2016 GMC YUKON engine overheat

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Vehicle Care 289
Caution
This vehicle has a specific
coolant fill procedure. Failure to
follow this procedure could cause
the engine to overheat and be
severely damaged.
{Warning
Steam and scalding liquids from a
hot cooling system can blow out
and burn you badly. Never turn
the cap when the cooling system,
including the surge tank pressure
cap, is hot. Wait for the cooling
system and surge tank pressure
cap to cool.
If no coolant is visible in the surge
tank, add coolant.
1. Remove the coolant surge tank pressure cap when the cooling
system, including the coolant
surge tank pressure cap and
upper radiator hose, is no
longer hot.
Turn the pressure cap slowly
counterclockwise about one full
turn. If a hiss is heard, wait for
that to stop. A hiss means
there is still some pressure left.
2. Keep turning the pressure cap slowly, and remove it.
3. Fill the coolant surge tank with the proper mixture to the FULL
COLD mark.
4. With the coolant surge tank pressure cap off, start the
engine and let it run until the
engine coolant temperature
gauge indicates approximately
90 °C (195 °F).
By this time, the coolant level
inside the coolant surge tank
may be lower. If the level is
lower, add more of the proper mixture to the coolant surge
tank until the level reaches the
FULL COLD mark.
5. Replace the pressure cap tightly.
6. Verify coolant level after the engine is shut off and the
coolant is cold. If necessary,
repeat coolant fill procedure
Steps 1-6.
Caution
If the pressure cap is not tightly
installed, coolant loss and
possible engine damage may
occur. Be sure the cap is properly
and tightly secured.
Engine Overheating
Caution
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
290 Vehicle Care
The vehicle has several indicators
to warn of engine overheating.
There is a coolant temperature
gauge in the vehicle's instrument
cluster. SeeEngine Coolant
Temperature Gauge 0138.
In addition, there are ENGINE
OVERHEATED STOP ENGINE,
ENGINE OVERHEATED IDLE
ENGINE, and ENGINE POWER IS
REDUCED messages in the Driver
Information Center (DIC). See
Engine Cooling System Messages
0 154 andEngine Power
Messages 0155.
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
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 0262.
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.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Vehicle Care 291
If the temperature overheat gauge is
no longer in the overheat zone or an
overheat warning no longer
displays, the vehicle can be driven.
Continue to drive the vehicle slowly
for about 10 minutes. Keep a safe
vehicle distance from the vehicle in
front. If the warning does not come
back on, continue to drive normally
and have the cooling system
checked for proper fill and function.
If the warning continues, pull over,
stop, and park the vehicle
right away.
If there is still no sign of steam and
the vehicle is equipped with an
engine driven cooling fan, push
down the accelerator until the
engine speed is about twice as fast
as normal idle speed for at least
five minutes while the vehicle is
parked. If the warning is still there,
turn off the engine and get everyone
out of the vehicle until it cools down.
If there is no sign of steam, idle the
engine for five minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down.Engine Fan
If the vehicle has electric cooling
fans, the fans may be heard
spinning at low speed during most
everyday driving. The fans may turn
off if no cooling is required. Under
heavy vehicle loading, trailer towing,
high outside temperatures,
or operation of the air conditioning
system, the fans may change to
high speed and an increase in fan
noise may be heard. This is normal
and indicates that the cooling
system is functioning properly. The
fans will change to low speed when
additional cooling is no longer
required.
The electric engine cooling fans
may run after the engine has been
turned. off. This is normal and no
service is required.
Washer Fluid
What to Use
When windshield washer fluid needs
to be added, be sure to read the
manufacturer's instructions before
use. Use a fluid that has sufficientprotection against freezing in an
area where the temperature may fall
below freezing.
Adding Washer Fluid
The vehicle has a low washer fluid
message on the DIC that comes on
when the washer fluid is low. The
message is displayed for
15 seconds at the start of each
ignition cycle. When the WASHER
FLUID LOW ADD FLUID message
displays, washer fluid will need to
be added to the windshield washer
fluid reservoir.
Open the cap with the washer
symbol on it. Add washer fluid until
the tank is full. See
Engine
Compartment Overview 0278 for
reservoir location.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Index 407
Driving (cont'd)Hill and Mountain Roads . . . . . . 202
If the Vehicle is Stuck . . . . . . . . . 204
Loss of Control . . . . . . . . . . . . . . . 196
Off-Road . . . . . . . . . . . . . . . . . . . . . 196
Off-Road Recovery . . . . . . . . . . . 195
Vehicle Load Limits . . . . . . . . . . . 205
Wet Roads . . . . . . . . . . . . . . . . . . . 201
Winter . . . . . . . . . . . . . . . . . . . . . . . . 202
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 184
E
E85 or FlexFuel . . . . . . . . . . . . . . . . 257
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 273
Electrical System Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 305
Fuses . . . . . . . . . . . . . . . . . . . . . . . . 304
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . 308, 311
Overload . . . . . . . . . . . . . . . . . . . . . 304
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 313
Emergency OnStar
®. . . . . . . . . . . . . . . . . . . . . . 395
Engine
Air Cleaner/Filter . . . . . . . . . . . . . 285 Engine (cont'd)
Check and Service Engine
Soon Light . . . . . . . . . . . . . . . . . . 142
Compartment Overview . . . . . . . 278
Coolant . . . . . . . . . . . . . . . . . . . . . . . 287
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 138
Cooling System . . . . . . . . . . . . . . . 286
Cooling System Messages . . . 154
Drive Belt Routing . . . . . . . . . . . . 379
Exhaust . . . . . . . . . . . . . . . . . . . . . . 219
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Heater . . . . . . . . . . . . . . . . . . . . . . . . 215
Oil Life System . . . . . . . . . . . . . . . 281
Oil Messages . . . . . . . . . . . . . . . . . 155
Oil Pressure Gauge . . . . . . . . . . 137
Overheating . . . . . . . . . . . . . . . . . . 289
Power Messages . . . . . . . . . . . . . 155
Running While Parked . . . . . . . . 220
Starting . . . . . . . . . . . . . . . . . . . . . . . 213
Entry Lighting . . . . . . . . . . . . . . . . . . . 181
Equipment, Towing . . . . . . . . . . . . . 266
Event Data Recorders . . . . . . . . . . 392
Exit Lighting . . . . . . . . . . . . . . . . . . . . 181
Extender, Safety Belt . . . . . . . . . . . . 85
Exterior Lamp Controls . . . . . . . . . 174
Exterior Lamps Off Reminder . . . 176
F
Fan Engine . . . . . . . . . . . . . . . . . . . . . . . . 291
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter, Engine Air Cleaner . . . . . . . . . . . 285
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 176
Flashers, Hazard Warning . . . . . . 178
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 334 Changing . . . . . . . . . . . . . . . . . . . . . 335
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 361
Fluid
Automatic Transmission . . . . . . 282
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 293
Four-Wheel DriveTransfer Case . . . . . . . . . . . . . . . 225
Washer . . . . . . . . . . . . . . . . . . . . . . . 291
Fog Lamps Bulb Replacement . . . . . . . . . . . . 179
Folding Mirrors . . . . . . . . . . . . . . . . . . 54
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . 248
Four-Wheel Drive . . . . . . . . . . 225, 294
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . 390

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Index 411
O
Object Detection SystemMessages . . . . . . . . . . . . . . . . . . . . . 157
Odometer . . . . . . . . . . . . . . . . . . . . . . . 136 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Off-Road . . . . . . . . . . . . . . . . . . . . . . . 196 Driving . . . . . . . . . . . . . . . . . . . . . . . . 196
Recovery . . . . . . . . . . . . . . . . . . . . . 195
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . 279
Engine Oil Life System . . . . . . . 281
Engine Oil Pressure Gauge . . . 137
Messages . . . . . . . . . . . . . . . . . . . . 155
Older Children, Restraints . . . . . . . 98
Online Owner Center . . . . . . . . . . . 383
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . 392
OnStar
®Additional
Information . . . . . . . . . . . . . . . . . . . . 398
OnStar
®Connections . . . . . . . . . . . 396
OnStar®Diagnostics . . . . . . . . . . . . 398
OnStar®Emergency . . . . . . . . . . . . 395
OnStar®Navigation . . . . . . . . . . . . . 395
OnStar®Overview . . . . . . . . . . . . . . 394
OnStar®Security . . . . . . . . . . . . . . . 395
Ordering Service Publications . . . . . . . . . . 389
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . 129 Overheating, Engine . . . . . . . . . . . . 289
P
Park
Shifting Into . . . . . . . . . . . . . . . . . . . 217
Shifting Out of . . . . . . . . . . . . . . . . 218
Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . . . 231
Brake and P (Park)Mechanism Check . . . . . . . . . . 298
Over Things That Burn . . . . . . . 218
Parking or Backing
Assistance Systems . . . . . . . . . . 245
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . 141
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Passenger Sensing System . . . . . 92
Perchlorate Materials Requirements, California . . . . . . 275
Personalization
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 164
Power Door Locks . . . . . . . . . . . . . . . . . . . . . 42
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Outlets . . . . . . . . . . . . . . . . . . . . . . . 129
Protection, Battery . . . . . . . . . . . . 182
Retained Accessory (RAP) . . . 216
Seat Adjustment . . . . . . . . . . . . . . . . 63 Power (cont'd)
Windows . . . . . . . . . . . . . . . . . . . . . . . 57
Power Assist Steps . . . . . . . . . . . . . . 48
Pregnancy, Using Safety Belts . . . 83
Privacy Vehicle Data Recording . . . . . . . 391
Program Courtesy Transportation . . . . . . 386
Proposition
65 Warning,
California . . . . . . . . . . . .275, 294, 345
R
Radio Frequency Statement . . . . 390
Reading Lamps . . . . . . . . . . . . . . . . . 180
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 296Locking . . . . . . . . . . . . . . . . . . . . . . . 235
Rear Climate Control System . . . 188
Rear Seats Heated . . . . . . . . . . . . . . . . . . . . . . . . . 68
Rear Storage . . . . . . . . . . . . . . . . . . . 120
Rear Window Washer/Wiper . . . . 127
Rearview Mirrors . . . . . . . . . . . . . . . . 56 Automatic Dimming . . . . . . . . . . . . . 56
Reclining Seatbacks . . . . . . . . . . . . . 64
Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . . . 373
Records
Maintenance . . . . . . . . . . . . . . . . . . 376