2003 Chevrolet Express Van Owner's Manual - Page 136

Lamps Reminder On A reminder chime will sound when your control is turned to the headlamps or parking lamps position, your key isout of the ignition, and your driver's door is open. To disable the chime, turn the control to the Daytime Running Lamp (DRL) position and then back to the parking lamps or headlamps position. The DRL system will come on when conditions are met: the ignition is on, the following the exterior lamps control in DRL mode and not in the defeat position. When the DRL are on, only your headlamps will be on. The taillamps, sidemarker and other lamps won't be on. The instrument panel will be lit. When you turn the headlamp switch off, the headlamps will go off, and your DRL lamps will illuminate. Turn the exterior lamp control to the defeat position or shift into PARK (P). The DRLs will stay off until the control is toggled again or the vehicle is shifted out of PARK (P). This procedure applies only to vehicles first sold in the United States. Daytime Running Lamps Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. DRL can be helpful in many different driving conditions, but they can be especially helpful in the short periods after dawn and before sunset. Fully functional daytime running lamps are required on all vehicles first sold in Canada. 3-13