Gator Oldie, at the top of your display do you see the tabs for each section of the display screens?
The first tab at the top is the Default view (it's tab looks like a speedometer), Pressing the Mode button Once will move to the Audio section(Looks like a Speaker), (The CB section is third, Trip meter is 4th, and Settings section is 5th tab across the top) just to the left of the temp and time (if they're all enabled).

When in the Audio section, it should normally default to FM or whatever the last set Audio Type was, FM, AM, WX, AuX, XM(if equipped). Pressing the SET button within this Tab cycles through the available audio inputs. Once you're on FM or AM is where you could "tune" to a receivable station, assuming of course your antenna is mounted properly and connected properly (either being not the case could cause no reception).
When you're in the FM section (like depicted above) Pressing the left right arrow shortly, will just cycle through the preset FM channels (if there are any presets that you can receive).
PRESSING AND HOLDING the left or right arrow for more than one second will seek for receivable stations. Once you're receiving a station it will stop seeking, you can then SET it as a preset by holding the SET button for more than 1 second, or just listen to it.