yes it can. instructions below.
Drain cooling system.
Disconnect heater hoses from heater core tubes in engine compartment and plug hoses.
Remove glove compartment for easier access.
Move the Rear Antilock Module out of the way.
Disconnect vacuum source, then leave the vacuum harness attached to the heater core cover.
Remove the heater control cable from the cover using tool D91T-18532-A.
Fig. 8 Heater Core Replacement
Remove the screws attaching heater core access cover to plenum chamber assembly in passenger compartment, then remove access cover.
Remove heater core and seal out of plenum chamber assembly.
Reverse procedure to install.