2005 GMC Yukon Owner's Manual - Page 281

PROG (Program): Press this button to go to the next preset radio station set on the pushbuttons on the main radio. This function is inactive if the front seat passengers are listening to the radio. When a cassette tape is playing, press this button to go to the other side of the tape. This function is inactive if the front seat passengers are listening to a cassette tape. When a CD is playing, press this button to go to the beginning of the CD. This function is inactive if the front seat passengers are listening to a CD. When a CD is playing in the six-disc CD changer, press this button to select the next CD, if multiple CDs are loaded. This function is inactive if the front seat passengers are listening to a CD. Audio Steering Wheel Controls Theft-Deterrent Feature THEFTLOCK® is designed to discourage theft of your vehicle's radio. The feature works automatically by learning a portion of the Vehicle Identification Number (VIN). If the radio is moved to a different vehicle, it will not operate and LOCKED will appear on the display. When the radio and vehicle are turned off, the blinking red light indicates that THEFTLOCK® is armed. With THEFTLOCK® activated, the radio will not operate if stolen. If your vehicle has this feature, some audio controls can be adjusted at the steering wheel. They include the following: g (OnStar/Mute): 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. 3-131