1995 GMC Yukon Owner's Manual - Page 170

Setting the Clock (Audio Systems with AUTO TONE System) The buttons used to set the clock are located below the AUTO TONE button in the bottom right corner of your audio system. To set the clock: 1. Press and hold HR until the correct hour appears on the display. 2. Press and hold MIN until the correct minute appears on the display. To display the clock with the ignition off, press the recall button. The time will be displayed for a few seconds. There is an initial two-second delay before the clock goes into the time-set mode. How to Operate Your ETW AM-FM Stereo Audio System This part tells you how your ETR'AM-FM Upper Knob (VOL-RECALL) 0 - stereo audiosystem works. The upper knob has these four functions: Turn it to switch the system on and off. Turn it to control the volume. Press it to display the time when the ignition is off. Press it to change between the clock and the radio station frequency displayed when the radio is on. BAL (Balance) - The control ring behind the upper knob adjusts the lefdright speakerbalancc. 3-10