GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1401993  Size: SH
  1. Remove the engine coolant air bleed pipe bolts (309).
  2. Remove the pipe (307) with seals (308).

  3. Object Number: 1552485  Size: SH
  4. Remove the seals (308) from the pipe and covers.
  5. Discard the seals.