2002 Chevrolet Impala Owner's Manual - Page 201

A VOL " (Volume): Turn this knob clockwise to increase volume when RDS interrupts regular play. Turn it counterclockwise to decrease volume. DISP (Display): Press this knob to change what appears on the display while using RDS. Pressing this knob will also display an RDS station frequency or program type when the radio is on. The display options are station name, station frequency, PTY and the name of the program (if available). Pressing and holding this knob will activate the RDS default display. Finding a PTY Station BAND (Alternate Frequency): Alternate frequency allows the radio to switch to a stronger station with the same program type. Press and hold BAND for two seconds to turn alternate frequency on. AF ON will appear on the display. The radio may switch to stronger stations. Press and hold BAND again for two seconds to turn alternate frequency off. AF OFF will appear on the display. The radio will not switch to other stations. When you turn the ignition off and then on again, the alternate frequency feature will automatically be turned on. SEEK TYPE: Press this button to go to a station with the last selected PTY; TYPE and the last selected PTY will appear on the display, if it is not already showing. Press SEEK TYPE a second time to seek. If a station with the selected PTY is not found, the radio will return to the original station and display NONE. P-TYPE LIST (Program Type): Turn this knob clockwise or counterclockwise to select the Program Type (PTY) you want to listen to. TYPE and a PTY will appear on the display. Press the SEEK TYPE button and the radio will seek to the first RDS broadcaster of the selected program type. If the radio cannot find the desired program type, NONE will appear on the display and the radio will return to the last station you were listening to. 3-29