2018 GMC SIERRA DENALI air conditioning

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
388 Vehicle Care Fuses Usage
19 –
20 –
22 Heating, ventilation,
and air conditioning/
Auxiliary heating,
ventilation, and air
conditioning/Ignition
23 Instrument cluster/
Ignition sensing
diagnostic module/
Ignition
24 –
25 Data link connector/
Driver seat module
26 Passive entry/Passive
start/Heating,
ventilation, and air
conditioning
27 – Fuses Usage
28 –
29 Park enable/
Electrically adjustable
pedals
30 Special equipment
option
31 Accessory/Run/Crank
32 Heated steering wheel
33 –
34 Instrument cluster
36 –
37 –
38 4WD transfer case
electronic control
40 Left doors
41 Driver power seat Fuses Usage
43 Left heated, cooled or
ventilated seats (if
equipped)
44 Right heated, cooled
or ventilated seats (if
equipped)
45 –
Relays Usage
49 Retained accessory
power
50 Run/Crank

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Vehicle Care 395would mean that the tire's
sidewall is 75 percent as high as
it is wide.
(4) Construction Code :
A letter
code is used to indicate the type
of ply construction in the tire.
The letter R means radial ply
construction; the letter D means
diagonal or bias ply
construction; and the letter B
means belted-bias ply
construction.
(5) Rim Diameter :
Diameter of
the wheel in inches.
(6) Load Range :
Load Range.
(7) Service Description :
The
service description indicates the
load index and speed rating of a
tire. If two numbers are given as
in the example, 120/116, then
this represents the load index for
single versus dual wheel usage
(single/dual). The speed rating is
the maximum speed a tire is
certified to carry a load. Tire Terminology and
Definitions Air Pressure :
The amount of
air inside the tire pressing
outward on each square inch of
the tire. Air pressure is
expressed in kPa (kilopascal)
or psi (pounds per square inch).
Accessory Weight :
The
combined weight of optional
accessories. Some examples of
optional accessories are
automatic transmission, power
windows, power seats, and air
conditioning.
Aspect Ratio :
The relationship
of a tire's height to its width.
Belt :
A rubber coated layer of
cords between the plies and the
tread. Cords may be made from
steel or other reinforcing
materials. Bead :
The tire bead contains
steel wires wrapped by steel
cords that hold the tire onto
the rim.
Bias Ply Tire :
A pneumatic tire
in which the plies are laid at
alternate angles less than
90 degrees to the centerline of
the tread.
Cold Tire Pressure :
The
amount of air pressure in a tire,
measured in kPa (kilopascal)
or psi (pounds per square inch)
before a tire has built up heat
from driving. See Tire Pressure
0 397 .
Curb Weight :
The weight of a
motor vehicle with standard and
optional equipment including the
maximum capacity of fuel, oil,
and coolant, but without
passengers and cargo.
DOT Markings :
A code molded
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Technical Data 461
Vehicle Data Capacities and Specifications The following approximate capacities are given in metric and English conversions. See Recommended Fluids and
Lubricants 0 456 .
If the vehicle has a diesel engine, see the Duramax diesel supplement.
Application Capacities
Metric English
Air Conditioning Refrigerant For the air conditioning system refrigerant type and
charge amount, see the refrigerant label under the
hood. See your dealer for more information.
Cooling System
4.3L V6 1500 Series 15.1 L 15.9 qt
5.3L V8 1500 Series (L83) 16.0 L 16.9 qt
6.0L V8 2500 Series and 3500 Series 16.1 L 17.0 qt
6.2L V8 1500 Series 15.7 L 16.6 qt
Engine Oil with Filter
4.3L V6 5.7 L 6.0 qt
5.3L V8; 6.2L V8 7.6 L 8.0 qt
6.0L V8 5.7 L 6.0 qt

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Index 491
Index A Accessories and
Modifications . . . . . . . . . . . . . . . . . . 343
Accessory Power . . . . . . . . . . . . . . . 260
Active Fuel Management . . . . . . . 264
Add-On Electrical Equipment . . . 336
Adding a Snow Plow or
Similar Equipment . . . . . . . . . . . . . 337
Additional Information
OnStar . . . . . . . . . . . . . . . . . . . . . . . 485
Additional Maintenance
and Care . . . . . . . . . . . . . . . . . . . . . . 453
Adjustable Throttle and
Brake Pedal . . . . . . . . . . . . . . . . . . . 256
Adjustments
Lumbar, Front Seats . . . . . . . . . . . . 60
Agreements
Trademarks and License . . . . . 218
Air Cleaner/Filter, Engine . . . . . . . 358
Air Conditioning . . . . . .224, 226, 228
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . 232
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 231
Airbag System
Check . . . . . . . . . . . . . . . . . . . . . . . . . . 91
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . . . 82
Passenger Sensing System . . . . 86 Airbag System (cont'd)
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 82
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . . 82
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 80
Where Are the Airbags? . . . . . . . . 78
Airbags
Adding Equipment to the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . 90
Light On-Off . . . . . . . . . . . . . . . . . . 147
On-Off Light . . . . . . . . . . . . . . . . . . 147
On-Off Switch . . . . . . . . . . . . . . . . . . 84
Passenger Status Indicator . . . 149
Readiness Light . . . . . . . . . . . . . . 147
Servicing Airbag-Equipped
Vehicles . . . . . . . . . . . . . . . . . . . . . . . 90
System Check . . . . . . . . . . . . . . . . . . 77
Alarm
Vehicle Security . . . . . . . . . . . . . . . . 44
All-Season Tires . . . . . . . . . . . . . . . . 389
All-Terrain Tires . . . . . . . . . . . . . . . . . 391
AM-FM Radio . . . . . . . . . . . . . . . . . . . 190
Antenna
Fixed Mast . . . . . . . . . . . . . . . . . . . 194
Multi-band . . . . . . . . . . . . . . . . . . . . 194
Antilock Brake System (ABS) . . . 280

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Index 493California (cont'd)
Perchlorate Materials
Requirements . . . . . . . . . . . . . . . 343
California
Proposition
65 Warning . . . . . . . . . .343, 369, 426,
Back Cover
Canadian Vehicle Owners . . . . . . . . 2
Capacities and
Specifications . . . . . . . . . . . . . . . . . 461
Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . 264
Tailgate . . . . . . . . . . . . . . . . . . . . . . . . . 43
Winter Driving . . . . . . . . . . . . . . . . 245
Cargo
Tie-Downs . . . . . . . . . . . . . . . . . . . . 126
Cargo Lamp . . . . . . . . . . . . . . . . . . . . 183
Caution, Danger, and Warning . . . . 3
CD Player . . . . . . . . . . . . . . . . . . . . . . 195
Center Console Storage . . . . . . . . 125
Center High-Mounted
Stoplamp (CHMSL) and
Cargo Lamp . . . . . . . . . . . . . . . . . . . 380
Center Seat . . . . . . . . . . . . . . . . . . . . . 59
Chains, Tire . . . . . . . . . . . . . . . . . . . . 413
Charging
Wireless . . . . . . . . . . . . . . . . . . . . . . 134
Charging System Light . . . . . . . . . 149 Check
Engine Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . 150
Ignition Transmission Lock . . . 374
Child Restraints
Infants and Young Children . . . . . 94
Lower Anchors and Tethers
for Children . . . . . . . . . . . . . . . . . . . 99
Older Children . . . . . . . . . . . . . . . . . . 92
Securing . . . . . . . . . . . . . 111, 114, 115
Systems . . . . . . . . . . . . . . . . . . . . . . . . 96
Circuit Breakers . . . . . . . . . . . . . . . . 381
Cleaning
Exterior Care . . . . . . . . . . . . . . . . . 435
Interior Care . . . . . . . . . . . . . . . . . . 441
Climate Control
Systems . . . . . . . . . . . . . . . . . 224, 226
Air Conditioning . . . . . . . . . 224, 226
Dual Automatic . . . . . . . . . . . . . . . 228
Heating . . . . . . . . . . . . . . . . . . 224, 226
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Cluster, Instrument . . . . . . . . . . . . . 138
Collision Damage Repair . . . . . . . 472
Compartments
Storage . . . . . . . . . . . . . . . . . . . . . . . 124
Compass . . . . . . . . . . . . . . . . . . . . . . . 131
Connections
OnStar . . . . . . . . . . . . . . . . . . . . . . . 482 Control
Hill Descent . . . . . . . . . . . . . . . . . . 284
Traction and Electronic
Stability . . . . . . . . . . . . . . . . . . . . . 282
Control Light
Hill Descent . . . . . . . . . . . . . . . . . . 153
Control of a Vehicle . . . . . . . . . . . . . 236
Convex Mirrors . . . . . . . . . . . . . . . . . . 47
Coolant
Engine Temperature Gauge . . 144
Engine Temperature
Warning Light . . . . . . . . . . . . . . . 155
Cooling . . . . . . . . . . . . . . .224, 226, 228
Cooling System . . . . . . . . . . . . . . . . . 359
Courtesy Transportation
Program . . . . . . . . . . . . . . . . . . . . . . . 471
Cruise Control . . . . . . . . . . . . . . . . . . 285
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Cupholders . . . . . . . . . . . . . . . . . . . . . 124
Customer Assistance . . . . . . . . . . . 468
Offices . . . . . . . . . . . . . . . . . . . . . . . . 467
Text Telephone (TTY)
Users . . . . . . . . . . . . . . . . . . . . . . . 468
Customer Information
Service Publications
Ordering Information . . . . . . . . 474
Customer Satisfaction
Procedure . . . . . . . . . . . . . . . . . . . . . 465