GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 21867-94 Line Pressure Adapter Kit
    • J 21867-100 Pressure Gauge Adapter
  1. Remove the air cleaner assembly.
  2. Raise the vehicle and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  3. Object Number: 29353  Size: SH
  4. Remove the Line Pressure Plug.

  5. Object Number: 29354  Size: SH
  6. Install J 21867-100 using a ratchet box wrench. Tighten the adapter so that the insert hole for the dowel rod is in a 1 o'clock position.
  7. Lower the vehicle.

  8. Object Number: 29355  Size: SH
  9. Install the dowel rod from J 21867-94 .

  10. Object Number: 29356  Size: SH
  11. Attach a line pressure gauge and hose to the dowel rod fitting.
  12. Secure the hose in a safe position to avoid damage to the tools and vehicle during the line pressure testing.
  13. When you have completed the testing procedure, remove the line pressure gauge and hose from the dowel rod fitting.
  14. Remove the dowel rod.
  15. Raise the vehicle and suitably support the vehicle.
  16. Remove J 21867-100 using a ratchet box wrench.
  17. Install the line pressure plug.
  18. Lower the vehicle.
  19. Install the air cleaner assembly.