Automatic Headlamp System; Instrument Panel Brightness - GMC 2005 Safari Owner's Manual

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 dim.
Your vehicle is equipped with a light sensor on the top of
the instrument panel in the defroster grille. Be sure it
is not covered, or the system will be on whenever
the ignition is on.
The system may also turn on your headlamps when
driving through a parking garage, heavy overcast
weather or a tunnel. This is normal.
There is a delay in the transition between the daytime
and nighttime operation of the Daytime Running
Lamps (DRL) and the automatic headlamp systems so
that driving under bridges or bright overhead street
lights does not affect the system. The DRL and
automatic headlamp system will only be affected when
the light sensor sees a change in lighting lasting
longer than the delay.
To idle your vehicle with the automatic headlamp
system off, set the parking brake while the ignition is off.
Then start your vehicle. The automatic headlamp
system will stay off until you release the parking brake.
You may be able to turn off your automatic headlamp
system. See Daytime Running Lamps (DRL) on
page 3-16 for more information.
As with any vehicle, you should turn on the regular
headlamps when you need them.

Instrument Panel Brightness

The thumbwheel for this feature is located to the right of
the exterior lamps control. 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.
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