GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Cadillac
🢒
2003
🢒
DeVille
🢒
HVAC
🢒
Heating, Ventilation and Air Conditioning
🢒 Heater Hoses Replacement
Tools Required
J 37097-A
Heater Hose Clamp Tool
Removal Procedure
Drain the cooling system. Refer to
Cooling System Draining and Filling
.
Using the
J 37097-A
, remove the clamps from the coolant reservoir hose and the heater core side of the hoses.
Using the
J 37097-A
, remove the heater hose clamps from the engine.
Remove the heater hoses from the heater core.
Remove the heater hoses (1, 2) from the engine.
Remove the heater hoses.
Installation Procedure
Install the heater hoses (1, 2) to the engine.
Install the heater hoses (1, 2) to the heater core.
Install the coolant reservoir hose.
Using the
J 37097-A
, install the heater hose clamps to the engine.
Using the
J 37097-A
, install the clamps to the coolant reservoir hose and the heater core side of the hoses.
Refill the cooling system. Refer to
Cooling System Draining and Filling
in Engine Cooling.