Chevrolet 2004 Classic, Owner'S Manual, Page: 115 / 348

Exterior Lamps
Headlamps
See “Headlamps” under Turn Signal/Multifunction Lever
on page 3-6.
Daytime Running Lamps (DRL)
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.
The DRL system will make your low-beam headlamps
come on at a reduced brightness when the following
conditions are met:
•
The ignition is on,
•
the exterior lamp control is turned to AUTO or you
have turned on your parking lamps,
•
the light sensor detects daytime light,
•
the parking brake is released, and
•
the shift lever is not in PARK (P).
When the DRL system is on, the taillamps, sidemarker
lamps, parking lamps and instrument panel lights
will not be illuminated unless you have turned the
exterior lamps control to the parking lamp or headlamp
position.
The DRL system will remain off any time your vehicle is
in PARK (P) or the parking brake is engaged and the
vehicle speed is less than 8 mph (13 km/h), for
United States vehicles only.
As with any vehicle, you should turn on the regular
headlamp system when you need it.
Automatic Headlamp System
When it is dark enough outside, your Automatic
Headlamp System will turn on your headlamps at the
normal brightness along with other lamps such as
the taillamps, sidemarker, parking lamps and the
instrument panel lights. The radio lights will also be dim.
Your vehicle is equipped with a light sensor on the
top of the instrument panel under the defroster grill, so
be sure it is not covered which will cause the system
to be on whenever the ignition is on.
The system may also be on when driving through a
parking garage, heavy overcast weather or a tunnel.
This is normal.
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