manual transmission GMC SIERRA DENALI 2015 Owners Manual

Black plate (1,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
2015 GMC Sierra Denali Owner Manual MIn Brief . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Instrument Panel . . . . . . . . . . . . . . 1-2
Initial Drive Information . . . . . . . . 1-4
Vehicle Features . . . . . . . . . . . . . 1-16
Performance and
Maintenance . . . . . . . . . . . . . . . . 1-20
Keys, Doors, and
Windows . . . . . . . . . . . . . . . . . . . . 2-1
Keys and Locks . . . . . . . . . . . . . . . 2-1
Doors . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Vehicle Security . . . . . . . . . . . . . . 2-11
Exterior Mirrors . . . . . . . . . . . . . . . 2-14
Interior Mirrors . . . . . . . . . . . . . . . . 2-19
Windows . . . . . . . . . . . . . . . . . . . . . 2-19
Roof . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Seats and Restraints . . . . . . . . . 3-1
Head Restraints . . . . . . . . . . . . . . . 3-2
Front Seats . . . . . . . . . . . . . . . . . . . . 3-3
Rear Seats . . . . . . . . . . . . . . . . . . . . 3-9
Safety Belts . . . . . . . . . . . . . . . . . . 3-10
Airbag System . . . . . . . . . . . . . . . . 3-17
Child Restraints . . . . . . . . . . . . . . 3-30 Storage . . . . . . . . . . . . . . . . . . . . . . . 4-1
Storage Compartments . . . . . . . . 4-1
Additional Storage Features . . . 4-3
Instruments and Controls . . . . 5-1
Controls . . . . . . . . . . . . . . . . . . . . . . . 5-2
Warning Lights, Gauges, and
Indicators . . . . . . . . . . . . . . . . . . . . 5-8
Information Displays . . . . . . . . . . 5-27
Vehicle Messages . . . . . . . . . . . . 5-31
Vehicle Personalization . . . . . . . 5-42
Universal Remote System . . . . 5-49
Lighting . . . . . . . . . . . . . . . . . . . . . . . 6-1
Exterior Lighting . . . . . . . . . . . . . . . 6-1
Interior Lighting . . . . . . . . . . . . . . . . 6-6
Lighting Features . . . . . . . . . . . . . . 6-8
Infotainment System . . . . . . . . . 7-1
Introduction . . . . . . . . . . . . . . . . . . . . 7-1 Climate Controls . . . . . . . . . . . . . 8-1
Climate Control Systems . . . . . . 8-1
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 8-4
Maintenance . . . . . . . . . . . . . . . . . . . 8-5
Driving and Operating . . . . . . . . 9-1
Driving Information . . . . . . . . . . . . . 9-2
Starting and Operating . . . . . . . 9-23
Engine Exhaust . . . . . . . . . . . . . . 9-32
Automatic Transmission . . . . . . 9-33
Drive Systems . . . . . . . . . . . . . . . . 9-40
Brakes . . . . . . . . . . . . . . . . . . . . . . . 9-46
Ride Control Systems . . . . . . . . 9-49
Cruise Control . . . . . . . . . . . . . . . . 9-52
Driver Assistance Systems . . . 9-55
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 9-63
Trailer Towing . . . . . . . . . . . . . . . . 9-68
Conversions and Add-Ons . . . 9-88
Vehicle Care . . . . . . . . . . . . . . . . . 10-1
General Information . . . . . . . . . . 10-2
Vehicle Checks . . . . . . . . . . . . . . . 10-3
Headlamp Aiming . . . . . . . . . . . 10-36
Bulb Replacement . . . . . . . . . . 10-36
Electrical System . . . . . . . . . . . . 10-40
Wheels and Tires . . . . . . . . . . . 10-50

Black plate (1,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
In Brief 1-1
In Brief Instrument Panel Instrument Panel . . . . . . . . . . . . . . 1-2
Initial Drive Information Remote Keyless Entry (RKE)
System . . . . . . . . . . . . . . . . . . . . . . 1-4
Remote Vehicle Start . . . . . . . . . 1-5
Door Locks . . . . . . . . . . . . . . . . . . . 1-5
Windows . . . . . . . . . . . . . . . . . . . . . . 1-6
Seat Adjustment . . . . . . . . . . . . . . 1-7
Memory Features . . . . . . . . . . . . . 1-8
Heated and Cooled Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Head Restraint Adjustment . . . . 1-9
Safety Belts . . . . . . . . . . . . . . . . . . . 1-9
Passenger Sensing System . . . 1-9
Mirror Adjustment . . . . . . . . . . . . 1-10 Steering Wheel
Adjustment . . . . . . . . . . . . . . . . . 1-11
Throttle and Brake Pedal
Adjustment . . . . . . . . . . . . . . . . . 1-12
Interior Lighting . . . . . . . . . . . . . . 1-12
Exterior Lighting . . . . . . . . . . . . . 1-13
Windshield Wiper/Washer . . . . 1-13
Climate Controls . . . . . . . . . . . . . 1-14
Transmission . . . . . . . . . . . . . . . . 1-15
Four-Wheel Drive . . . . . . . . . . . . 1-15
Vehicle Features Infotainment System . . . . . . . . . 1-16
Steering Wheel Controls . . . . . 1-16
Cruise Control . . . . . . . . . . . . . . . 1-17
Driver Information
Center (DIC) . . . . . . . . . . . . . . . 1-17
Forward Collision Alert (FCA)
System . . . . . . . . . . . . . . . . . . . . . 1-18 Lane Departure
Warning (LDW) . . . . . . . . . . . . . 1-18
Rear Vision
Camera (RVC) . . . . . . . . . . . . . 1-18
Parking Assist . . . . . . . . . . . . . . . 1-18
Power Outlets . . . . . . . . . . . . . . . 1-18
Universal Remote System . . . 1-19
Sunroof . . . . . . . . . . . . . . . . . . . . . . 1-19
Performance and Maintenance Traction Control/Electronic
Stability Control . . . . . . . . . . . . 1-20
Tire Pressure Monitor . . . . . . . . 1-20
Engine Oil Life System . . . . . . 1-21
E85 or FlexFuel . . . . . . . . . . . . . . 1-21
Driving for Better Fuel
Economy . . . . . . . . . . . . . . . . . . . 1-21
Roadside Assistance
Program . . . . . . . . . . . . . . . . . . . . 1-22
OnStar ®
. . . . . . . . . . . . . . . . . . . . . 1-22

Black plate (3,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
In Brief 1-31. Instrument Panel Illumination
Control on page 6-6 .
2. Integrated Trailer Brake Control
(ITBC) System (If Equipped).
See Towing Equipment on
page 9-78 .
3. Exterior Lamp Controls on
page 6-1 .
Fog Lamps on page 6-5 (If
Equipped).
4. Air Vents on page 8-4 .
5. Turn Signal Lever. See Turn and
Lane-Change Signals on
page 6-4 .
Windshield Wiper/Washer on
page 5-3 .
6. Favorite Switches (Out of View).
See Steering Wheel Controls on
page 5-2 .
Volume Switches (Out of View).
See Steering Wheel Controls on
page 5-2 .
7. Instrument Cluster on page 5-9 . 8. Hazard Warning Flashers on
page 6-4
9. Shift Lever. See Automatic
Transmission on page 9-33 .
Tow/Haul Selector Button (If
Equipped). See Tow/Haul Mode
on page 9-39 .
Range Selection Mode (If
Equipped). See Manual Mode on
page 9-36 .
10. Light Sensor. See Automatic
Headlamp System on
page 6-3 .
11. Infotainment on page 7-1 .
12. Electronic Transfer Case
Control (If Equipped). See
Four-Wheel Drive on
page 9-40 .
13. Parking Brake on page 9-47 .
14. Data Link Connector (DLC)
(Out of View). See Malfunction
Indicator Lamp on page 5-18 . 15. Cruise Control on page 9-52 .
Forward Collision Alert (FCA)
System on page 9-59 (If
Equipped).
16. Steering Wheel Adjustment on
page 5-2 (Out of View).
17. Horn on page 5-3 .
18. Hood Release. See Hood on
page 10-4 .
19. Steering Wheel Controls on
page 5-2 (If Equipped).
Driver Information Center (DIC)
Controls. See Driver
Information Center (DIC) on
page 5-27 .
20. Heated and Cooled Front
Seats on page 3-7 (If
Equipped).
21. Dual Automatic Climate Control
System on page 8-1 .

Black plate (15,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
In Brief 1-15
Transmission Range Selection Mode
The Range Selection Mode button
is on the shift lever.
To enable Range Selection:
1. Move the shift lever to
M (Manual Mode). The current
range will appear next to the M.
This is the highest possible
range with all lower gears
accessible. As an example,
when 5 (Fifth) gear is selected,
1 (First) through 5 (Fifth) gears
are available.
2. Press the plus/minus buttons to
select the range of gears for
current driving conditions. See
Manual Mode on page 9-36 . While using Range Selection Mode,
cruise control and the Tow/Haul
mode can be used.
Grade Braking is not available when
Range Selection Mode is active.
See Tow/Haul Mode on page 9-39 .
Four-Wheel Drive If the vehicle has Four-Wheel Drive,
the engine's driving power can be
sent to all four wheels for extra
traction.
Transfer Case Controls The vehicle will have one of two
styles of transfer case controls. Use
these controls to shift into and out of
the different four-wheel drive
modes. Electronic Transfer Case
This transfer case knob is to the left
of the steering column.

Black plate (9,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - CRC - 6/20/14
Keys, Doors, and Windows 2-9
Power Door Locks
Crew/Double Cab Premium Trim
Shown, Other Models Similar
Q : Press to lock the doors.
K : Press to unlock the doors. Delayed Locking If equipped, when locking the doors
with the power lock switch and a
door open, the doors will lock
five seconds after the last door is
closed. Three chimes signal that
delayed locking is in use.
Pressing the power lock switch
twice overrides the delayed locking
feature and immediately locks all
doors.
This feature will not operate if the
key is in the ignition.
Turn delayed locking on or off using
vehicle personalization. See Vehicle
Personalization on page 5-42 .Automatic Door Locks The doors will lock automatically
when all doors are closed, the
ignition is on, and the shift lever is
moved out of P (Park).
To unlock the doors: .
Press
K on a door. .
Shift the transmission into
P (Park).
Lockout Protection When locking is requested with the
driver door open and the key in the
ignition, all the doors will lock and
then the driver door will unlock.
This can be manually overridden by
pressing and holding
Q on the
power door lock switch.
Safety Locks The rear door safety locks prevent
passengers from opening the rear
doors from inside the vehicle.

Black plate (1,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Instruments and Controls 5-1
Instruments and
Controls Controls Steering Wheel Adjustment . . . 5-2
Steering Wheel Controls . . . . . . 5-2
Heated Steering Wheel . . . . . . . 5-3
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Windshield Wiper/Washer . . . . . 5-3
Compass . . . . . . . . . . . . . . . . . . . . . 5-4
Clock . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Power Outlets . . . . . . . . . . . . . . . . . 5-5
Warning Lights, Gauges, and
Indicators Warning Lights, Gauges, and
Indicators . . . . . . . . . . . . . . . . . . . . 5-8
Instrument Cluster . . . . . . . . . . . . 5-9
Speedometer . . . . . . . . . . . . . . . . 5-11
Odometer . . . . . . . . . . . . . . . . . . . . 5-11
Trip Odometer . . . . . . . . . . . . . . . 5-11
Tachometer . . . . . . . . . . . . . . . . . . 5-11
Fuel Gauge . . . . . . . . . . . . . . . . . . 5-12
Engine Oil Pressure
Gauge . . . . . . . . . . . . . . . . . . . . . . 5-12
Engine Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 5-13 Transmission Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 5-14
Voltmeter Gauge . . . . . . . . . . . . . 5-15
Safety Belt Reminders . . . . . . . 5-15
Airbag Readiness Light . . . . . . 5-16
Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . 5-17
Charging System Light . . . . . . 5-18
Malfunction
Indicator Lamp . . . . . . . . . . . . . 5-18
Brake System Warning
Light . . . . . . . . . . . . . . . . . . . . . . . 5-21
Antilock Brake System (ABS)
Warning Light . . . . . . . . . . . . . . 5-21
Four-Wheel-Drive Light . . . . . . 5-22
Tow/Haul Mode Light . . . . . . . . 5-22
Hill Descent Control Light . . . . 5-22
Lane Departure Warning
(LDW) Light . . . . . . . . . . . . . . . . 5-22
Vehicle Ahead Indicator . . . . . . 5-23
Traction Off Light . . . . . . . . . . . . 5-23
StabiliTrak ®
OFF Light . . . . . . . 5-23
Traction Control System
(TCS)/StabiliTrak ®
Light . . . . 5-24
Engine Coolant Temperature
Warning Light . . . . . . . . . . . . . . 5-24
Tire Pressure Light . . . . . . . . . . 5-25
Engine Oil Pressure Light . . . . 5-25
Low Fuel Warning Light . . . . . . 5-25 Security Light . . . . . . . . . . . . . . . . 5-26
High-Beam On Light . . . . . . . . . 5-26
Front Fog Lamp Light . . . . . . . . 5-26
Lamps On Reminder . . . . . . . . . 5-26
Cruise Control Light . . . . . . . . . 5-27
Door Ajar Light . . . . . . . . . . . . . . 5-27
Information Displays Driver Information
Center (DIC) . . . . . . . . . . . . . . . 5-27
Vehicle Messages Vehicle Messages . . . . . . . . . . . 5-31
Battery Voltage and Charging
Messages . . . . . . . . . . . . . . . . . . 5-31
Brake System Messages . . . . 5-32
Compass Messages . . . . . . . . . 5-32
Door Ajar Messages . . . . . . . . . 5-33
Engine Cooling System
Messages . . . . . . . . . . . . . . . . . . 5-33
Engine Oil Messages . . . . . . . . 5-34
Engine Power Messages . . . . 5-34
Fuel System Messages . . . . . . 5-35
Key and Lock Messages . . . . . 5-35
Lamp Messages . . . . . . . . . . . . . 5-35
Object Detection System
Messages . . . . . . . . . . . . . . . . . . 5-35
Ride Control System
Messages . . . . . . . . . . . . . . . . . . 5-36

Black plate (2,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
5-2 Instruments and Controls Airbag System Messages . . . . 5-37
Safety Belt Messages . . . . . . . 5-37
Security Messages . . . . . . . . . . 5-38
Steering System
Messages . . . . . . . . . . . . . . . . . . 5-38
Tire Messages . . . . . . . . . . . . . . . 5-38
Transmission Messages . . . . . 5-39
Vehicle Reminder
Messages . . . . . . . . . . . . . . . . . . 5-41
Vehicle Speed Messages . . . . 5-42
Washer Fluid Messages . . . . . 5-42
Vehicle Personalization Vehicle Personalization . . . . . . 5-42
Universal Remote System Universal Remote System . . . 5-49
Universal Remote System
Programming . . . . . . . . . . . . . . . 5-49
Universal Remote System
Operation . . . . . . . . . . . . . . . . . . 5-52 Controls Steering Wheel
Adjustment
To adjust the tilt and telescoping
steering wheel:
1. Push the lever (1) down to move
the steering wheel forward or
rearward. Lift the lever up to lock
the wheel in place.
2. Pull the lever (2) toward you and
release, to move the steering
wheel up or down. The ignition may need to be set to
the ACC/ACCESSORY or ON/RUN
position to disengage the tilt and
telescoping steering column and
allow easier adjustment.
Do not adjust the steering wheel
while driving.
Steering Wheel Controls The infotainment system can be
operated by using the steering
wheel controls. See "Steering
Wheel Controls" in the infotainment
manual.

Black plate (14,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
5-14 Instruments and Controls
English, Standard Theme Shown
This gauge measures the
temperature of the vehicle's engine
coolant.
While driving under normal
operating conditions, if the needle
moves into the red warning area,
the engine is too hot. Pull off the
road, stop the vehicle, and turn off
the engine as soon as possible. Transmission
Temperature Gauge
Metric, Standard Theme Shown English, Standard Theme Shown
This gauge appears when the
vehicle is in Tow/Haul Mode and
shows the transmission fluid
temperature. If the gauge is reading
in the red area and/or a message
appears in the Driver Information
Center (DIC), the vehicle must be
stopped and the cause checked.
One possible cause is a low fluid
level in the transmission.
See Transmission Messages on
page 5-39 .

Black plate (15,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Instruments and Controls 5-15
{ CautionDo not drive the vehicle while the
transmission fluid is overheating,
or the transmission can be
damaged. This could lead to
costly repairs that would not be
covered by the warranty.
Voltmeter Gauge
Standard Theme Shown
When the ignition is on, this gauge
indicates the battery voltage. When the engine is running, this
gauge shows the condition of the
charging system. The gauge can
transition from a higher to lower or a
lower to higher reading. This is
normal. If the vehicle is operating
outside the normal operating range,
the charging system light comes on.
See Charging System Light on
page 5-18 for more information. The
voltmeter gauge may also read
lower when in fuel economy mode.
This is normal.
Readings outside the normal
operating range can also occur
when a large number of electrical
accessories are operating in the
vehicle and the engine is left idling
for an extended period. This
condition is normal since the
charging system is not able to
provide full power at engine idle. As
engine speeds are increased, this
condition should correct itself as
higher engine speeds allow the
charging system to create maximum
power. The vehicle can only be driven for a
short time with the readings outside
the normal operating range. If the
vehicle must be driven, turn off all
accessories, such as the radio and
air conditioner and unplug all
chargers and accessories.
Readings outside the normal
operating range indicate a possible
problem in the electrical system.
Have the vehicle serviced as soon
as possible.
Safety Belt Reminders Driver Safety Belt Reminder
Light There is a driver safety belt
reminder light on the instrument
cluster.

Black plate (19,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Instruments and Controls 5-19
{ CautionIf the vehicle is continually driven
with this light on, the emission
controls might not work as well,
the vehicle fuel economy might
not be as good, and the engine
might not run as smoothly. This
could lead to costly repairs that
might not be covered by the
vehicle warranty.
{ CautionModifications made to the engine,
transmission, exhaust, intake,
or fuel system of the vehicle or
the replacement of the original
tires with other than those of the
same Tire Performance Criteria
(TPC) can affect the vehicle's
emission controls and can cause
this light to come on.
Modifications to these systems
(Continued) Caution (Continued) could lead to costly repairs not
covered by the vehicle warranty.
This could also result in a failure
to pass a required Emission
Inspection/Maintenance test. See
Accessories and Modifications on
page 10-3 .
This light comes on during a
malfunction in one of two ways:
Light Flashing: A misfire condition
has been detected. A misfire
increases vehicle emissions and
could damage the emission control
system on the vehicle. Diagnosis
and service might be required.
To prevent more serious damage to
the vehicle: .
Reduce vehicle speed. .
Avoid hard accelerations. .
Avoid steep uphill grades. .
If towing a trailer, reduce the
amount of cargo being hauled as
soon as it is possible.
If the light continues to flash, find a
safe place to stop and park the
vehicle. Turn the vehicle off, wait at
least 10 seconds, and restart the
engine. If the light is still flashing,
follow the previous steps and see
your dealer for service as soon as
possible.
Light On Steady: An emission
control system malfunction has
been detected on the vehicle.
Diagnosis and service might be
required.
The following may correct an
emission control system
malfunction: .
Check that the fuel cap is fully
installed. See Filling the Tank on
page 9-66 . The diagnostic
system can determine if the fuel
cap has been left off or
improperly installed. A loose or
missing fuel cap allows fuel to
evaporate into the atmosphere.