer.

  8. Object Number: 19023  Size: SH
  9. Install the new gasket (2) and throttle body (1). Refer to Throttle Body Assembly Replacement .
  10. Tighten
    Tighten the throttle body attaching bolts to 12 N·m  (106 lb in).


    Object Number: 154854  Size: SH
  11. Install the transaxle vent hose (2) to the clip attached to the accelerator controls cable bracket (1).

  12. Object Number: 166861  Size: SH
  13. Install the intake air duct (1) clamp (5) to the MAF sensor (4).
  14. Install the air intake duct (1) clamp (2) to the air cleaner assembly (3).
  15. Tighten
    Tighten the clamps (2), (5), to 3 N·m (27 lb in).

  16. Install the negative battery cable.