Automatic Headlamp; System - GMC Savana 2020 Owner's Manual

112 Lighting
The DRL system comes on in
daylight when the following
conditions are met:
The ignition is on.
The exterior lamp control is in
the AUTO position.
The shift lever is not in P (Park).
The light sensor determines it is
daytime.
When the DRL are on, the taillamps,
sidemarker, instrument panel lights,
and other lamps will not be on.
The automatic headlamp system
automatically switches from DRL to
the headlamps depending on the
darkness of the surroundings.
To turn off the DRL, turn the exterior
lamp control to and then
release it.

Automatic Headlamp

System

When it is dark enough outside and
the headlamp switch is in AUTO,
the automatic headlamp system
turns on the headlamps, along with
the taillamps, sidemarker lamps,
parking lamps, and the instrument
panel lights. The radio lights will
also be dim.
To turn off the automatic headlamp
system, turn the exterior lamp
control to the off position and then
release.
The vehicle has a light sensor on
the top of the instrument panel. Do
not cover the sensor; otherwise the
system will come on whenever the
ignition is on.
The system may also turn on the
headlamps when driving through a
parking garage or tunnel.
There is a delay in the transition
between the daytime and nighttime
operation of the Daytime Running
Lamps (DRL) and the automatic
headlamp system so that driving
under bridges or bright overhead
street lights does not affect the
system. The DRL and automatic
headlamp system are only affected
when the light sensor sees a
change in lighting lasting longer
than the delay.
If the vehicle is started in a dark
garage, the automatic headlamp
system comes on immediately.
Once the vehicle leaves the garage,
it takes approximately 30 seconds
for the automatic headlamp system
to change to DRL if it is light
outside. During that delay, the
instrument cluster may not be as
bright as usual. Make sure the
instrument panel brightness control
is in the full bright position. See
Instrument Panel Illumination
Control 0 114.
To idle the vehicle with the
automatic headlamp system off, turn
the control off.