HD Radio is turned on by going thru the set-up function of the radio, minus the NAVIGATION units, where this feature is deleted. Once on, it does sound better, much more equal sounding thru-out the cabin.
Not all radio stations are broadcasting in HD. If you have it on, and they are broadcasting in HD, the radio will sound like it 'skipped' when it changes over to HD (which it does automatically). The artist/song will appear in the screen and the little HD1 will show up in the right side of the display. Once this mode appears, you can hit the 'TUNE' button up/down and if the station has more than one HD signal, it will tune these in as well, with the appropriate HD2 or HD3 displaying.
Remember, once you have the function turned on in the radio set-up, it is automatic from there on out.
SR Deluxe Strut Bar
Tint - Llumar (35/15/80)
LED Cupholder Illumination