2015 GMC SIERRA DENALI sport mode

Black plate (32,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
5-32 Instruments and Controls SERVICE BATTERY
CHARGING SYSTEM On some vehicles, this message
displays if there is a problem with
the battery charging system. Under
certain conditions, the charging
system light may also turn on in the
instrument cluster. See Charging
System Light on page 5-18 . Driving
with this problem could drain the
battery. Turn off all unnecessary
accessories. Have the electrical
system checked as soon as
possible. See your dealer.
TRANSPORT MODE ON This message is displayed when the
vehicle is in transport mode. Some
features can be disabled while in
this mode, including Remote
Keyless Entry (RKE), remote start,
and the vehicle alarm system. Take
the vehicle to your dealer for service
to turn transport mode off. Brake System Messages BRAKE FLUID LOW This message is displayed when the
brake fluid level is low. See Brake
Fluid on page 10-27 .
SERVICE BRAKE ASSIST This message may be displayed
when there is a problem with the
brake boost assist system. When
this message is displayed, the brake
boost assist motor might be heard
operating and you might notice
pulsation in the brake pedal. This is
normal under these conditions. Take
the vehicle to your dealer for
service.
SERVICE TRAILER BRAKE
SYSTEM
On vehicles with the Integrated
Trailer Brake Control (ITBC) system,
this message displays and a chime
may sound when there is a problem
with the ITBC system. When this message displays, power
is no longer available to the trailer
brakes.
As soon as it is safe to do so,
carefully pull your vehicle over to
the side of the road and turn the
ignition off. Check the wiring
connection to the trailer and turn the
ignition back on. If this message still
displays, either your vehicle or the
trailer needs service. See your
dealer.
See “ Integrated Trailer Brake
Control System ” under Towing
Equipment on page 9-78 for more
information.
Compass Messages Dashes may be displayed if the
vehicle temporarily loses
communication with the Global
Positioning System (GPS).

Black plate (9,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
INDEX i-9OnStar ®
Security . . . . . . . . . . . . . . 14-3
OnStar ®
Vehicle
Diagnostics . . . . . . . . . . . . . . . . . . 14-6
Operating Mode
Overheated Engine
Protection . . . . . . . . . . . . . . . . . 10-23
Ordering
Service Publications . . . . . . . . .13-11
Outlets
Power . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Overheated Engine
Protection
Operating Mode . . . . . . . . . . . . . 10-23
Overheating, Engine . . . . . . . . . . 10-21
PPark
Shifting Into . . . . . . . . . . . . . . . . . . . 9-30
Shifting Out of . . . . . . . . . . . . . . . . 9-31
Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . . . 9-47
Brake and P (Park)
Mechanism Check . . . . . . . . 10-34
Over Things That Burn . . . . . . . 9-32 Parking or Backing
Assistance Systems . . . . . . . . . . 9-56
Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . 5-17
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Passenger Sensing System . . . 3-24
Perchlorate Materials
Requirements, California . . . . . 10-3
Personalization
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 5-42
Pickup Conversion to
Chassis Cab . . . . . . . . . . . . . . . . . 9-92
Power
Door Locks . . . . . . . . . . . . . . . . . . . . 2-9
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Outlets . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Protection, Battery . . . . . . . . . . . . . 6-9
Retained Accessory (RAP) . . . 9-29
Seat Adjustment . . . . . . . . . . . . . . . 3-3
Steering Fluid . . . . . . . . . . . . . . . 10-24
Windows . . . . . . . . . . . . . . . . . . . . . 2-19
Pregnancy, Using Safety
Belts . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Privacy
Vehicle Data Recording . . . . . 13-14 Program
Courtesy Transportation . . . . . . 13-8
Proposition 65 Warning,
California . . . . . . . . . . . . . . . . . . . . . 10-2
R Radio Frequency
Identification (RFID) . . . . . . . . . 13-12
Radio Frequency
Statement . . . . . . . . . . . . . . . . . . . 13-12
Reading Lamps . . . . . . . . . . . . . . . . . 6-7
Rear Axle . . . . . . . . . . . . . . . . . . . . . 10-31
Locking . . . . . . . . . . . . . . . . . . . . . . . 9-52
Rear Seats . . . . . . . . . . . . . . . . . . . . . 3-9
Rear Windows . . . . . . . . . . . . . . . . . 2-22
Rearview Mirrors
Automatic Dimming . . . . . . . . . . . 2-19
Reclining Seatbacks . . . . . . . . . . . . 3-4
Recommended Fluids and
Lubricants . . . . . . . . . . . . . . . . . . . 11-12
Records
Maintenance . . . . . . . . . . . . . . . . .11-16
Recreational Vehicle
Towing . . . . . . . . . . . . . . . . . . . . . . 10-91
Reimbursement Program,
GM Mobility . . . . . . . . . . . . . . . . . . 13-5

Black plate (12,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
i-12 INDEX Tires (cont'd)
Changing . . . . . . . . . . . . . . . . . . . 10-76
Designations . . . . . . . . . . . . . . . 10-54
Different Size . . . . . . . . . . . . . . . 10-70
Dual Rotation . . . . . . . . . . . . . . . 10-67
Full-Size Spare . . . . . . . . . . . . . 10-86
If a Tire Goes Flat . . . . . . . . . . 10-74
Inflation Monitor System . . . . 10-62
Inspection . . . . . . . . . . . . . . . . . . 10-65
Low Profile . . . . . . . . . . . . . . . . . 10-51
Messages . . . . . . . . . . . . . . . . . . . . 5-38
Pressure . . . . . . . . . . . . . . . . . . . . 10-60
Pressure Light . . . . . . . . . . . . . . . . 5-25
Pressure Monitor System . . . 10-61
Rotation . . . . . . . . . . . . . . . . . . . . 10-65
Sidewall Labeling . . . . . . . . . . . 10-52
Terminology and
Definitions . . . . . . . . . . . . . . . . . 10-56
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . 10-71
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . 10-72
Wheel Replacement . . . . . . . . 10-73
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . 10-68
Winter . . . . . . . . . . . . . . . . . . . . . . 10-51
Tow/Haul Mode . . . . . . . . . . . . . . . . 9-39 Tow/Haul Mode Light . . . . . . . . . . 5-22
Towing
Driving Characteristics . . . . . . . . 9-68
Equipment . . . . . . . . . . . . . . . . . . . . 9-78
General Information . . . . . . . . . . 9-68
Recreational Vehicle . . . . . . . . 10-91
Trailer . . . . . . . . . . . . . . . . . . . . . . . . 9-71
Trailer Sway Control (TSC) . . . 9-87
Vehicle . . . . . . . . . . . . . . . . . . . . . 10-91
Traction
Control System (TCS)/
StabiliTrak ®
Light . . . . . . . . . . . . 5-24
Off Light . . . . . . . . . . . . . . . . . . . . . . 5-23
Traction Control/Electronic
Stability Control . . . . . . . . . . . . . . 9-49
Trailer
Sway Control (TSC) . . . . . . . . . . 9-87
Tow Mirrors . . . . . . . . . . . . . . . . . . . 2-14
Towing . . . . . . . . . . . . . . . . . . . . . . . . 9-71
Transfer Case . . . . . . . . . . . . . . . . . 9-40
Transmission
Automatic . . . . . . . . . . . . . . . . . . . . . 9-33
Fluid, Automatic . . . . . 10-12, 10-15
Messages . . . . . . . . . . . . . . . . . . . . 5-39
Temperature Gauge . . . . . . . . . . 5-14 Transportation Program,
Courtesy . . . . . . . . . . . . . . . . . . . . . 13-8
Trip Odometer . . . . . . . . . . . . . . . . . 5-11
Truck-Camper Loading
Information . . . . . . . . . . . . . . . . . . . 9-21
Turn and Lane-Change
Signals . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Turn Signal
Bulb Replacement . . . . . . . . . . 10-37
U Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . . . 10-71
Universal Remote System . . . . . 5-49
Operation . . . . . . . . . . . . . . . . . . . . . 5-52
Programming . . . . . . . . . . . . . . . . . 5-49
Using This Manual . . . . . . . . . . . . . . . . iii
V Vehicle
Alarm System . . . . . . . . . . . . . . . . 2-11
Canadian Owners . . . . . . . . . . . . . . . iii
Control . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Identification
Number (VIN) . . . . . . . . . . . . . . . 12-1
Load Limits . . . . . . . . . . . . . . . . . . . 9-15