2003 Chevrolet Avalanche Owner's Manual - Page 174

The DRL system will come on when the following conditions are met: The ignition is on, e Fog Lamps If your vehicle has fog lamps you can use them for better vision in foggy or misty conditions. Your parking lamps and/or low-beam headlamps must be on for your fog lamps to work. The fog lamp button is located on the left side of your instrument panel. the exterior lamps control is in AUTO, the transmission is not in PARK (P), and the light sensor determines it is daytime. When the DRL are on, only your DRL lamps will be on. The taillamps, sidemarker and other lamps won't be on. The instrument panel won't be lit up either. When it begins to get dark, the automatic headlamp system will switch from DRL to the headlamps. As with any vehicle, you should turn on the regular headlamp system when you need it. Puddle Lamps Your vehicle may be equipped with puddle lamps to help you see the area near the base of the front doors when it is dark out. The puddle lamps will illuminate when a door is opened or when you press the unlock button on the keyless entry transmitter. The lamps will time out or turn off once the engine is started. You can program the puddle lamps not to come on if you choose. See Driver lnformation Center (DIC) on page3-46. Press the button to turn the fog lamps on while the headlamps or parking lamps are on. Press the button again to turn them off. An indicator light will glow near the button when the fog lamps are on. Remember, fog lamps alone will not give off as much light as your headlamps. Never use your fog lamps in the dark without turning on the headlamps. The fog lamps will go off whenever your high-beam headlamps come on. When the high beams go off, the fog lamps will come on again. 3-15