GMC 2011 Sierra - Manual (Page 218)

Black plate (2,1) GMC Sierra Owner Manual - 2011
6-2 Lighting
The exterior lamps control has four
positions:
O (Off): Turns off the automatic
headlamps and daytime running
lamps (DRL). Turn the headlamp
control to the off position again to
turn the automatic headlamps or
DRL back on.
For vehicles first sold in Canada,
the off position will only work when
the vehicle is shifted into P (Park).
AUTO (Automatic): Automatically
turns on the headlamps at normal
brightness, together with the
following:
. Parking Lamps
. Instrument Panel Lights
. Taillamps
. License Plate Lamps
. Roof Marker Lamps
(If Equipped)
When the vehicle is turned off
and the headlamps are in AUTO,
the headlamps may automatically
remain on for a set time. The time of
the delay can be changed using the
DIC. See Driver Information Center
(DIC) on page 5‑33.
; (Parking Lamps): Turns on
the parking lamps together with
the following:
. Instrument Panel Lights
. Taillamps
. License Plate Lamps
. Roof Marker Lamps
(If Equipped)
2 (Headlamps): Turns on the
headlamps together with the
following:
. Parking Lamps
. Instrument Panel Lights
. Taillamps
. License Plate Lamps
. Roof Marker Lamps
(If Equipped)
When the headlamps are turned
on while the vehicle is on, the
headlamps turn off automatically
10 minutes after the ignition is
turned off. When the headlamps
are turned on while the vehicle
is off, the headlamps will stay
on for 10 minutes before
automatically turning off to prevent
the battery from being drained.