GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure

  1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.

  2. Object Number: 527515  Size: SH
  3. Using theJ 38185 loosen the clamp.
  4. Remove the outlet surge tank hose from the heater hose assembly.

  5. Object Number: 614455  Size: SH
  6. Using theJ 38185 loosen the inlet (2) and outlet (1) hose clamps.
  7. Remove the heater pipes.

  8. Object Number: 615208  Size: SH
  9. Using theJ 38185 loosen the heater hose inlet and outlet clamps.
  10. Remove the hoses (1, 2) from the heater core.
  11. Remove the hose assembly.

Installation Procedure


    Object Number: 615208  Size: SH
  1. Position the heater hose assembly into the vehicle.
  2. Install the inlet and outlet hoses (1, 2) to the heater core.
  3. Using theJ 38185 reposition the clamp.

  4. Object Number: 527515  Size: SH
  5. Install the surge tank outlet hose.
  6. Using theJ 38185 reposition the clamp.

  7. Object Number: 614455  Size: SH
  8. Install the inlet (2) and outlet (1) hoses to the heater pipes.
  9. Using theJ 38185 reposition the clamps.
  10. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.