The BullyDog GT Under Mirror Mounting Kit for Chevy Silverado, GMC Sierra will allow you to mount your BullyDog GT or Bullydog Watchdog directly under your rear view mirror. Backed by a lifetime warranty and fits 1999-2013 Chevy, GMC, and Cadillac Models. You'll also need an HDMI Extension Cable and Power Extension cable which you can purchase in the Data Power Extension Kit above (additional $19.99) or you can purchase this at most electronics stores. This attaches to your existing rear view mirror. Rear view mirror not included.