I am thinking about buying a denali sierra or an avalanche. I havent made a decision yet, still thinking about it. Anyway, I noticed that the avalanche and sierra denali both have the same navigation, however, only the avalanche has the backup camera. It would be a nice feature to have when pulling a boat or trailer. Does anyone know if you could just hook your own backup camera to the existing stock navigation system in the sierra denali ?

 

You can but you will need a video interface. http://www.jpcustoms.com/store/customer/cart.php