1995 GMC Yukon Owner's Manual - Page 169

Your vehicle has air vents in the center and on the sides of your instrument panel. You can move the vents from sideto side or up and down to direct the flow of air, or close the vents altogether. When you close a vent, it will increase the flow of air coming outof any vents that are open. Audio Systems Your DelcoB audiosystem has been designed to operate easily and give years of listening pleasure. But you will get the most enjoyment out of it if you acquaint yourself with it first. Find out what your Delco@systemcan do and how to operate all its controls, to be sure you're getting the most out of the advanced engineering that went into it. Setting the Clock (Audio Systems without AUTO TONE System) To set the clock: 1. Press the SET button. 2. Within 5 seconds, press and hold SEEK appears on the display. until the correct minute 3. Press and hold 4 SEEK until the correct hour appears on the display. To display the clock with the ignition off, press the upper knob. The time will be displayed for a few seconds. 3-9