On my 2005 Beaver, the module is under the access panel on the dash located directly in front of the driver. It's black, about the size of a deck of cards and has a reset button wired to it along with what looks like an unconnected cable (yellow cable if I remember correctly). To reprogram your remote, you'll need to find the other end of the cable (mine wasn't too far away) and you'll need the reset button as well.
Hope that helps!
Dave