Automatic Headlamp System - GMC 2004 Envoy Owner's Manual

Exterior Lamps
c
(Off): Turn the knob to this symbol and release it
to turn off the Daytime Running Lamps (DRL) and
the automatic headlamps. An indicator will illuminate
when the position is selected. This position is not
available for vehicles first sold in Canada.
i
(Automatic DRL/AHS): Turning the knob to this
symbol puts the system into automatic headlamp mode.
An indicator will illuminate when the position is selected.
; (Parking Lamps): Turn the knob to this symbol to
manually turn on the following:
•
Parking Lamps
•
Sidemarker Lamps
3-16
Your exterior lamps
knob is located on your
instrument panel to the
left of the steering wheel.
•
Taillamps
•
License Plate Lamps
•
Instrument Panel Lights
2 (Headlamps): Turn the knob to this symbol to turn
on all the lamps listed as well as the headlamps.

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 on.
Your vehicle is equipped with a light sensor on the
top of the instrument panel. Be sure it is not covered or
the system will be on whenever the ignition is on.
The system may also turn on your lights 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.