If it is installed and functional then the easiest way to tell is to hit the MENU button on the nav screen and if "Television" is listed then you have the TV module. If it isn't listed then it is more than likely not installed.

Physically it is located down in the spare tire well next to the radio module (assuming that it is installed, of course)

All that is involved in installing it is having the TV tuner and a cable that goes between the nav drive and the TV module. If you have the TV module then you can display DVD's and have a backup cam. But viewing TV isn't an option since analog broadcasts are a thing of the past.

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