2014 GMC YUKON engine overheat

Black plate (19,1)GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada-
6081505) - 2014 - crc - 4/23/13
Vehicle Care 10-19
Warning (Continued)
SeeOverheated Engine
Protection Operating Mode on
page 10-19 for information on
driving to a safe place in an
emergency.
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 an engine overheat warning is
displayed but no steam can be 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 on page 9-63.
If the overheat warning is displayed
with no sign of steam:
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. In heavy traffic, let the engine idle in N (Neutral) while stopped.
If it is safe to do so, pull off the
road, shift to P (Park) or
N (Neutral) and let the
engine idle.
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. If the warning continues, pull over,
stop, and park the vehicle
right away.
If there is no sign of steam, idle the
engine for three minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down. Also, see
“Overheated
Engine Protection Operating Mode”
later in this section.
Overheated Engine
Protection
Operating Mode
If an overheated engine condition
exists and the ENGINE POWER IS
REDUCED message is displayed,
an overheat protection mode which
alternates firing groups of cylinders
helps prevent engine damage. In
this mode, a loss in power and
engine performance will be noticed.
This operating mode allows the
vehicle to be driven to a safe place
in an emergency. Driving extended

Black plate (20,1)GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada-
6081505) - 2014 - crc - 4/23/13
10-20 Vehicle Care
distances and/or towing a trailer in
the overheat protection mode
should be avoided.
Notice:After driving in the
overheated engine protection
operating mode, to avoid engine
damage, allow the engine to cool
before attempting any repair. The
engine oil will be severely
degraded. Repair the cause of
coolant loss, change the oil and
reset the oil life system. See
Engine Oil on page 10-6.
Engine Fan
The vehicle electric cooling 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.
Power Steering Fluid
See
Engine Compartment Overview
on page 10-5 for reservoir location.
When to Check Power Steering
Fluid
It is not necessary to regularly
check power steering fluid unless
there is a leak suspected in the
system or an unusual noise is
heard. A fluid loss in this system
could indicate a problem. Have the
system inspected and repaired.
How to Check Power Steering
Fluid
To check the power steering fluid:
1. Turn the key off and let the
engine compartment cool down.
2. Wipe the cap and the top of the reservoir clean.
3. Unscrew the cap and wipe the dipstick with a clean rag.
4. Replace the cap and completely tighten it.
5. Remove the cap again and look at the fluid level on the dipstick.
The level should be at the FULL
COLD mark. If necessary, add only
enough fluid to bring the level up to
the mark.
What to Use
To determine what kind of fluid to
use, see Recommended Fluids and
Lubricants on page 11-12. Always
use the proper fluid.

Black plate (32,1)GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada-
6081505) - 2014 - crc - 4/23/13
10-32 Vehicle Care
Headlamp Wiring
An electrical overload may cause
the lamps to go on and off, or in
some cases to remain off. Have the
headlamp wiring checked right away
if the lamps go on and off or
remain off.
Windshield Wipers
If the wiper motor overheats due to
heavy snow or ice, the windshield
wipers will stop until the motor cools
and will then restart.
Although the circuit is protected
from electrical overload, overload
due to heavy snow or ice may
cause wiper linkage damage.
Always clear ice and heavy snow
from the windshield before using the
windshield wipers.
If the overload is caused by an
electrical problem and not snow or
ice, be sure to get it fixed.
Fuses and Circuit
Breakers
The wiring circuits in the vehicle are
protected from short circuits by a
combination of fuses, circuit
breakers, and fusible thermal links.
This greatly reduces the chance of
fires caused by electrical problems.
Look at the silver-colored band
inside the fuse. If the band is broken
or melted, replace the fuse. Be sure
you replace a bad fuse with a new
one of the identical size and rating.
Fuses of the same amperage can
be temporarily borrowed from
another fuse location, if a fuse goes
out. Replace the fuse as soon as
you can.
Engine Compartment
Fuse Block
The Engine Compartment Fuse
Block is located in the engine
compartment, on the driver side of
the vehicle. Lift the cover for access
to the fuse/relay block.
Notice:Spilling liquid on any
electrical component on the
vehicle may damage it. Always
keep the covers on any electrical
component.
To remove fuses, hold the end of
the fuse between your thumb and
index finger and pull straight out.

Black plate (4,1)GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada-
6081505) - 2014 - crc - 4/23/13
i-4 INDEX
Dual Automatic ClimateControl System . . . . . . . . . . . . . . . . 8-4
DVD Rear Seat EntertainmentSystem . . . . . . . . . . . . . . . . . . . . . . 7-36
DVD/CD Player . . . . . . . . . . . . . . . . 7-21
E
E85 or FlexFuel . . . . . . . . . . . . . . . 9-57
Electrical Equipment, Add-On . . . . . . . . . . . . . . . . . . . . . . 9-77
Electrical System Engine Compartment
Fuse Block . . . . . . . . . . . . . . . . 10-32
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . 10-32
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . 10-36
Overload . . . . . . . . . . . . . . . . . . . 10-31
Emergency OnStar
®. . . . . . . . . . . . . . . . . . . . . . 14-2
Engine Air Cleaner/Filter . . . . . . . . . . . 10-13
Check and Service Engine
Soon Light . . . . . . . . . . . . . . . . . . 5-19
Compartment Overview . . . . . . . 10-5 Engine (cont'd)
Coolant . . . . . . . . . . . . . . . . . . . . . 10-15
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 5-14
Cooling System . . . . . . . . . . . . . 10-14
Cooling System Messages . . . 5-36
Drive Belt Routing . . . . . . . . . . . . 12-4
Exhaust . . . . . . . . . . . . . . . . . . . . . . 9-27
Fan . . . . . . . . . . . . . . . . . . . . . . . . . 10-20
Heater . . . . . . . . . . . . . . . . . . . . . . . . 9-23
Oil Life System . . . . . . . . . . . . . . . 10-9
Oil Messages . . . . . . . . . . . . . . . . . 5-37
Oil Pressure Gauge . . . . . . . . . . 5-13
Overheated Protection Operating Mode . . . . . . . . . . . 10-19
Overheating . . . . . . . . . . . . . . . . 10-18
Power Messages . . . . . . . . . . . . . 5-37
Pressure Light . . . . . . . . . . . . . . . . 5-24
Running While Parked . . . . . . . . 9-28
Starting . . . . . . . . . . . . . . . . . . . . . . . 9-22
Entry Lighting . . . . . . . . . . . . . . . . . . . 6-8
Equipment, Towing . . . . . . . . . . . . 9-67
Event Data Recorders . . . . . . . . 13-14
Exit Lighting . . . . . . . . . . . . . . . . . . . . 6-8
Extender, Safety Belt . . . . . . . . . . 3-25
Exterior Lamp Controls . . . . . . . . . 6-1
Exterior Lamps Off Reminder . . . 6-2
F
Fan Engine . . . . . . . . . . . . . . . . . . . . . . 10-20
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Filter, Engine Air Cleaner . . . . . . . . . 10-13
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 6-2
Flashers, Hazard Warning . . . . . . 6-5
Flat Tire . . . . . . . . . . . . . . . . . . . . . . 10-61 Changing . . . . . . . . . . . . . . . . . . . 10-63
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-57
Floor Mats . . . . . . . . . . . . . . . . . . . . 10-92
Fluid Automatic Transmission . . . . 10-10
Brakes . . . . . . . . . . . . . . . . . . . . . . 10-22
Four-Wheel
Drive
Transfer Case . . . 9-33, 9-37
Power Steering . . . . . . . . . . . . . 10-20
Washer . . . . . . . . . . . . . . . . . . . . . 10-21
Fog Lamps Bulb Replacement . . . . . . . . . . . . . 6-6
Folding Mirrors . . . . . . . . . . . . . . . . 2-17

Black plate (8,1)GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada-
6081505) - 2014 - crc - 4/23/13
i-8 INDEX
N
NavigationOnStar®. . . . . . . . . . . . . . . . . . . . . . 14-2
Vehicle Data Recording and Privacy . . . . . . . . . . . . . . . 13-15
New Vehicle Break-In . . . . . . . . . . 9-19
O
Object Detection System Messages . . . . . . . . . . . . . . . . . . . . 5-38
Object Detection, Side Blind Zone Alert (SBZA) . . . . . . . . . . . 9-49
Odometer . . . . . . . . . . . . . . . . . . . . . . 5-12
Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Off-Road . . . . . . . . . . . . . . . . . . . . . . . 9-5 Driving . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Recovery . . . . . . . . . . . . . . . . . . . . . . 9-4
Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . 10-6
Engine Oil Life System . . . . . . . 10-9
Engine Oil PressureGauge . . . . . . . . . . . . . . . . . . . . . . 5-13
Messages . . . . . . . . . . . . . . . . . . . . 5-37
Pressure Light . . . . . . . . . . . . . . . . 5-24
Older Children, Restraints . . . . . 3-40
Online Owner Center . . . . . . . . . . 13-4 OnStar
®
System, In Brief . . . . . . . . . . . . . . 1-28
OnStar®Additional
Information . . . . . . . . . . . . . . . . . . . 14-5
OnStar
®Connections . . . . . . . . . . 14-3
OnStar®Diagnostics . . . . . . . . . . . 14-5
OnStar®Emergency . . . . . . . . . . . 14-2
OnStar®Navigation . . . . . . . . . . . . 14-2
OnStar®Overview . . . . . . . . . . . . . 14-1
OnStar®Security . . . . . . . . . . . . . . 14-2
Operation, Infotainment
System . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Ordering Service Publications . . . . . . . . .13-11
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Overheated Engine Protection
Operating Mode . . . . . . . . . . . . . 10-19
Overheating, Engine . . . . . . . . . . 10-18
Overview, Infotainment System . . . . . . . . . . . . . . . . . . . . 7-3, 7-5
P
ParkShifting Into . . . . . . . . . . . . . . . . . . . 9-24
Shifting Out of . . . . . . . . . . . . . . . . 9-26
Tilt Mirrors . . . . . . . . . . . . . . . . . . . . 2-18
Parking Assist, Ultrasonic . . . . . . . . . . . . . 9-48
Brake . . . . . . . . . . . . . . . . . . . . . . . . . 9-40
Brake and P (Park)
Mechanism Check . . . . . . . . 10-28
Over Things That Burn . . . . . . . 9-26
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . 5-17
Passenger Sensing System . . . 3-33
Perchlorate Materials Requirements, California . . . . . 10-3
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 5-44
Phone Bluetooth . . . . . . . . . . . . . . . . . . . . . 7-48
Power Door Locks . . . . . . . . . . . . . . . . . . . . 2-7
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Outlets . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Protection, Battery . . . . . . . . . . . . . 6-9
Retained Accessory (RAP) . . . 9-24