Generally, Dodge Durangos of that year have fuse boxes located:
* Under the hood: This is the most common location for high-amperage fuses related to power-consuming components.
* Inside the vehicle, usually under the dashboard: This box typically houses lower-amperage fuses for interior components.
Without your owner's manual, it's impossible to give you the exact location. Searching online for "2006 Dodge Durango owner's manual PDF" should provide a free downloadable version. This is the best resource to accurately locate the correct fuse.