tghe caddy internals are not the same, but they do have a resistor for the fan

To get to it, open the bonnet & remove the plastic scuttle cover, you'll see the fan & blower inlet. Remove the 4 bolts holding the grill on, then unplug the resistor and remove the screws holding the bracket to the car.
At this point, its a good idea to spray the moving parts of the fan with some spray lube, silicone stuff works well.