GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Cadillac
🢒
2009
🢒
STS
🢒
HVAC
🢒
Heating, Ventilation, and Air Conditioning
🢒 Heater Pipes Replacement
Special Tools
J 38185
Hose Clamp Pliers
Removal Procedure
Drain the cooling system. Refer to
Cooling System Draining and Filling
.
Lower the vehicle.
Remove the injector sight shield. Refer to
Fuel Injector Sight Shield Replacement
.
Using
J 38185
, disengage the hose clamp and disconnect the heater outlet hose (1) from the heater pipe assembly.
Using
J 38185
, disengage the hose clamp and disconnect the heater inlet hose (2) from the heater pipe assembly.
Using
J 38185
, disengage the hose clamp and disconnect the surge tank outlet hose from the heater pipe assembly.
Using
J 38185
, disengage the hose clamps and disconnect the heater pipe assembly from the heater core.
Remove the battery tray. Refer to
Battery Tray Replacement
.
Remove the heater pipe assembly retaining nuts.
Reposition the engine wiring harness aside.
Remove the heater pipe assembly.
Installation Procedure
Install the heater pipe assembly.
Reposition the engine wiring harness into place.
Caution:
Refer to
Fastener Caution
in the Preface section.
Install the heater pipe assembly retaining nuts and tighten to
9 N·m (80 lb in)
.
Install the battery tray. Refer to
Battery Tray Replacement
.
Using
J 38185
, disengage the hose clamps and connect the heater pipe assembly to the heater core.
Using
J 38185
, disengage the hose clamp and connect the surge tank outlet hose to the heater pipe assembly.
Using
J 38185
, disengage the hose clamp and connect the heater inlet hose (2) to the heater pipe assembly.
Using
J 38185
, disengage the hose clamp and connect the heater outlet hose (1) to the heater pipe assembly.
Install the injector sight shield. Refer to
Fuel Injector Sight Shield Replacement
.
Fill the cooling system. Refer to
Cooling System Draining and Filling
.