GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42872 Pressure Relief Valve Remover/Installer


    Object Number: 576646  Size: SH
  1. Install the pressure relief valve with a NEW O-ring into the intake manifold using the J 42872 .

  2. Object Number: 576644  Size: SH
  3. Install the throttle body adapter heater plate with a NEW seal to the intake manifold.
  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 adapter heater plate bolt and studs.
  6. Tighten
    Tighten the throttle body adapter heater plate bolt and studs to 8 N·m (71 lb in).


    Object Number: 235321  Size: SH
  7. Install the purge solenoid.
  8. Install the purge solenoid bolt.
  9. Tighten
    Tighten the purge solenoid bolt to 8 N·m (71 ft in).


    Object Number: 235324  Size: SH
  10. Press the MAP sensor in place at the top of the throttle body mounting location.

  11. Object Number: 520852  Size: SH
  12. Install the throttle body heater hoses to the throttle body adapter heater plate.

  13. Object Number: 233209  Size: SH
  14. Install the brake booster vacuum hose (1).

  15. Object Number: 607373  Size: SH
  16. Install a NEW throttle body gasket on the throttle body.
  17. Place the throttle body and a NEW gasket in position on the intake manifold.
  18. Install the throttle body nuts.
  19. Tighten
    Tighten the throttle body nuts to 12 N·m (106 lb in).

  20. Install the accelerator cable bracket and bolt.
  21. Tighten
    Tighten the accelerator cable bracket bolt to 9 N·m (80 lb in).

    Important: Do not reuse the intake manifold-to-cylinder head sealing gaskets.

  22. Install NEW intake manifold-to-cylinder head gaskets.