2003 GMC Safari Owner's Manual - Page 140

When it begins to get dark, the automatic headlamp system will switch from DRL to the headlamps or the last chosen headlamp setting that was used. To idle your vehicle with DRL off, put the transmission the in PARK (P). The DRL will stay until you shift out off of PARK (P). The following does not apply to vehicles first sold in Canada. Interior Lamps Instrument Panel Brightness Control The thumbwheel for this feature is located to the right of the exterior lamps control. (Instrument Panel Brightness): Turn the thumbwheel up to brighten the lights or down to dim them. Moving the thumbwheel up to the first position will activate the interior dome lamps. When necessary, you may turn off the automatic headlamp system and the Daytime Running Lamps (DRL) feature by following the steps below: 1. Turn the ignition to RUN. 2. Press the DOME OVERRIDE button four times within six seconds. After the fourth press of the button, a chime will sound informing you that the system is off. Exit Lighting With exit lighting, the interior lamps willcome on when you remove the key from the ignition.The lights will not come on if the DOME OVERRIDE button is pressed in. Entry Lighting Your vehicle is equipped with an illuminated entry feature. When a door is opened, the dome lamps will come on if the DOME OVERRIDE button is in the out position. When all the doors are closed, the lamps will stay on for a short period of time and will then go out. If the DOME OVERRIDE button is pressed in, the lamps will not come on. To return to the automatic mode, push the DOME OVERRIDE button four times within six seconds (the chime will sound), or turn the ignition to off and then to RUN again. As with any vehicle, you should turn on the regular headlamp system when you need it. 3-15