GM Service Manual Online
For 1990-2009 cars only

    Object Number: 260118  Size: SH
  1. Disconnect the knock sensor wire harness retaining clips from the pipe.
  2. Remove the engine coolant air bleed hose and clamp.
  3. Remove the pipe bolts.
  4. Remove the pipe and gaskets.

  5. Object Number: 64262  Size: SH
  6. Remove the gaskets from the pipe.
  7. Discard the gaskets.

  8. Object Number: 492760  Size: SH
  9. Remove the hose (2) from the pipe (1).