Originally Posted by GTyankee
It may help if you get the 3 letters on the radios face, lower right corner
RES 730n, most expensive with Navagation
RBZ 430n, has Navigation
RHB 430, no Navigation
RES 130, no screen, no Navigation, base radio
some of these radios have had a recent Gracenotes upgrade, i believe that is the sound
your radio may have already received this update
Most dealerships have not heard about it yet
You got the RBZ and RHB mixed up. RBZ has no navigation, RHB does.
To the OP, I'm in the same boat. I have a set of Kicker DS693s for the doors and 3.5s for the dash coming next week. Not interested in an aftermarket radio or in adding amps and a subwoofer, just want something better than the stockers. WIll post a DIY/review once everything gets here.