2009 GMC Envoy Owner's Manual - Page 195

Notice: Contact your dealer/retailer before adding any equipment. Adding audio or communication equipment could interfere with the operation of the vehicle's engine, radio, or other systems, and could damage them. Follow federal rules covering mobile radio and telephone equipment. Notice: The chime signals related to safety belts, parking brake, and other functions of your vehicle operate through the radio/entertainment system. If that equipment is replaced or additional equipment is added to your vehicle, the chimes may not work. Make sure that replacement or additional equipment is compatible with your vehicle before installing it. See Accessories and Modifications on page 5-3. The vehicle has Retained Accessory Power (RAP). With RAP, the audio system can be played even after the ignition is turned off. See Retained Accessory Power (RAP) on page 2-22 for more information. Setting the Clock The clock can be set with the ignition on or off. The radio may have a button marked with an H or HR to represent hours and an M or MN to represent minutes. Press and hold the hour button until the correct hour displays. AM or PM displays for morning or evening hours. Press and hold the minute button until the correct minute displays. To synchronize the time with an FM station broadcasting Radio Data System (RDS) information, press and hold the hour and minute buttons at the same time until UPDATED and the clock symbol appear on the display. If the time is not available from the station, NO UPDATE or NO UPDAT will appear on the display. RDS time is broadcast once a minute. After tuning to an RDS broadcast station, it could take a few minutes for the time to update. 3-63