Daytime Running Lamps (Drl); Automatic Headlamp System - GMC Hummer EV 2024 Owner's Manual

GMC Hummer EV Owner Manual (GMNA-Localizing-MidEast-16639039) -
2024 - CRC - 3/20/23

Daytime Running Lamps (DRL)

DRL can make it easier for others to see the
front of your vehicle during the day.
The DRL will come on when all of the
following conditions are met:
The vehicle is on.
The exterior lamp control is in AUTO.
The light sensor determines it is daytime.
The taillamps, instrument panel lights, and
other lamps will not turn on when this
feature is activated.
The DRL turns off when the headlamps are
turned to or the vehicle is off.

Automatic Headlamp System

When the exterior lamp control is set to
AUTO and it is dark enough outside, the
headlamps come on automatically.
There is a light sensor on top of the
instrument panel. Do not cover the sensor.
The system may also turn on the headlamps
when driving through a parking garage or
tunnel.
If the vehicle is started in a dark garage, the
automatic headlamp system comes on
immediately. If it is light outside when the
vehicle leaves the garage, there is a slight
delay before the automatic headlamp
system changes to the Daytime Running
Lamps (DRL). 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 0 133.
Lighting
When it is bright enough outside, the
headlamps will turn off or may change
to DRL.
The automatic headlamp system turns off
when the exterior lamp control is turned to
or the vehicle is off.
Lights On with Wipers
If the windshield wipers are activated in
daylight with the vehicle on, and the
exterior lamp control is in AUTO, the
headlamps, parking lamps, and other
exterior lamps come on. The transition time
for the lamps coming on varies based on
wiper speed. When the wipers are not
operating, these lamps turn off. Move the
exterior lamp control to or
this feature.
131
to disable