2005 GMC Envoy Owner's Manual - Page 262

Audio Steering Wheel Controls PROG (Program): Press this button to play a station you have programmed on the radio preset pushbuttons. The radio will only seek preset stations with a strong signal that are in the selected band. When a CD is playing in the CD changer, press this button to go to the next available CD, if multiple CDs are loaded. Q SOURCE R: Press this button to switch between FM1, FM2, AM, or XM1 or XM2 (if equipped), or a CD. If a CD is loaded the CD symbol will appear on the display. If your vehicle has this feature, some audio functions can be adjusted at the steering wheel. They include the following: Q SEEK R: Press the up or the down arrow to go to the next or to the previous radio station and stay there. The radio will only seek stations with a strong signal that are in the selected band. When a CD is playing, press the up or the down arrow to fast forward or reverse. g (OnStar/Voice Recognition): If your vehicle has OnStar®, press this button to interact with the OnStar® system. See the OnStar® manual provided with your vehicle for more information. If your vehicle does not have OnStar®, press this button to silence the system. Press it again, or any other radio button, to turn on the sound. Q VOL R (Volume): Press the up or the down arrow to increase or to decrease the volume. 3-126