2004 GMC Sierra 1500 Pickup Owner's Manual - Page 261

If you want to insert a tape while the ignition is off, first press the eject button or the DISPL knob. Cassette tape adapter kits for portable CD players will work in your cassette tape player. Your tape bias is set automatically when a metal or chrome tape is inserted. If an error appears on the display, see "Cassette Tape Messages" later in this section. 1 PREV (Previous): Your tape must have at least three seconds of silence between each selection for previous to work. Press this pushbutton to go to the previous selection on the tape if the current selection has been playing for less than three seconds. If pressed when the current selection has been playing from 3 to 13 seconds, it will go to the beginning of the previous selection or the beginning of the current selection, depending upon the position on the tape. If pressed when the current selection has been playing for more than 13 seconds, it will go to the beginning of the current selection. SEEK and a negative number will appear on the display while the cassette player is in the previous mode. Pressing this pushbutton multiple times will increase the number of selections to be searched back, up to -9. 2 NEXT: Your tape must have at least three seconds of silence between each selection for next to work. Press this pushbutton to go to the next selection on the tape. If you press the pushbutton more than once, the player will continue moving forward through the tape. SEEK and a positive number will appear on the display. 3 REV (Reverse): Press this pushbutton to reverse the tape rapidly. Press this pushbutton again to return to playing speed. The radio will play while the tape reverses. The station frequency and REV will appear on the display. You may select stations during reverse operation by using TUNE and SEEK. 4 FWD (Forward): Press this pushbutton to advance the tape rapidly. Press this pushbutton again to return to playing speed. The radio will play while the tape advances. The station frequency and FWD will appear on the display. You may select stations during forward operation by using TUNE and SEEK. 5 SIDE: Press this pushbutton to play the other side of the tape. q SEEK r: The right arrow is the same as the NEXT pushbutton, and the left arrow is the same as the PREV pushbutton. If you hole either arrow or press it more than once, the player will continue moving forward or backward through the tape. SEEK and a positive or negative number will appear on the display. 3-97