Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Yes it can be done. You can add the 8.4 of you want. Only thing that won't work is Bluetooth for calls. You'll be able to receive but not answer the calls. You'll need the mirror and a wiring harness.
Sent from my VS985 4G using Tapatalk

Here you go...Your welcome...
http://www.ramforum.com/f75/diy_5_0_8_4_navigation_upgrade-64564/?highlight=upgrade+swap