2003 Chevrolet Tahoe Owner's Manual - Page 221

Audio System(s) Notice: Before you add any sound equipment to your vehicle - like a tape player,CB radio, mobile telephone or two-way radio - be sure you can add what you want. If you can, it's very important to do it properly. Added sound equipment may interfere with the operation your vehicle's engine, of Delphi Electronics radio or other systems, and even damage them. Your vehicle's systems may interfere with the operation sound equipment that of has been added improperly. So, before adding sound equipment, check with your dealer and be sure to check federal rules covering mobile radio and telephone units. Your audio system has been designed to operate easily and to give years of listening pleasure. You will get the most enjoyment out of it if you acquaint yourself with it first. Find out what your audio system can do and how to operate all of its controls to be sure you're getting the most out of the advanced engineering that went into it. Your vehicle may have a feature called Retained Accessory Power (RAP). With RAP, you can play your audio system even after the ignition is turned off. See "Retained Accessory Power (RAP)" under lgnition Positions on page 2-21. Setting the Time for Radios without Radio Data Systems (RDS) Press and hold the HR or MIN arrow for two seconds. Then press the HR (down) arrow until the correct hour appears on the display. Press and hold the MIN (up) arrow until the correct minute appears on the display. The time may be set with the ignition on or off. 3-70