The only time you will likely have an issue with a stuck spare tire holder on your Town & Country is when you are sitting on the side of the road with a flat tire. Likely, you do not have a tool chest filled with hammers, liquid rust remover and screwdrivers, so you are left with the common items found in a car to break the tire holder free.
Place the pointy end of your tire iron against the edge of the holder
Tilt and hold the tire iron at a 40-degree angle to the tire while keeping the pointy end of the tire iron pressed against the holder.
Strike the socket end of the tire iron with the ball of your fist or a palm-sized rock if you can locate on one the side of the road. Continue to do so until the T-shaped tire holder starts to spin.