
GMC Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234761) - 2016 - crc - 7/24/15
152 Lighting
this button. Pressing the top of the
button will turn off the roof-mounted
lamp and indicator.
The emergency roof lamp circuit is
fused at 30 amps, so the total
current draw of the attached lamps
should be less than this value. The
attachment points for the roof lamp
circuits are two blunt cut wires
above the overhead console: a dark
green with blue stripe switched
power wire and a black ground wire.
For information on roof-mounted
emergency lamp installation, see
www.gmupfitter.com or contact your
dealer.
If the vehicle has this button, the
vehicle may have the snow plow
prep package. SeeAdd-On
Electrical Equipment 0247.Interior Lighting
Instrument Panel
Illumination Control
This feature controls the brightness
of the steering wheel and instrument
panel lights. The instrument panel
illumination control is next to the
exterior lamp control.
D(Instrument Panel
Illumination) : Move the
thumbwheel up or down to brighten
or dim the lights.
Cargo Lamp
The cargo lamp provides more light
in the cargo area or on the sides of
the vehicle, if needed. The lights
inside the pickup box and/or on the
outside rearview mirrors also turn
on, if equipped.
Press the switch down to turn the
cargo lamp on or off. An indicator
light will turn on when the lamp is
turned on, if equipped. The shift
lever must be in the P (Park)
position to operate the cargo lamp.
The lights on the outside rearview
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GMC Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234761) - 2016 - crc - 7/24/15
Climate Controls 159
Changing the mode cancels the
automatic operation and the system
goes into manual mode. Press
AUTO to return to automatic
operation.
Y(Vent) :Air is directed to the
instrument panel outlets.
\(Bi-Level) : Air is divided
between the instrument panel and
floor outlets. Some air is directed
toward the windshield and side
window outlets.
[(Floor) : Air is directed to the
floor outlets, with some to the
windshield, side window outlets, and
second row floor outlets.
-(Defog) : This mode clears the
windows of fog or moisture. Air is
directed to the windshield, floor
outlets, and side window vents. The
system automatically forces outside
air into the vehicle and the air
conditioning compressor will run,
unless the outside temperature is
close to freezing.
0(Defrost) : Press to clear the
windshield of fog or frost more
quickly. Air is directed to the windshield and the side window
vents. The air conditioning
compressor also comes on, unless
the outside temperature is below
freezing.
Do not drive the vehicle until all
windows are clear.
See
Air Vents 0160.
A/C (Air Conditioning) : Press to
turn the air conditioning system on
or off. An indicator light comes on to
show that the air conditioning is
enabled. If the fan is turned off, the
air conditioner will not run. The A/C
light will stay on even if the outside
temperatures are below freezing.
@(Recirculation) : Press to turn
on recirculation. An indicator light
comes on. Air is recirculated to
quickly cool the inside of the
vehicle. It can also be used to help
reduce outside air and odors that
enter the vehicle. The air
conditioning compressor also comes
on when this mode is activated.
Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog from the
rear window.
K(Rear Window Defogger) :
Press to turn the rear window
defogger on or off. An indicator light
on the button comes on to show that
the rear window defogger is on.
The rear window defogger only
works when the ignition is in ON/
RUN. The defogger turns off if the
ignition is turned to ACC/
ACCESSORY or LOCK/OFF.
Caution
Using a razor blade or sharp
object to clear the inside rear
window can damage the rear
window defogger. Repairs would
not be covered by the vehicle
warranty. Do not clear the inside
rear window with sharp objects.
Heated Mirror : If equipped with
heated outside rearview mirrors, the
mirrors heat to help clear fog or frost
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GMC Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234761) - 2016 - crc - 7/24/15
160 Climate Controls
from the surface of the mirror when
the rear window defog button is
pressed. SeeHeated Mirrors 040.
Sensors
The solar sensor, located in the
defrost grille in the middle of the
instrument panel, monitors the solar
heat. Do not cover the solar sensor
or the system will not work properly.
There is also an exterior
temperature sensor behind the front
grille. This sensor reads the outside
air temperature and helps maintain
the temperature inside the vehicle.
Any cover on the front of the vehicle
including a snow plow, could cause
a false reading in the displayed
temperature. Some vehicles may have the
exterior temperature sensor in the
passenger side mirror instead of the
front grille area.
The climate control system uses the
information from these sensors to
maintain comfort settings by
adjusting the outlet temperature, fan
speed, and the air delivery mode.
The system may also supply cooler
air to the side of the vehicle facing
the sun. The recirculation mode will
also be used as needed to maintain
cool outlet temperatures.
Air Vents
Use the air vents in the center and
on the side of the instrument panel
to direct airflow. Use the
thumbwheels near the air vents to
open or close off the airflow.
Air vents blow warm air on the side
windows in cold weather. If Floor,
Defog, or Defrost modes are
selected, a small amount of air will
come from the vents close to the
window. If the airflow is shut off
using the thumbwheels, warm air
will be directed to the other
instrument panel vents. This is
normal operation.
Use the thumbwheels to turn vent
airflow on or off based on the mode
selected.
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GMC Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234761) - 2016 - crc - 7/24/15
392 Index
Hill Start Assist (HSA) . . . . . . . . . . 208
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
How to Wear Safety BeltsProperly . . . . . . . . . . . . . . . . . . . . . . . . 56
I
Idle SystemFast . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Ignition Positions . . . . . . . . . . . . . . . 185
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . . . 282
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 37
Indicator Vehicle Ahead . . . . . . . . . . . . . . . . .118
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . 75
Infotainment . . . . . . . . . . . . . . . . . . . . 156
Infotainment System . . . . . . . . . . . . 376
Instrument Cluster . . . . . . . . . . . . . . 106
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . 94
Interior Rearview Mirrors . . . . . . . . . 42
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 326
K
Key and Lock Messages . . . . . . . . 129
Keyless EntryRemote (RKE) System . . . . . . . . . 28
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
L
Labeling, Tire Sidewall . . . . . . . . . . 294
Lamps Auxiliary RoofMounted Lamp . . . . . . . . . . . . . . 151
Cargo . . . . . . . . . . . . . . . . . . . . . . . . . 152
Daytime Running (DRL) . . . . . . 149
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 153
Exterior Controls . . . . . . . . . . . . . . 146
Exterior Lamps Off Reminder . . . . . . . . . . . . . . . . . . . 148
Malfunction Indicator . . . . . . . . . .115
Messages . . . . . . . . . . . . . . . . . . . . 129
On Reminder . . . . . . . . . . . . . . . . . 122
Reading . . . . . . . . . . . . . . . . . . . . . . 153
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . 220
Lane Departure Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Lane Keep Assist (LKA) . . . . . . . . 221
Lane Keep Assist Light . . . . . . . . . 118
Lap-Shoulder Belt . . . . . . . . . . . . . . . 56
LATCH System
Replacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . . . 86
LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . . . 80
LED Lighting . . . . . . . . . . . . . . . . . . . . 283
Light Hill Decent Control . . . . . . . . . . . .118
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . 154
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Illumination Control . . . . . . . . . . . 152
LED . . . . . . . . . . . . . . . . . . . . . . . . . . 283
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Airbag Readiness . . . . . . . . . . . . . .113
Antilock Brake System(ABS) Warning . . . . . . . . . . . . . . .117
Brake System Warning . . . . . . . .116
Charging System . . . . . . . . . . . . . .114
Cruise Control . . . . . . . . . . . . . . . . 122
Door Ajar . . . . . . . . . . . . . . . . . . . . . 122
Engine Coolant
Temperature Warning . . . . . . . 120
Engine Oil Pressure . . . . . . . . . . 120
Flash-to-Pass . . . . . . . . . . . . . . . . . 149
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