Automatic Headlamp System - GMC Canyon Owner's Manual

Automatic Headlamp System

When it is dark enough outside, the automatic
headlamp system will turn on after the
transmission has been shifted from PARK (P) to
DRIVE (D). The headlamps, taillamps, sidemarker,
parking lamps, roof marker lamps, and the
instrument panel lights will turn on at normal
brightness. The radio lights will become more dim
when the headlights are off compared to when
the headlights are on.
Your vehicle has a light sensor located 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 the headlamps when
driving through a parking garage, heavy overcast
weather, or a tunnel. This is normal.
168
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 will only be affected when the light sensor
detects a change in lighting lasting longer than
the delay.
If you start your vehicle in a dark garage, the
automatic headlamp system will come on
immediately. Once you leave the garage, it will
take about one minute for the automatic headlamp
system to change to DRL if it is light outside.
During that delay, the instrument panel cluster
may not be as bright as usual. Make sure
the instrument panel brightness control is in the
full bright position. See Instrument Panel
Brightness on page 170.