GM Service Manual Online
For 1990-2009 cars only

    Object Number: 58144  Size: SH
  1. Remove the coolant outlet assembly bolts.
  2. Remove the coolant outlet assembly.

  3. Object Number: 58147  Size: SH
  4. Remove the thermostat.
  5. Remove the heater inlet pipe nipple.

  6. Object Number: 54962  Size: SH
  7. Remove the engine coolant temperature sensor.

  8. Object Number: 69939  Size: SH
  9. Remove the intake manifold coolant pipe retaining screw.
  10. Carefully pry out the intake manifold coolant pipe from the lower intake manifold.
  11. Discard the intake manifold coolant pipe.