oil level GMC YUKON 2012 User Guide

Black plate (15,1)GMC Yukon/Yukon XL Owner Manual - 2012
Vehicle Care 10-15
Consistency of Readings
Always check the fluid level at least
twice using the procedure described
previously. Consistency (repeatable
readings) is important to maintaining
proper fluid level. If readings are still
inconsistent, contact the dealer.
Engine Air Cleaner/Filter
SeeEngine Compartment Overview
on page 10‑6 for the location of the
engine air cleaner/filter.
Inspect the air cleaner/filter at the
scheduled maintenance intervals
and replace it at the first oil change
after each 80 000 km (50,000 mi)
interval. See Maintenance Schedule
on page 11‑3 for more information.
If driving on dusty/dirty conditions,
inspect the filter at each engine oil
change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/filter,
remove the engine air cleaner/filter
from the vehicle by following
Steps 1 through 6. When the engine
air cleaner/filter is removed, lightly
shake it to release loose dust and
dirt. If the engine air cleaner/filter
remains covered with dirt, a new
filter is required. Never use
compressed air to clean the filter.
Replacing the Engine Air
Cleaner/Filter
1. Locate the air cleaner/filter
assembly. See Engine
Compartment Overview on
page 10‑6.
2. Loosen the four screws on the cover of the housing and lift up
the cover.

Black plate (19,1)GMC Yukon/Yukon XL Owner Manual - 2012
Vehicle Care 10-19
Checking Coolant
The vehicle must be on a level
surface when checking the coolant
level.
Check to see if coolant is visible in
the coolant surge tank. If the coolant
inside the coolant surge tank is
boiling, do not do anything else until
it cools down. If coolant is visible
but the coolant level is not at or
above the FULL COLD mark, add a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant at the
coolant surge tank, but be sure the
cooling system is cool before this
is done.
The coolant surge tank is located in
the engine compartment on the
passenger side of the vehicle. See
Engine Compartment Overview on
page 10‑6for more information on
location.
The coolant level should be at or
above the FULL COLD mark. If it is
not, the vehicle may have a leak in
the cooling system.
How to Add Coolant to the
Surge Tank
{WARNING
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engine.
Notice: This vehicle has a
specific coolant fill procedure.
Failure to follow this procedure
could cause the engine to
overheat and be severely
damaged.
{WARNING
An electric engine cooling fan
under the hood can start up even
when the engine is not running
and can cause injury. Keep
hands, clothing, and tools away
from any underhood electric fan.

Black plate (28,1)GMC Yukon/Yukon XL Owner Manual - 2012
10-28 Vehicle Care
After work is done on the brake
hydraulic system, make sure the
level is above the MIN but not over
the MAX mark.
What to Add
Use only new DOT 3 brake fluid
from a sealed container. See
Recommended Fluids and
Lubricants on page 11‑11.
Always clean the brake fluid
reservoir cap and the area around
the cap before removing it. This
helps keep dirt from entering the
reservoir.
{WARNING
With the wrong kind of fluid in the
brake hydraulic system, the
brakes might not work well. This
could cause a crash. Always use
the proper brake fluid.Notice
.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
If the vehicle is a hybrid, see the
hybrid supplement for more
information.
Refer to the replacement number on
the original battery label when a
new battery is needed. See
Engine
Compartment Overview on
page 10‑6 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.

Black plate (43,1)GMC Yukon/Yukon XL Owner Manual - 2012
Vehicle Care 10-43
The vehicle may not be equipped
with all of the fuses, relays, and
features shown.Fuses Usage
1 Right Trailer
Stop/Turn Lamp
2 Electronic Stability
Suspension Control,
Automatic Level
Control Exhaust
3 Left Trailer
Stop/Turn Lamp
4 Engine Controls
5 Engine Control
Module, Throttle
Control
6 Trailer Brake
Controller
7 Front Washer
8 Oxygen Sensors
9 Antilock Brakes
System 2 Fuses
Usage
10 Trailer Back-up
Lamps
11 Driver Side
Low-Beam Headlamp
12 Engine Control
Module (Battery)
13 Fuel Injectors, Ignition
Coils (Right Side)
14 Transmission Control
Module (Battery)
15 Vehicle Back-up
Lamps
16 Passenger Side
Low-Beam Headlamp
17 Air Conditioning
Compressor
18 Oxygen Sensors
19 Transmission Controls
(Ignition)
20 Fuel Pump Fuses
Usage
21 Fuel System Control
Module
22 Headlamp Washer
23 Rear Windshield
Washer
24 Fuel Injectors, Ignition
Coils (Left Side)
25 Trailer Parking Lamps
26 Driver Side Parking
Lamps
27 Passenger Side
Parking Lamps
28 Fog Lamps
29 Horn
30 Passenger Side
High-Beam Headlamp
31 Daytime Running
Lamps (DRL)
(If Equipped)
32 Driver Side
High-Beam Headlamp

Black plate (3,1)GMC Yukon/Yukon XL Owner Manual - 2012
Service and Maintenance 11-3
Maintenance
Schedule
Owner Checks and Services
At Each Fuel Stop
.Check the engine oil level. See
Engine Oil on page 10‑8.
Once a Month
.Check the tire inflation
pressures. See Tire Pressure on
page 10‑56.
.Inspect the tires for wear. See
Tire Inspection on page 10‑62.
.Check the windshield washer
fluid level. See Washer Fluid on
page 10‑25.
Engine Oil Change
When the CHANGE ENGINE OIL
SOON message displays, have the
engine oil and filter changed within
the next 1 000 km/600 mi. If driven
under the best conditions, the
engine oil life system might not
indicate the need for vehicle service
for more than a year. The engine oil
and filter must be changed at least
once a year and the oil life system
must be reset. Your trained dealer
technician can perform this work.
If the engine oil life system is reset
accidentally, service the vehicle
within 5 000 km/3,000 mi since the
last service. Reset the oil life
system when the oil is changed.
See Engine Oil Life System on
page 10‑10.
Tire Rotation and Required
Services Every
12 000 km/7,500 mi
Rotate the tires, if recommended
for the vehicle, and perform the
following services. See Tire
Rotation on page 10‑62.
.Check engine oil level and oil
life percentage. If needed,
change engine oil and filter, and
reset oil life system. See Engine
Oil on page 10‑8 andEngine Oil
Life System on page 10‑10.
.Check engine coolant level. See
Engine Coolant on page 10‑17.
.Check windshield washer fluid
level. See Washer Fluid on
page 10‑25.

Black plate (9,1)GMC Yukon/Yukon XL Owner Manual - 2012
Service and Maintenance 11-9
.To avoid break‐down or failure to
start the vehicle, maintain a
battery with full cranking power.
.Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion‐free.
Belts
.Belts may need replacing if they
squeak or show signs of
cracking or splitting.
.Trained dealer technicians can
inspect the belts and
recommend replacement when
necessary.
Brakes
Brakes stop the vehicle and are
crucial to safe driving.
.Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping.
.Trained dealer technicians have
access to tools and equipment
to inspect the brakes and
recommend quality parts
engineered for the vehicle.
Fluids
Proper fluid levels and approved
fluids protect the vehicle’s systems
and components. See
Recommended Fluids and
Lubricants on page 11‑11 for GM
approved fluids.
.Engine oil and windshield
washer fluid levels should be
checked at every fuel fill.
.Instrument cluster lights may
come on to indicate that fluids
may be low and need to be
filled.
Hoses
Hoses transport fluids and should
be regularly inspected to ensure
that there are no cracks or leaks.
With a multi‐point inspection, your
dealer can inspect the hoses and
advise if replacement is needed. Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage.
The brake lamps need to be
checked periodically to ensure
that they light when braking.
.With a multi‐point inspection,
your dealer can check the lamps
and note any concerns.
Shocks and Struts
Shocks and struts help aid in control
for a smoother ride.
.Signs of wear may include
steering wheel vibration, bounce/
sway while braking, longer
stopping distance, or uneven
tire wear.

Black plate (4,1)GMC Yukon/Yukon XL Owner Manual - 2012
14-4 OnStar
Connections
OnStar Hands-Free Calling allows
calls to be made and received from
the vehicle. The vehicle can also be
controlled from a cell phone through
the OnStar mobile app. See
www.onstar.com for coverage maps.
Hands-Free Calling
1. PushX. System responds:
“OnStar ready.”
2. Say “Dial.”System responds:
“Please say the name or number
to call.”
3. Say the entire number without pausing, including a “1”and the
area code. System responds:
“OK calling.”
Retrieve My Number
1. PushX. System responds:
“OnStar ready.”
2. Say “My Number.” System
responds: “Your OnStar
Hands-Free Calling number is.”
End a Call
PushX. System responds: “Call
ended.”
Store a Name Tag for Speed
Dialing
1. PushX. System responds:
“OnStar ready.”
2. Say “Store.” System responds:
“Please say the number you
would like to store.”
3. Say the entire number without pausing. System responds:
“Please say the name tag.”
4. Pick a name tag. “System
responds: ”About to store tag>. Does that sound OK?”
5. Say “Yes”or“No” to try again.
System responds: “OK, storing
.”
Place a Call Using a Stored
Number
1. PushX. System responds:
“OnStar ready.”
2. Say “Call .” System
responds: “OK, calling
.”
Verify Minutes and Expiration
PushXand say “minutes” then
“verify” to check how many minutes
remain and their expiration date.
OnStar Mobile App
With an iPhone®or
Android™-based mobile device, an
OnStar mobile app can be
downloaded. The vehicle can be
remote started, if equipped, or the
doors can be unlocked from
anywhere there is cell phone
service. It can also check the fuel
level, tire pressure, and oil life.
It can connect to an OnStar Advisor
anytime. For OnStar mobile app
compatibility or further information,
see www.onstar.com.

Black plate (7,1)GMC Yukon/Yukon XL Owner Manual - 2012
INDEX i-7
Lamps (cont'd)License Plate . . . . . . . . . . . . . . . 10-38
Malfunction Indicator . . . . . . . . . 5-21
Reading . . . . . . . . . . . . . . . . . . . . . . . 6-9
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . 3-28
Lap-Shoulder Belt . . . . . . . . . . . . . 3-22
LATCH System Replacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . 3-60
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . 3-53
Level Control Automatic . . . . . . . . . . . . . . . . . . . . . 9-50
Liftgate
Carbon Monoxide . . . . . . . . 2-9, 2-10
Light StabiliTrak
®OFF . . . . . . . . . . . . . 5-25
Lighting
Entry . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Illumination Control . . . . . . . . . . . . 6-8 Lights
Airbag Readiness . . . . . . . . . . . . . 5-18
Antilock Brake System
(ABS) Warning . . . . . . . . . . . . . . 5-24
Brake System Warning . . . . . . . 5-23
Charging System . . . . . . . . . . . . . 5-20
Cruise Control . . . . . . . . . . . . . . . . 5-28
Engine Oil Pressure . . . . . . . . . . 5-27
Flash-to-Pass . . . . . . . . . . . . . . . . . . 6-3
Front Fog Lamp . . . . . . . . . . . . . . 5-28
High-Beam On . . . . . . . . . . . . . . . . 5-28
High/Low Beam Changer . . . . . . 6-3
Low Fuel Warning . . . . . . . . . . . . 5-27
Safety Belt Reminders . . . . . . . . 5-17
Security . . . . . . . . . . . . . . . . . . . . . . 5-27
Tire Pressure . . . . . . . . . . . . . . . . . 5-26
Tow/Haul Mode . . . . . . . . . . . . . . . 5-25
Traction Control System (TCS)/StabiliTrak
®. . . . . . . . . . 5-26
Locking Rear Axle . . . . . . . . . . . . . 9-49
Locks Automatic Door . . . . . . . . . . . . . . . . 2-8
Delayed Locking . . . . . . . . . . . . . . . 2-8
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Locks (cont'd)
Lockout Protection . . . . . . . . . . . . . 2-8
Power Door . . . . . . . . . . . . . . . . . . . . 2-8
Safety . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Loss of Control . . . . . . . . . . . . . . . . . 9-5
Low Fuel Warning Light . . . . . . . . 5-27
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . 3-53
Lumbar Adjustment . . . . . . . . . . . . . 3-4 Front Seats . . . . . . . . . . . . . . . . . . . . 3-4
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . .11-14
Maintenance Schedule
Recommended Fluidsand Lubricants . . . . . . . . . . . . . 11-11
Transfer Case . . . . . . . . . . 9-37, 9-42
Malfunction Indicator Lamp . . . . 5-21
Manual Mirrors . . . . . . . . . . . . . . . . 2-17
Manual Mode . . . . . . . . . . . . . . . . . . 9-35
Memory Features . . . . . . . . . . . . . . . 1-9
Memory Seats . . . . . . . . . . . . . . . . . . 3-7