2004 Chevrolet Suburban Owner's Manual - Page 269
2004 Chevrolet Suburban Manual
Page 269 highlights
BAND (Alternate Frequency): Alternate frequency allows the radio to switch to a stronger station with the same program type. To turn alternate frequency on, press and hold BAND for two seconds. AF ON will appear on the display. The radio may switch to stronger stations. To turn alternate frequency off, press and hold BAND again for two seconds. AF OFF will appear on the display. The radio will not switch to other stations. This function does not apply for XM™ Satellite Radio Service. Setting Preset PTYs (RDS Only) The six numbered pushbuttons let you return to your favorite PTYs. These buttons have factory PTY presets. You can set up to 12 PTYs (six FM1 and six FM2) by performing the following steps: 1. Press BAND to select FM1 or FM2. 2. Press the P-TYPE button to activate program type select mode. P-TYPE and the last selected PTY will appear on the display. 3. Turn the P-TYPE knob to select a PTY. 4. Press and hold one of the six numbered pushbuttons until you hear a beep. Whenever you press that numbered pushbutton, the PTY you set will return. 5. Repeat the steps for each pushbutton. 3-113