Can a camera be added to the navigation screen of a 2006 toyota tundra?
I googled your question and this is one of the web sites that came up
http://www.tundrasolutions.com/forums/tundra/130162-oem-navigation-w-back-up-camera-2/
I recommend also checking crutchfield.com
If it can be done, an RV dealership service department would be a good place to have the work done.