2004 GMC Sierra 1500 Pickup Owner's Manual - Page 256

Finding a Program Type (PTY) Station (RDS and XM™) To select and find a desired PTY perform the following: 1. Turn the P-TYPE knob to activate program type select mode. TYPE and a PTY will appear on the display. 2. Turn the P-TYPE knob to select a PTY. 3. Once the desired PTY is displayed, press the SEEK TYPE button or one of the SEEK arrows to take you to the PTY's first station. 4. If you want to go to another station within that PTY and the PTY is displayed, press the SEEK TYPE button once. If the PTY is not displayed, press the SEEK TYPE button twice to display the PTY and then to go to another station. 5. Press the P-TYPE knob to exit program type select mode. If PTY times out and is no longer on the display, go back to Step 1. If both PTY and TRAF are on, the radio will search for stations with the selected PTY and traffic announcements. 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. 3-92 SCAN: You can scan the stations within a PTY by performing the following: 1. Turn the P-TYPE knob to activate program type select mode. TYPE and a PTY will appear on the display. 2. Turn the P-TYPE knob to select a PTY. 3. Once the desired PTY is displayed, press either SCAN arrow, and the radio will begin scanning the stations in the PTY. 4. Press either SCAN arrow to stop scanning. If both PTY and TRAF are on, the radio will scan for stations with the selected PTY and traffic announcements. 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.