Chevrolet avalanche 2002 Benutzerhandbuch

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.

The DRL system will come on when the following
conditions are met:
D the ignition is on,
D the headlamp switch is in automatic headlamp mode,
D the automatic transmission is not in PARK (P),
D the light sensor determines it is daytime and
D the parking brake is released.
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 or the
last chosen headlamp setting that was used.

When you turn the headlamp switch off, the headlamps
will go off, and your DRL lamps will illuminate,
provided it is not dark outside.

To idle your vehicle with the DRL off, set the parking
brake. Shifting the transmission into PARK (P) will 
also allow you to idle the vehicle with the DRL off. 
The DRL will stay off until you release the parking
brake or shift the transmission out of PARK (P).

When necessary, you may turn off the automatic
headlamp system and the DRL feature by following
these steps:

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 the system
is off. The system will revert back to the automatic
mode when the ignition is turned off and on again.

3. To return to the automatic mode, push the DOME

OVERRIDE button four times within six seconds
(the chime will sound), or turn the ignition off and
on again.

As with any vehicle, you should turn on the regular
headlamp system when you need it.