This is a seemless installation into you Duramax! The Edge CS and Edge CTS units ship with a GPS style suction cup mount. This package actually comes with a dash piece that installs in less than 30 seconds and looks like the truck came stock with it. I get comments like, "I didn't know these trucks came with that" all the time when people first see my Edge CTS with the dash pod mount.
Basic Interior Dash has the 4x4 on the RIGHT of the steering wheel.