Chevrolet 2001 Impala Owner's Manual page 123

If you pull the knob out halfway, it will turn on your
parking lamps and your other operating lamps. If you
pull the knob all the way out, your headlamps will then
come on.
Push the knob in all the way to turn off the lamps.
A warning chime will sound if you open the driver's
door when you turn the ignition switch to OFF with
the lamps on.
Daytime Running Lamps / Automatic
Headlamp Control
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 lights are required on all
vehicles first sold in Canada.
A light sensor on top of the instrument panel makes the
DRL work, so be sure it isn't covered.
The DRL system will make your high
come on at a reduced brightness when the following
conditions are met:
D
The ignition is on,
D
the headlamp switch is off and
D
the gearshift is not in PARK (P).
When the DRL are on, only your high
headlamps, at a reduced level of brightness, will be on.
The headlamps, taillamps, sidemarker and other lamps
won't be on. Your instrument panel and cluster won't be
lit up either.
When it's dark enough outside, your high
headlamps will turn off and the headlamps and parking
lamps will turn on. The other lamps that come on with
your headlamps will also come on.
When it's bright enough outside, your headlamps will go
off and your DRL will come on.
As with any vehicle, you should turn on the regular
headlamp system when you need it.
-
beam headlamps
-
beam
-
beam
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