2017 GMC YUKON heater

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 11/9/16
224 Driving and Operating
at or below−18 °C (0 °F). Vehicles
with an engine heater should be
plugged in at least four hours before
starting. There may be an internal
thermostat in the plug end of the
cord, which will prevent engine
heater operation at temperatures
above −18 °C (0 °F).
To Use the Engine Heater
1. Turn off the engine.
2. Open the hood and unwrap the
electrical cord. The cord is by
the left front fender, next to the
engine compartment fuse
block.
Check the heater cord for
damage. If it is damaged, do
not use it. See your dealer for
a replacement. Inspect the
cord for damage yearly.
3. Plug the cord into a normal, grounded 110-volt AC outlet.
{Warning
Improper use of the heater cord
or an extension cord can damage
the cord and may result in
overheating and fire.
. Plug the cord into a
three-prong electrical utility
receptacle that is protected
by a ground fault detection
function. An ungrounded
outlet could cause an
electric shock.
. Use a weatherproof,
heavy-duty, 15 amp-rated
extension cord if needed.
Failure to use the
recommended extension
cord in good operating
condition, or using a
damaged heater or
extension cord, could make
(Continued)
Warning (Continued)
it overheat and cause a fire,
property damage, electric
shock, and injury.
. Do not operate the vehicle
with the heater cord
permanently attached to the
vehicle. Possible heater
cord and thermostat
damage could occur.
. While in use, do not let the
heater cord touch vehicle
parts or sharp edges. Never
close the hood on the
heater cord.
. Before starting the vehicle,
unplug the cord, reattach
the cover to the plug, and
securely fasten the cord.
Keep the cord away from
any moving parts.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 11/9/16
Driving and Operating 225
4. Before starting the engine, besure to unplug and store the
cord as it was before to keep it
away from moving engine
parts. If you do not, it could be
damaged.
The length of time the heater should
remain plugged in depends on
several factors. Ask a dealer in the
area where you will be parking the
vehicle for the best advice on this.
Retained Accessory
Power (RAP)
The following vehicle accessories
can be used for up to 10 minutes
after the engine is turned off:
. Audio System.
. Power Windows.
. OnStar System (if equipped).
. Sunroof (if equipped).
. Accessory Power Outlets. The
console and center seat outlets
are Retained Accessory Power
(RAP) powered. These features work with the
ignition on. Once the ignition is
turned off, the windows and sunroof
continue to work up to 10 minutes or
until any door is opened. The radio
continues to work for up to
10 minutes or until the driver door is
opened.
Shifting Into Park
{Warning
It can be dangerous to get out of
the vehicle if the shift lever is not
fully in P (Park) with the parking
brake firmly set. The vehicle can
roll. If you have left the engine
running, the vehicle can move
suddenly. You or others could be
injured. To be sure the vehicle will
not move, even when you are on
fairly level ground, use the steps
that follow. If the vehicle has a
four-wheel-drive transfer case
with a N (Neutral) position, and
the transfer case is in N (Neutral),
the vehicle will be free to roll,
(Continued)
Warning (Continued)
even if the shift lever is in
P (Park). Be sure the transfer
case is in a drive gear. If towing a
trailer, seeDriving Characteristics
and Towing Tips 0269.
1. Hold the brake pedal down, then set the parking brake.
See Parking Brake 0239.
2. Move the shift lever into the P (Park) position by pulling the
shift lever toward you and
moving it up as far as it will go.
3. Be sure the transfer case is in a drive gear —not in
N (Neutral).
4. Turn the ignition to LOCK/OFF.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 11/9/16
Vehicle Care 299
{Warning
Operating the engine with the air
cleaner/filter off can cause you or
others to be burned. The air
cleaner not only cleans the air; it
helps to stop flames if the engine
backfires. Use caution when
working on the engine and do not
drive with the air cleaner/filter off.
Caution
If the air cleaner/filter is off, dirt
can easily get into the engine,
which could damage it. Always
have the air cleaner/filter in place
when driving.
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
1. Coolant Surge Tank
2. Coolant Surge TankPressure Cap
3. Engine Electric Cooling Fan(s)
{Warning
An electric engine cooling fan can
start even when the engine is not
running. To avoid injury, always
keep hands, clothing, and tools
away from any engine
cooling fan.
{Warning
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you do,
you can be burned.
Do not run the engine if there is a
leak. If you run the engine, it
could lose all coolant. That could
cause an engine fire, and you
could be burned. Get any leak
fixed before you drive the vehicle.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 11/9/16
300 Vehicle Care
Caution
Using coolant other than
DEX-COOL®can cause
premature engine, heater core,
or radiator corrosion. In addition,
the engine coolant could require
changing sooner. Any repairs
would not be covered by the
vehicle warranty. Always use
DEX-COOL (silicate-free) coolant
in the vehicle.
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL®engine
coolant. This coolant is designed to
remain in the vehicle for 5 years or
240 000 km (150,000 mi), whichever
occurs first.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
see Engine Overheating 0302.
What to Use
{Warning
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
The coolant warning system is set
for the proper coolant mixture.
With plain water or the wrong
mixture, the engine could get too
hot but you would not get the
overheat warning. The engine
could catch fire and you or others
could be burned. Use a 50/
50 mixture of clean, drinkable
water and DEX-COOL coolant.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
. Gives freezing protection down
to−37 °C (−34 °F), outside
temperature. .
Gives boiling protection up to
129 °C (265 °F), engine
temperature.
. Protects against rust and
corrosion.
. Will not damage aluminum parts.
. Helps keep the proper engine
temperature.
Caution
If improper coolant mixture,
inhibitors, or additives are used in
the vehicle cooling system, the
engine could overheat and be
damaged. Too much water in the
mixture can freeze and crack
engine cooling parts. The repairs
would not be covered by the
vehicle warranty. Use only the
proper mixture of engine coolant
for the cooling system. See
Recommended Fluids and
Lubricants 0386.
Never dispose of engine coolant by
putting it in the trash, or by pouring
it on the ground, or into sewers,

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 11/9/16
Vehicle Care 303
REDUCED messages in the Driver
Information Center (DIC).
SeeEngine Cooling System
Messages 0162 andEngine Power
Messages 0163.
If the decision is made not to lift the
hood when this warning appears,
get service help right away.
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface.
Check to see if the engine cooling
fan(s) are running. If the engine is
overheating, the fans should be
running. If they are not, do not
continue to run the engine, and
have the vehicle serviced.
If Steam is Coming from the
Engine Compartment
{Warning
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Just turn it (Continued)
Warning (Continued)
off and get everyone away from
the vehicle until it cools down.
Wait until there is no sign of
steam or coolant before you open
the hood.
If you keep driving when the
engine is overheated, the liquids
in it can catch fire. You or others
could be badly burned. Stop the
engine if it overheats, and get out
of the vehicle until the engine
is cool.
If No Steam is Coming from
the Engine Compartment
The ENGINE OVERHEATED STOP
ENGINE or the ENGINE
OVERHEATED IDLE ENGINE
message, along with a low coolant
condition, can indicate a serious
problem. If there is an engine overheat
warning, but no steam is seen or
heard, the problem may not be too
serious. Sometimes the engine can
get a little too hot when the vehicle:
.
Climbs a long hill on a hot day.
. Stops after high-speed driving.
. Idles for long periods in traffic.
. Tows a trailer; see Trailer Towing
0 272.
If the ENGINE OVERHEATED
STOP ENGINE or the ENGINE
OVERHEATED IDLE ENGINE
message appears with no sign of
steam, try this for a minute or so: 1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and to the
highest fan speed. Open the
windows as necessary.
3. When it is safe to do so, pull off the road, shift to P (Park) or
N (Neutral), and let the
engine idle.
If the engine coolant temperature
gauge is no longer in the overheat
zone or an overheat warning no

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 11/9/16
320 Vehicle Care
ItemUsage
54 –
55 –
56 –
57 –
58 –
59 Euro trailer
60 A/C control
61 –
62 –
63 Upfitter 1
64 –
65 –
66 –
67 Trailer battery
68 –
69 RC upfitter 3 and 4
70 VBAT upfitter 3 and 4
71 –
72 Upfitter 1 relay Item
Usage
73 –
74 Engine control module ignition
75 Miscellaneous ignition spare
76 Transmission ignition
77 RC upfitter 1 and 2
78 VBAT upfitter 1 and 2
79 –
80 –
81 –
82 –
83 Euro trailer/RC
84 Run/Crank relay
85 –
86 –
87 Engine
88 Injector A –odd
89 Injector B –even Item
Usage
90 O2 sensor B
91 Throttle control
92 Engine control module relay
93 Horn
94 Fog lamps
95 High-beam headlamps
96 –
97 –
98 –
99 –
100 O2 sensor A
101 Engine control module
102 Engine control module/
Transmission
control module
103 Auxiliary interior heater
104 Starter

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 11/9/16
420 Index
Drive Belt Routing, Engine . . . . . . 392
Driver Assistance Systems . . . . . 253
Driver InformationCenter (DIC) . . . . . . . . . . . . . . . . . . 153
Driving Assistance Systems . . . . . . . . . . 256
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . 269
Defensive . . . . . . . . . . . . . . . . . . . . . 202
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 202
For Better Fuel Economy . . . . . . . 26
Hill and Mountain Roads . . . . . . 210
If the Vehicle is Stuck . . . . . . . . . 212
Loss of Control . . . . . . . . . . . . . . . 204
Off-Road . . . . . . . . . . . . . . . . . . . . . 204
Off-Road Recovery . . . . . . . . . . . 203
Vehicle Load Limits . . . . . . . . . . . 213
Wet Roads . . . . . . . . . . . . . . . . . . . 209
Winter . . . . . . . . . . . . . . . . . . . . . . . . 210
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 192
E
E85 or FlexFuel . . . . . . . . . . . . . . . . 266
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 283
Electrical System Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 317 Electrical System (cont'd)
Fuses . . . . . . . . . . . . . . . . . . . . . . . . 317
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 321, 324
Overload . . . . . . . . . . . . . . . . . . . . . 316
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 326
Emergency OnStar
®. . . . . . . . . . . . . . . . . . . . . . 408
Engine Air Cleaner/Filter . . . . . . . . . . . . . 298
Check and Service EngineSoon Light . . . . . . . . . . . . . . . . . . 145
Compartment Overview . . . . . . . 288
Coolant . . . . . . . . . . . . . . . . . . . . . . . 300
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 140
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . 150
Cooling System . . . . . . . . . . . . . . . 299
Cooling System Messages . . . 162
Drive Belt Routing . . . . . . . . . . . . 392
Exhaust . . . . . . . . . . . . . . . . . . . . . . 228
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
Heater . . . . . . . . . . . . . . . . . . . . . . . . 223
Oil Life System . . . . . . . . . . . . . . . 293
Oil Messages . . . . . . . . . . . . . . . . . 163
Oil Pressure Gauge . . . . . . . . . . 139 Engine (cont'd)
Oil Pressure Light . . . . . . . . . . . . 151
Overheating . . . . . . . . . . . . . . . . . . 302
Power Messages . . . . . . . . . . . . . 163
Running While Parked . . . . . . . . 228
Starting . . . . . . . . . . . . . . . . . . . . . . . 222
Entry Lighting . . . . . . . . . . . . . . . . . . . 189
Equipment, Towing . . . . . . . . . . . . . 275
Event Data Recorders . . . . . . . . . . 405
Exit Lighting . . . . . . . . . . . . . . . . . . . . 189
Extended Parking . . . . . . . . . . . . . . . 227
Extender, Safety Belt . . . . . . . . . . . . 85
Exterior Lamp Controls . . . . . . . . . 182
Exterior Lamps Off Reminder . . . 184
F
Fan Engine . . . . . . . . . . . . . . . . . . . . . . . . 304
Features
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter, Engine Air Cleaner . . . . . . . . . . . 298
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 184
Flashers, Hazard Warning . . . . . . 186
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 347 Changing . . . . . . . . . . . . . . . . . . . . . 348
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 374

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 11/9/16
422 Index
HeatedRear Seats . . . . . . . . . . . . . . . . . . . . . 71
Steering Wheel . . . . . . . . . . . . . . . 126
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Heated Mirrors . . . . . . . . . . . . . . . . . . . 55
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . 223
Heating . . . . . . . . . . . . . . . . . . . . 192, 196
High-Beam On Light . . . . . . . . . . . . 152
High-Speed Operation . . . . . . . . . . 335
Hill and Mountain Roads . . . . . . . . 210
Hill Start Assist (HSA) . . . . . . . . . . 240
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
How to Wear Safety Belts Properly . . . . . . . . . . . . . . . . . . . . . . . . 79
HVAC . . . . . . . . . . . . . . . . . . . . . . 192, 196
I
Ignition Positions . . . . . . . . . . 218, 220
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . . . 311
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 52
Indicator Vehicle Ahead . . . . . . . . . . . . . . . . 148
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . 101
Infotainment . . . . . . . . . . . . . . . . . . . . 191 Infotainment System . . . . . . . . . . . . 406
Instrument Cluster . . . . . . . . . . . . . . 135
Instrument Panel
Storage Area . . . . . . . . . . . . . . . . . 121
Interior Rearview Mirrors . . . . . . . . . 57
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 358
K
Key and Lock Messages . . . . . . . . 164
Keyless EntryRemote (RKE) System . . . . . 32, 34
Keys . . . . . . . . . . . . . . . . . . . . . . . . . 28, 31
L
Labeling, Tire Sidewall . . . . . . . . . . 329
Lamps Daytime Running (DRL) . . . . . . 185
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 188
Exterior Controls . . . . . . . . . . . . . . 182
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . 184
License Plate . . . . . . . . . . . . . . . . . 315
Malfunction Indicator . . . . . . . . . 145
Messages . . . . . . . . . . . . . . . . . . . . 164
On Reminder . . . . . . . . . . . . . . . . . 152 Lamps (cont'd)
Reading . . . . . . . . . . . . . . . . . . . . . . 188
Lane Change Alert (LCA) . . . . . . . 261
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . 263
Lane Keep Assist (LKA) . . . . . . . . 263
Lane Keep Assist Light . . . . . . . . . 148
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . . . 85
Lap-Shoulder Belt . . . . . . . . . . . . . . . 80
LATCH System Replacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . .114
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . 106
LED Lighting . . . . . . . . . . . . . . . . . . . . 314
Level Control Automatic . . . . . . . . . . . . . . . . . . . . . 243
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Lighting
Entry . . . . . . . . . . . . . . . . . . . . . . . . . 189
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Illumination Control . . . . . . . . . . . 187
LED . . . . . . . . . . . . . . . . . . . . . . . . . . 314
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 Airbag Readiness . . . . . . . . . . . . . 143
Antilock Brake System(ABS) Warning . . . . . . . . . . . . . . 147
Brake System Warning . . . . . . . 147