2018 GMC SIERRA DENALI trailer

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
In Brief 71. Instrument Panel Illumination
Control 0 182 .
2. Integrated Trailer Brake Control
(ITBC) System (If Equipped).
See Towing Equipment 0 325 .
3. Exterior Lamp Controls 0 176 .
Fog Lamps 0 181 (If
Equipped).
4. Air Vents 0 231 .
5. Turn Signal Lever. See Turn
and Lane-Change Signals
0 181 .
Windshield Wiper/Washer
0 130 .
6. Favorite Switches (Out of
View). See Steering Wheel
Controls 0 129 .
Volume Switches (Out of View).
See Steering Wheel Controls
0 129 .
7. Instrument Cluster 0 138 .
8. Hazard Warning Flashers
0 180 .
9. Shift Lever. See Automatic
Transmission 0 265 . Tow/Haul Selector Button (If
Equipped). See Tow/Haul
Mode 0 271 .
Range Selection Mode (If
Equipped). See Manual Mode
0 268 .
10. Light Sensor. See Automatic
Headlamp System 0 179 .
11. Infotainment 0 186 .
12. Passenger Airbag On-Off
Switch (If Equipped) (Out of
View). See Airbag On-Off
Switch 0 84 .
13. Heated and Ventilated Front
Seats 0 65 (If Equipped).
14. Power Outlet 110/120V
Alternating Current (If
Equipped). See Power Outlets
0 133 .
15. Power Outlets 0 133 (If
Equipped).
16. USB Port 0 197 (If Equipped).
17.
g Traction Control/Electronic
Stability Control 0 282 .0 Pedal Adjust Switch (If
Equipped). See Adjustable
Throttle and Brake Pedal
0 256 .
{ Cargo Lamp 0 183 .
X Parking Assist Button (If
Equipped). See Assistance
Systems for Parking or Backing
0 289 .
A Lane Keep Assist (LKA)
(1500 Series) 0 297 (If
Equipped).
5 Hill Descent Control Switch
(If Equipped). See Hill Descent
Control (HDC) 0 284 .
q Exhaust Brake Switch (If
Equipped). See “ Exhaust
Brake ” in the Duramax diesel
supplement.
g Power Take Off (PTO)
Switch (If Equipped). See the
Duramax diesel supplement.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
24 In Brief Automatic Transfer Case
This transfer case knob is to the left
of the steering column.
The different drive options that may
be available are described following.
2
m (Two-Wheel Drive High) : This
setting is used for driving in most
street and highway situations.
AUTO (Automatic Four-Wheel
Drive) : This setting is ideal for use
when road surface traction
conditions are variable. Do not use AUTO mode to park on
a steep grade with poor traction
such as ice, snow, mud or gravel. In
AUTO mode only the rear wheels
will hold the vehicle from sliding
when parked. If parking on a steep
grade, use 4
m to keep all four
wheels engaged.
4
m (Four-Wheel Drive High) : Use
this setting when extra traction is
needed, such as on snowy or icy
roads or in most off-road situations.
N (Neutral) : Shift to this setting
only when towing the vehicle.
See Recreational Vehicle Towing
0 430 or Trailer Towing 0 307 .
4
n (Four-Wheel Drive Low) : This
setting sends maximum power to all
four wheels. Choose 4
n when
driving in deep sand, mud, or snow,
and while climbing or descending
steep hills.
See Four-Wheel Drive 0 272 .Vehicle Features Infotainment System The base radio and base radio with
touchscreen information is included
in this manual. See the infotainment
manual for information on the
uplevel radios, audio players,
phone, navigation system, Rear
Seat Entertainment (RSE), and
voice or speech recognition,
if equipped.
Radio(s) Base Radio
O : Press to turn the system on.
Press and hold to turn it off. When
on, press to mute; press again to
unmute. Turn to increase or
decrease the volume.
RADIO : Press to choose between
FM, AM, and SiriusXM, if equipped.
MEDIA : Press to change the audio
source between CD, USB, AUX,
and Bluetooth Audio, if equipped.
{ : Press to go to the Home Page.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
34 Keys, Doors, and Windows
Keys, Doors, and
Windows Keys and Locks Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Remote Keyless Entry (RKE)
System . . . . . . . . . . . . . . . . . . . . . . . 37
Remote Keyless Entry (RKE)
System Operation . . . . . . . . . . . . 37
Remote Vehicle Start . . . . . . . . . . 39
Door Locks . . . . . . . . . . . . . . . . . . . . 40
Power Door Locks . . . . . . . . . . . . . 41
Automatic Door Locks . . . . . . . . . 41
Lockout Protection . . . . . . . . . . . . . 42
Safety Locks . . . . . . . . . . . . . . . . . . . 42
Doors Tailgate . . . . . . . . . . . . . . . . . . . . . . . . 43
Power Assist Steps . . . . . . . . . . . . 43
Vehicle Security Vehicle Security . . . . . . . . . . . . . . . . 44
Vehicle Alarm System . . . . . . . . . 44
Immobilizer . . . . . . . . . . . . . . . . . . . . 46
Immobilizer Operation . . . . . . . . . 46
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 47
Manual Mirrors . . . . . . . . . . . . . . . . . 47 Trailer-Tow Mirrors . . . . . . . . . . . . . 48
Power Mirrors . . . . . . . . . . . . . . . . . . 48
Folding Mirrors . . . . . . . . . . . . . . . . . 49
Heated Mirrors . . . . . . . . . . . . . . . . . 50
Automatic Dimming Mirror . . . . . 50
Blind Spot Mirrors . . . . . . . . . . . . . . 50
Reverse Tilt Mirrors . . . . . . . . . . . . 51
Interior Mirrors Interior Rearview Mirrors . . . . . . . 51
Manual Rearview Mirror . . . . . . . . 52
Automatic Dimming Rearview
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 52
Windows Windows . . . . . . . . . . . . . . . . . . . . . . . 52
Manual Windows . . . . . . . . . . . . . . 52
Power Windows . . . . . . . . . . . . . . . 52
Rear Windows . . . . . . . . . . . . . . . . . 54
Sun Visors . . . . . . . . . . . . . . . . . . . . . 55
Roof Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 55 Keys and Locks Keys
{ WarningLeaving children in a vehicle with
the ignition key is dangerous and
children or others could be
seriously injured or killed. They
could operate the power windows
or other controls or make the
vehicle move. The windows will
function with the keys in the
ignition, and children or others
could be caught in the path of a
closing window. Do not leave
children in a vehicle with the
ignition key.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
48 Keys, Doors, and Windows Using hood-mounted air deflectors
and add-on convex mirror
attachments could decrease mirror
performance.
Trailer-Tow Mirrors
If equipped, adjust trailer-tow
mirrors for a clear view of the area
behind you. Manually pull out the
mirror head to extend it for better
visibility when towing a trailer.
The lower portion of the mirror is
convex. A convex mirror's surface is
curved to see more from the driver seat. The convex mirror can be
adjusted manually to the driver
preferred position for better vision.
The mirror may have a turn signal
arrow that flashes in the direction of
the turn or lane change.
Power Mirrors Using hood-mounted air deflectors
and add-on convex mirror
attachments could decrease mirror
performance.
Base Power Mirrors
The power mirror controls are on the
driver door. 1. Press (1) or (2) to select the
driver or passenger side mirror.
2. Press one of the four arrows on
the control pad to move the
mirror in the desired direction.
3. Adjust each outside mirror so
that a little of the vehicle and
the area behind it can be seen.
4. Move the selector switch to the
center position when not
adjusting either outside mirror.
Crew/Double Cab Premium
Shown, Other Models Similar
1. Press (1) or (2) to select the
driver or passenger side mirror.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
50 Keys, Doors, and Windows Auto Mirror Folding If equipped, with the ignition off,
press and hold
Q on the RKE
transmitter for approximately
one second to automatically fold the
exterior mirrors. Press and hold
Kon the RKE transmitter for
approximately one second to unfold.
See Remote Keyless Entry (RKE)
System Operation 0 37 .
This feature is turned on or off
through vehicle personalization. See
Vehicle Personalization 0 165 .
Turn Signal Indicator If equipped, indicator lights on the
mirror flash in the direction of the
turn or lane change.
Heated Mirrors If equipped with heated mirrors:
K : Press to heat the outside
mirrors. If the vehicle has trailer-tow
mirrors, only the upper glass of the
mirror is heated. The lower convex
part of the trailer-tow mirrors is not
heated. See “ Rear Window Defogger ” under
Dual Automatic Climate Control
System 0 228 .
Automatic Dimming
Mirror If equipped, the driver outside mirror
automatically adjusts for the glare of
the headlamps from behind. This
feature comes on when the vehicle
is started.
Blind Spot Mirrors If equipped, there is a small convex
mirror built into the upper and outer
corner of the driver outside mirror.
It can show objects that may be in
the vehicle's blind zone. Driving with the Blind Spot
Mirror
Actual Mirror View

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Instruments and Controls 151If towing a trailer, reduce the
amount of cargo being hauled as
soon as possible.
If the light continues to flash, find a
safe place to park. Turn the vehicle
off and wait at least 10 seconds
before restarting the engine. If the
light is still flashing, follow the
previous guidelines and see your
dealer for service as soon as
possible.
If the light is on steady : A
malfunction has been detected.
Diagnosis and service may be
required.
Check the following:
.
A loose or missing fuel cap may
cause the light to come on. See
Filling the Tank 0 301 . A few
driving trips with the cap
properly installed may turn the
light off.
.
Poor fuel quality can cause
inefficient engine operation and
poor driveability, which may go
away once the engine is warmed
up. If this occurs, change the
fuel brand. It may require at least one full tank of the proper
fuel to turn the light off. See Fuel
0 299 .
If the light remains on, see your
dealer.
Emissions Inspection and
Maintenance Programs If the vehicle requires an Emissions
Inspection/Maintenance test, the
test equipment will likely connect to
the vehicle's Data Link
Connector (DLC).
The DLC is under the instrument
panel to the left of the steering
wheel. Connecting devices that are
not used to perform an Emissions
Inspection/Maintenance test or to
service the vehicle may affect
vehicle operation. See Add-On
Electrical Equipment 0 336 . See
your dealer if assistance is needed. The vehicle may not pass
inspection if:
.
The light is on when the engine
is running.
.
The light does not come on
when the ignition is on while the
engine is off.
.
Critical emission control systems
have not been completely
diagnosed. If this happens, the
vehicle would not be ready for
inspection and might require
several days of routine driving
before the system is ready for
inspection. This can happen if
the 12-volt battery has recently
been replaced or run down, or if
the vehicle has been recently
serviced.
See your dealer if the vehicle will
not pass or cannot be made ready
for the test.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
158 Instruments and Controls
Cruise Control Light For vehicles with cruise control, the
cruise control light is white when the
cruise control is on and ready, and
turns green when the cruise control
is set and active.
The light turns off when the cruise
control is turned off. See Cruise
Control 0 285 . Door Ajar Light This light comes on when a door is
open or not securely latched. Before
driving, check that all doors are
properly closed.
Information Displays Driver Information Center
(DIC) (Base Level Cluster) The DIC displays are shown in the
center of the instrument cluster. The
displays show the status of many
vehicle systems. The trip odometer
reset stem in the instrument cluster
is used to access the DIC menu
items.
DIC Menu Items Turn the trip odometer reset stem to
scroll through the following menu
items:
.
Digital Speedometer
.
Trip
.
Fuel Range
.
Average Fuel Economy
.
Tire Pressure
.
Remaining Oil Life
.
Transmission Fluid Temperature
.
Trailer Brake
.
Hourmeter

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
160 Instruments and Controls Transmission Fluid Temperature
The temperature of the automatic
transmission fluid displays in either
degrees Celsius (°C) or degrees
Fahrenheit (°F).
Trailer Brake
On vehicles with the Integrated
Trailer Brake Control (ITBC) system,
turn the trip odometer reset stem
until TRAILER GAIN and TRAILER
OUTPUT displays.
TRAILER GAIN shows the Trailer
Gain setting. This setting can be
adjusted from 0.0 to 10.0 with either
a trailer connected or disconnected.
TRAILER OUTPUT shows the
power output to the trailer anytime a
trailer with electric brakes is
connected. Output is displayed as a
bar graph. Dashes may appear in
the TRAILER OUTPUT display if a
trailer is not connected.
Hourmeter
This display shows the total number
of hours the engine has run. Unit
This will change the displays on
the instrument cluster and DIC to
either metric or English (US)
measurements. To change the units,
press the trip odometer reset stem
when UNITS is displayed to enter
the Unit menu. Turn the trip
odometer reset stem to switch
between English and metric. Press
the trip odometer reset stem when
the desired setting is displayed.
Compass The vehicle may have a compass in
the Driver Information Center (DIC).
See Compass 0 131 .
Driver Information Center
(DIC) (Uplevel and Denali
Cluster) The DIC displays are shown in the
center of the instrument cluster in
the Info App. See Instrument Cluster
0 138 . The displays show the status
of many vehicle systems. The
controls for the DIC are on the right
steering wheel control. w or
x : Press to move up or
down in a list.
o or
p : Press to move between
the interactive display zones in the
cluster.
V : Press to open a menu or select
a menu item. Press and hold to
reset values on certain screens.
DIC Info Page Options
The info pages on the DIC can be
turned on or off through the
Options menu.
1. Press
o to access the cluster
applications.