battery GMC YUKON XL 2015 Owner's Guide

Black plate (1,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
Vehicle Care 10-1
Vehicle Care
General Information
General Information . . . . . . . . . . 10-2
California Proposition65 Warning . . . . . . . . . . . . . . . . . 10-2
California Perchlorate Materials Requirements . . . . 10-3
Accessories and Modifications . . . . . . . . . . . . . . . 10-3
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 10-3
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . 10-5
Engine Oil . . . . . . . . . . . . . . . . . . . 10-6
Engine Oil Life System . . . . . . 10-9
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 10-10
Engine Air Cleaner/Filter . . . . 10-13
Cooling System . . . . . . . . . . . . 10-14
Engine Coolant . . . . . . . . . . . . . 10-15
Engine Overheating . . . . . . . . 10-18
Engine Fan . . . . . . . . . . . . . . . . . 10-19
Washer Fluid . . . . . . . . . . . . . . . 10-20
Brakes . . . . . . . . . . . . . . . . . . . . . 10-20 Brake Fluid . . . . . . . . . . . . . . . . . 10-21
Battery . . . . . . . . . . . . . . . . . . . . . 10-23
Four-Wheel Drive . . . . . . . . . . . 10-24
Front Axle . . . . . . . . . . . . . . . . . . 10-24
Rear Axle . . . . . . . . . . . . . . . . . . 10-25
Noise Control System . . . . . . 10-26
Starter Switch Check . . . . . . . 10-27
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . 10-27
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . 10-27
Park Brake and P (Park) Mechanism Check . . . . . . . . 10-28
Wiper Blade Replacement . . . . . . . . . . . . . . 10-28
Glass Replacement . . . . . . . . 10-29
Windshield Replacement . . . 10-29
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-29
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-30
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . 10-30
LED Lighting . . . . . . . . . . . . . . . 10-30
Headlamps . . . . . . . . . . . . . . . . . 10-30
Front Turn Signal Lamps . . . 10-30 Taillamps, Turn Signal,
Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . 10-31
License Plate Lamp . . . . . . . . 10-32
Replacement Bulbs . . . . . . . . . 10-33
Electrical System
Electrical System Overload . . . . . . . . . . . . . . . . . . 10-33
Fuses . . . . . . . . . . . . . . . . . . . . . . 10-33
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-34
Instrument Panel Fuse Block (Left) . . . . . . . . . . . . . . . 10-38
Instrument Panel Fuse Block (Right) . . . . . . . . . . . . . . . . . . . . 10-40
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . 10-43
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-44
All-Season Tires . . . . . . . . . . . . 10-45
Winter Tires . . . . . . . . . . . . . . . . 10-45
Low-Profile Tires . . . . . . . . . . . 10-46
All-Terrain Tires . . . . . . . . . . . . 10-46
Tire Sidewall Labeling . . . . . . 10-46
Tire Designations . . . . . . . . . . . 10-48
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . 10-49

Black plate (6,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
10-6 Vehicle Care
1. Positive (+) Terminal. SeeJump
Starting on page 10-78.
2. Battery on page 10-23.
3. Coolant Surge Tank and Pressure Cap. See Cooling
System on page 10-14.
4. Engine Air Cleaner/Filter on
page 10-13.
5. Automatic Transmission Dipstick. See “How to Check
Automatic Transmission Fluid”
under Automatic Transmission
Fluid on page 10-10.
6. Remote Negative (–) Location (Out of View). See Jump Starting
on page 10-78.
7. Engine Cooling Fans (Out of View). See Cooling System on
page 10-14.
8. Engine Oil Fill Cap. See “When
to Add Engine Oil” underEngine
Oil on page 10-6.
9. Engine Oil Dipstick. See “Checking Engine Oil” under
Engine Oil on page 10-6. 10. Windshield Washer Fluid
Reservoir. See “Adding Washer
Fluid” under Washer Fluid on
page 10-20.
11. Brake Fluid Reservoir. See Brake Fluid on page 10-21.
12. Engine Compartment Fuse
Block on page 10-34.
Engine Oil
To ensure proper engine
performance and long life, careful
attention must be paid to engine oil.
Following these simple, but
important steps will help protect
your investment:
.Always use engine oil approved
to the proper specification and of
the proper viscosity grade. See
“Selecting the Right Engine Oil”
in this section.
.Check the engine oil level
regularly and maintain the
proper oil level. See “Checking
Engine Oil” and“When to Add
Engine Oil” in this section.
.Change the engine oil at the
appropriate time. See Engine Oil
Life System on page 10-9.
.Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.
Checking Engine Oil
If equipped, the ENGINE OIL LOW
ADD OIL message displays when
the engine oil level may be too low.
SeeEngine Oil Messages on
page 5-34. Check the oil level
before filling to the recommended
level. If the oil is not low and this
message remains on, see your
dealer.
It is also a good idea to check the
engine oil level at each fuel fill. In
order to get an accurate reading,
the vehicle must be on level ground.
The engine oil dipstick handle is a
loop. See Engine Compartment
Overview on page 10-5 for the
location of the engine oil dipstick.

Black plate (23,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
Vehicle Care 10-23
{Caution
.Using the wrong fluid can
badly damage brake
hydraulic system parts. For
example, just a few drops of
mineral-based oil, such as
engine oil, in the brake
hydraulic system can damage
brake hydraulic system parts
so badly that they will have to
be replaced. Do not let
someone put in the wrong
kind of fluid.
.If brake fluid is spilled on the
vehicle's painted surfaces,
the paint finish can be
damaged. Be careful not to
spill brake fluid on the
vehicle. If you do, wash it off
immediately.
Battery
The original equipment battery is
maintenance free. Do not remove
the cap and do not add fluid.
Refer to the replacement number on
the original battery label when a
new battery is needed. SeeEngine
Compartment Overview on
page 10-5 for battery location.
{Warning
Battery posts, terminals, and
related accessories contain lead
and lead compounds, chemicals
known to the State of California to
cause cancer and reproductive
harm. Wash hands after handling.
Vehicle Storage
{Warning
Batteries have acid that can burn
you and gas that can explode.
You can be badly hurt if you are
not careful. See Jump Starting on
page 10-78 for tips on working
around a battery without
getting hurt.
Infrequent Usage: Remove the
black, negative (−) cable from the
battery to keep the battery from
running down.
Extended Storage: Remove the
black, negative (−) cable from the
battery or use a battery trickle
charger.

Black plate (36,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
10-36 Vehicle Care
ItemUsage
1 Electric Running Boards
2 Antilock Brake System Pump
3 Interior BEC LT1
4 MBS Passenger
5 Suspension Leveling
Compressor
6 4WD Transfer Case Electronic
Control
10 Electric Parking Brake
13 Interior BEC LT2
14 Rear BEC 1
17 MBS Driver
21 ALC Exhaust Solenoid
23 Integrated Chassis Control Module Item
Usage
24 Real Time Dampening
25 Fuel Pump Power Module
26 Spare/Battery Regulated Voltage
Control
28 Upfitter 2
29 Upfitter 2 Relay
30 Wiper
31 TIM
34 Back-up Lamps
35 Antilock Brake System Valve
36 Trailer Brakes
37 Upfitter 3 Relay
39 Trailer Stop/Turn Right
40 Trailer Stop/ Turn Left Item
Usage
41 Trailer Park Lamps
42 Right Parking Lamps
43 Left Parking Lamps
44 Upfitter 3
45 Automatic Level Control Run/Crank
47 Upfitter 4
48 Upfitter 4 Relay
49 Reverse Lamps
51 Parking Lamp Relay
59 Euro Trailer
60 Air Conditioning Control
63 Upfitter 1
67 Trailer Battery
69 RC Upfitter 3 and 4
70 VBAT Upfitter 3 and 4

Black plate (39,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
Vehicle Care 10-39
Number Usage2 Not Used
3 Not Used
4 Accessory Power Outlet 1
5 Retained Accessory Power/Accessory
6 APO/BATT
7 Universal Garage Door Opener/Inside
Rear View Mirror
8 SEO Retained Accessory Power
9 Not Used
10 Body Control Module 3
11 Body Control Module 5
12 Steering Wheel Controls Backlighting
13 Not Used
14 Not Used Number Usage
15 Not Used
16 Discrete Logic Ignition Sensor
17 VPM
18 Mirror Window Module
19 Body Control Module 1
20 Front Bolster (if equipped)
21 Not Used
22 Not Used
23 Not Used
24 Heater, Ventilation and Air Conditioning
Ignition/Heater,
Ventilation and Air
Conditioning Auxiliary
25 Instrument Cluster Ignition/Sensing
Diagnostic Module
Ignition Number Usage
26 Tilt Column/SEO, Tilt Column Lock 1/SEO
27 Data Link Connector/ Driver Seat Module
28 Passive Entry/Passive Start/Heater,
Ventilation and Air
Conditioning Battery
29 Content Theft
30 Not Used
31 Not Used
32 Not Used
33 SEO/Automatic Level Control
34 Park Enable Electric Adjustable Pedal (if
equipped)
35 Not Used
36 Miscellaneous R/C
37 Heated Steering Wheel

Black plate (40,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
10-40 Vehicle Care
Number Usage38 Steering Column Lock 2 (if equipped)
39 Instrument Cluster Battery
40 Not Used
41 Not Used
42 Euro Trailer (if equipped)
43 Left Doors
44 Driver Power Seat
45 Not Used
46 Right Heated/ Cooled Seat
47 Left Heated/ Cooled Seat
48 Not Used
49 Not Used
50 Accessory Power Outlet 2
51 Not Used Number Usage
52 Retained Accessory Power/Accessory
Relay
53 Run/Crank Relay
54 Not Used
55 Not Used
56 Not Used
Instrument Panel Fuse
Block (Right)
The right instrument panel fuse
block access door is on the
passenger side edge of the
instrument panel.
Pull off the cover to access the fuse
block.

Black plate (78,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
10-78 Vehicle Care
Jump Starting
For more information about the
vehicle battery, seeBattery on
page 10-23.
If the vehicle's battery (or batteries)
has run down, you may want to use
another vehicle and some jumper
cables to start your vehicle. Be sure
to use the following steps to do it
safely.
{Warning
Batteries can hurt you. They can
be dangerous because:
.They contain acid that can
burn you.
.They contain gas that can
explode or ignite.
.They contain enough
electricity to burn you.
If you do not follow these steps
exactly, some or all of these
things can hurt you.
{Caution
Ignoring these steps could result
in costly damage to the vehicle
that would not be covered by the
vehicle warranty. Trying to start
the vehicle by pushing or pulling it
will not work, and it could damage
the vehicle.
1. Check the other vehicle. It must have a 12-volt battery with a
negative ground system.
{Caution
If the other vehicle does not have
a 12-volt system with a negative
ground, both vehicles can be
damaged. Only use a vehicle that
has a 12-volt system with a
negative ground for jump starting.
2. If the vehicle is equipped with dual batteries, using the battery
that is closer to the starter will reduce electrical resistance. This
is located on the passenger
side, in the rear of the engine
compartment.
3. Get the vehicles close enough so the jumper cables can reach,
but be sure the vehicles are not
touching each other. If they are,
it could cause an unwanted
ground connection. You would
not be able to start your vehicle,
and the bad grounding could
damage the electrical systems.
To avoid the possibility of the
vehicles rolling, set the parking
brake firmly on both vehicles
involved in the jump start
procedure. Put the automatic
transmission in P (Park) or a
manual transmission in Neutral
before setting the parking brake.
For vehicles with
four-wheel-drive with a
N (Neutral) transfer case
position, be sure the transfer
case is in a drive gear —not
N (Neutral).

Black plate (79,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
Vehicle Care 10-79
{Caution
If any accessories are left on or
plugged in during the jump
starting procedure, they could be
damaged. The repairs would not
be covered by the vehicle
warranty. Whenever possible, turn
off or unplug all accessories on
either vehicle when jump starting.
4. Turn off the ignition on both vehicles. Unplug unnecessary
accessories plugged into the
accessory power outlets. Turn
off the radio and all the lamps
that are not needed. This will
avoid sparks and help save both
batteries. And it could save the
radio! 5. Open the hood on the other
vehicle and locate the
positive (+) and negative (−)
terminal locations on that
vehicle.
The positive (+) terminal is under
a red plastic cover at the positive
battery post. To uncover the
positive (+) terminal, open the
red plastic cover.
For more information on the
location of the remote
positive (+) and remote negative
(−) terminals, see Engine
Compartment Overview on
page 10-5.
{Warning
An electric fan can start up even
when the engine is not running
and can injure you. Keep hands,
clothing and tools away from any
underhood electric fan.
{Warning
Using a match near a battery can
cause battery gas to explode.
People have been hurt doing this,
and some have been blinded.
Use a flashlight if you need more
light.
Battery fluid contains acid that
can burn you. Do not get it on
you. If you accidentally get it in
your eyes or on your skin, flush
the place with water and get
medical help immediately.
{Warning
Fans or other moving engine
parts can injure you badly. Keep
your hands away from moving
parts once the engine is running.

Black plate (80,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
10-80 Vehicle Care
6. Check that the jumper cables donot have loose or missing
insulation. If they do, you could
get a shock. The vehicles could
be damaged too.
Before you connect the cables,
here are some basic things you
should know. Positive (+) will go
to positive (+) or to a remote
positive (+) terminal if the
vehicle has one. Negative (−)
will go to a heavy, unpainted
metal engine part or to a remote
negative (−) terminal if the
vehicle has one.
Do not connect positive (+) to
negative (−) or you will get a
short that would damage the
battery and maybe other parts
too. And do not connect the
negative (−) cable to the
negative (−) terminal on the
dead battery because this can
cause sparks.
7. Connect the red positive (+)
cable to the positive (+) terminal
of the vehicle with the dead
battery.
8. Do not let the other end touch metal. Connect it to the
positive (+) terminal of the good
battery. Use a remote
positive (+) terminal if the
vehicle has one. 9. Connect the black negative (−)
cable to the negative (−) terminal
of the good battery. Use a
remote negative (−) terminal if
the vehicle has one.
Do not let the other end touch
anything until the next step.
10. Connect the other end of the
negative (−) cable to the metal
bracket that is bolted to the
engine and supports the
resonator, on the vehicle with
the dead battery.

Black plate (81,1)GMC 2015i Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431503) - 2015 - crc - 8/11/14
Vehicle Care 10-81
11. Start the vehicle with the goodbattery and run the engine for a
while.
12. Try to start the vehicle that had the dead battery. If it will not
start after a few tries, it
probably needs service.
{Caution
If the jumper cables are
connected or removed in the
wrong order, electrical shorting
may occur and damage the
vehicle. The repairs would not be
covered by the vehicle warranty.
Always connect and remove the
jumper cables in the correct order,
making sure that the cables do
not touch each other or other
metal.
Jumper Cable Removal
Reverse the sequence exactly when
removing the jumper cables.
Towing the Vehicle
{Caution
Incorrectly towing a disabled
vehicle may cause damage. The
damage would not be covered by
the vehicle warranty.
Have the vehicle towed on a flatbed
car carrier. A wheel lift tow truck
could damage the vehicle.
Consult your dealer or a
professional towing service if the
disabled vehicle must be towed.
Recreational Vehicle
Towing
Recreational vehicle towing means
towing the vehicle behind another
vehicle, such as a motor home. The
two most common types of
recreational vehicle towing are
dinghy and dolly towing. Dinghy
towing is towing the vehicle with all
four wheels on the ground. Dolly towing is towing the vehicle with two
wheels on the ground and two
wheels on a dolly.
Follow the tow vehicle
manufacturer
’s instructions. See
your dealer or trailering professional
for additional advice and equipment
recommendations.
{Caution
Use of a shield mounted in front
of the vehicle grille could restrict
airflow and cause damage to the
transmission. The repairs would
not be covered by the vehicle
warranty. If using a shield, only
use one that attaches to the
towing vehicle.