2004 GMC Sonoma Owner's Manual - Page 139

Low Fuel Warning Light This light comes on briefly when you start your engine. 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. Figure out which radio you have in your vehicle, 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 has 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 Ignition Positions on page 2-17. This light comes on when the fuel tank is low on fuel. To turn if off, add fuel to the fuel tank. See Filling Your Tank on page 5-7. 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 of your vehicle's engine, radio or other systems, and even damage them. Your vehicle's systems may interfere with the operation of sound equipment that has been added improperly. Setting the Time for Radios without Radio Data Systems (RDS) Press and hold HR until the correct hour appears on the display. Press and hold MIN until the correct minute appears on the display. To display the time with the ignition off, press RCL, HR, or MIN and the time will appear on the display for a few seconds. There is an initial two-second delay before the clock goes into time-set mode. 3-35