check engine light GMC YUKON XL 2016 User Guide

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Driving and Operating 233
intended path. Trailer Sway Control
(TSC) is also on automatically when
the vehicle is started. SeeTrailer
Sway Control (TSC) 0272.
If cruise control is being used and
traction control or StabiliTrak begins
to limit wheel spin, cruise control will
disengage. Cruise control may be
turned back on when road
conditions allow.
Both systems come on
automatically when the vehicle is
started and begins to move. The
systems may be heard or felt while
they are operating or while
performing diagnostic checks. This
is normal and does not mean there
is a problem with the vehicle.
It is recommended to leave both
systems on for normal driving
conditions, but it may be necessary
to turn TCS off if the vehicle gets
stuck in sand, mud, ice, or snow.
See If the Vehicle Is Stuck 0204
and “Turning the Systems Off and
On” later in this section.
When the transfer case is in
Four-Wheel Drive Low, the stability
system is automatically disabled, the StabiliTrak OFF light comes on,
and the appropriate message will
appear on the DIC. Both traction
control and StabiliTrak are
automatically disabled in this
condition.
The indicator light for both systems
is in the instrument cluster. This
light will:
.
Flash when TCS is limiting
wheel spin.
. Flash when StabiliTrak is
activated.
. Turn on and stay on when either
system is not working.
If either system fails to turn on or to
activate, a message displays in the
Driver Information Center (DIC),
and
dcomes on and stays on to
indicate that the system is inactive
and is not assisting the driver in maintaining control. The vehicle is
safe to drive, but driving should be
adjusted accordingly.
If
dcomes on and stays on:
1. Stop the vehicle.
2. Turn the engine off and wait 15 seconds.
3. Start the engine.
Drive the vehicle. If
dcomes on
and stays on, the vehicle may need
more time to diagnose the problem.
If the condition persists, see your
dealer.
Turning the Systems Off
and On
The button for TCS and StabiliTrak
is on the instrument panel to the left
of the steering wheel.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
256 Driving and Operating
Use regular unleaded gasoline
meeting ASTM specification D4814
with a posted octane rating of 87 or
higher. Do not use gasoline with an
octane rating below 87, as it may
cause engine damage and will lower
fuel economy.
Use of Seasonal Fuels
Use summer and winter fuels in the
appropriate season. The fuels
industry automatically modifies the
fuel for the appropriate season.
If fuel is left in the vehicle tank for
long periods of time, driving or
starting could be affected. Drive the
vehicle until the fuel is at one-half
tank or less, then refuel with the
current seasonal fuel.
Prohibited Fuels
Gasolines containing oxygenates
such as ethers and ethanol, as well
as reformulated gasolines, are
available in some cities. If these
gasolines comply with the
previously described specification,
then they are acceptable to use.
However, E85 (85% ethanol) andother fuels containing more than
15% ethanol must be used only in
FlexFuel vehicles.
Caution
Do not use fuel containing
methanol. It can corrode metal
parts in the fuel system and also
damage plastic and rubber parts.
That damage would not be
covered under the vehicle
warranty.
Some gasolines, mainly high octane
racing gasolines, can contain an
octane-enhancing additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT). Do not use
gasolines and/or fuel additives with
MMT as they can reduce spark plug
life and affect emission control
system performance. The
malfunction indicator lamp may turn
on. If this occurs, see your dealer
for service.
California Fuel
Requirements
If the vehicle is certified to meet
California Emissions Standards, it is
designed to operate on fuels that
meet California specifications. See
the underhood emission control
label. If this fuel is not available in
states adopting California Emissions
Standards, the vehicle will operate
satisfactorily on fuels meeting
federal specifications, but emission
control system performance might
be affected. The malfunction
indicator lamp could turn on and the
vehicle may not pass a smog-check
test. See Malfunction Indicator
Lamp (Check Engine Light) 0142.
If this occurs, return to your
authorized dealer for diagnosis. If it
is determined that the condition is
caused by the type of fuel used,
repairs may not be covered by the
vehicle warranty.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
272 Driving and Operating
If the CHECK TRAILER
WIRING message only
reappears when connecting the
trailer wiring harness to the
vehicle, the electrical fault is on
the trailer side.
SERVICE TRAILER BRAKE
SYSTEM: This message will display
when there is a problem with the
ITBC system. If this message
continues over multiple ignition
cycles, there is a problem with the
ITBC system. Have the vehicle
serviced.
If either the CHECK TRAILER
WIRING or SERVICE TRAILER
BRAKE SYSTEM message displays
while driving, the ITBC system may
not be fully functional or may not
function at all. When traffic
conditions allow, carefully pull the
vehicle over to the side of the road
and turn the ignition off. Check the
wiring connection to the trailer and
turn the ignition back on. If either of
these messages continues, either
the vehicle or trailer needs service. A GM dealer may be able to
diagnose and repair problems with
the trailer. However, any diagnosis
and repair of the trailer is not
covered under the vehicle warranty.
Contact your trailer dealer for
assistance with trailer repairs and
trailer warranty information.
Trailer Sway
Control (TSC)
Vehicles with StabiliTrak have a
TSC feature. Trailer sway is
unintended side-to-side motion of a
trailer while being towed. If the
vehicle is towing a trailer and the
TSC detects that sway is increasing,
the vehicle brakes are selectively
applied at each wheel, to help
reduce excessive trailer sway. If the
vehicle is equipped with the
Integrated Trailer Brake Control
(ITBC) system, and the trailer has
the electric actuated brake system,
StabiliTrak may also apply the trailer
brakes.
If TSC is enabled, the Traction
Control System (TCS)/StabiliTrak
warning light will flash on theinstrument cluster. Vehicle speed
must be reduced. If trailer sway
continues, StabiliTrak can reduce
engine torque to help slow the
vehicle. See
Traction Control/
Electronic Stability Control 0232.
{Warning
Even if the vehicle is equipped
with TSC, trailer sway could result
in loss of control and the vehicle
could crash. If excessive trailer
sway is detected, slow down to a
safe speed. Check the trailer and
vehicle to help correct possible
causes. These could include an
improperly or overloaded trailer,
unrestrained cargo, improper
trailer hitch configuration,
excessive vehicle-trailer speed,
or improperly inflated or incorrect
vehicle or trailer tires. See Towing
Equipment 0266 for trailer ratings
and hitch setup
recommendations.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Driving and Operating 273
Adding non-dealer accessories can
affect the vehicle performance. See
Accessories and
Modifications0275.Conversions and
Add-Ons
Add-On Electrical
Equipment
{Warning
The Data Link Connector (DLC) is
used for vehicle service and
Emission Inspection/Maintenance
testing. See Malfunction Indicator
Lamp (Check Engine Light)
0 142. A device connected to the
DLC —such as an aftermarket
fleet or driver-behavior tracking
device —may interfere with
vehicle systems. This could affect
vehicle operation and cause a
crash. Such devices may also
access information stored in the
vehicle’s systems.
Caution
Some electrical equipment can
damage the vehicle or cause
components to not work and
would not be covered by the
vehicle warranty. Always check
with your dealer before adding
electrical equipment.
Add-on equipment can drain the
vehicle's 12-volt battery, even if the
vehicle is not operating.
The vehicle has an airbag system.
Before attempting to add anything
electrical to the vehicle, see
Servicing the Airbag-Equipped
Vehicle 096 and Adding Equipment
to the Airbag-Equipped
Vehicle 097.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
274 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . 275
California Proposition65 Warning . . . . . . . . . . . . . . . . . 275
California Perchlorate Materials Requirements . . . . . 275
Accessories and Modifications . . . . . . . . . . . . . . . . 275
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 276
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 277
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 278
Engine Oil . . . . . . . . . . . . . . . . . . . . 279
Engine Oil Life System . . . . . . . 281
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 282
Engine Air Cleaner/Filter . . . . . . 285
Cooling System . . . . . . . . . . . . . . 286
Engine Coolant . . . . . . . . . . . . . . . 287
Engine Overheating . . . . . . . . . . 289
Engine Fan . . . . . . . . . . . . . . . . . . . 291
Washer Fluid . . . . . . . . . . . . . . . . . 291
Brakes . . . . . . . . . . . . . . . . . . . . . . . 292
Brake Fluid . . . . . . . . . . . . . . . . . . . 293
Battery - North America . . . . . . 294 Four-Wheel Drive . . . . . . . . . . . . . 294
Front Axle . . . . . . . . . . . . . . . . . . . . 295
Rear Axle . . . . . . . . . . . . . . . . . . . . 296
Noise Control System . . . . . . . . 296
Starter Switch Check . . . . . . . . . 297
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 298
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . 298
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 298
Wiper Blade Replacement . . . . 299
Glass Replacement . . . . . . . . . . 300
Windshield Replacement . . . . . 300
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 300
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 301
Halogen Bulbs . . . . . . . . . . . . . . . . 301
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 301
LED Lighting . . . . . . . . . . . . . . . . . 301
Headlamps . . . . . . . . . . . . . . . . . . . 301
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 302
License Plate Lamp . . . . . . . . . . 303
Replacement Bulbs . . . . . . . . . . . 304
Electrical System
Electrical System Overload . . . 304
Fuses . . . . . . . . . . . . . . . . . . . . . . . . 304
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 305
Instrument Panel Fuse
Block (Left) . . . . . . . . . . . . . . . . . 308
Instrument Panel Fuse Block (Right) . . . . . . . . . . . . . . . . . . . . . . 311
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 313
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 314
All-Season Tires . . . . . . . . . . . . . . 315
Winter Tires . . . . . . . . . . . . . . . . . . 315
Low-Profile Tires . . . . . . . . . . . . . 316
All-Terrain Tires . . . . . . . . . . . . . . . 316
Tire Sidewall Labeling . . . . . . . . 316
Tire Designations . . . . . . . . . . . . . 317
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 318
Tire Pressure . . . . . . . . . . . . . . . . . 321
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . 322
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 323
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 324
Tire Inspection . . . . . . . . . . . . . . . . 327
Tire Rotation . . . . . . . . . . . . . . . . . 327

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Vehicle Care 285
5. Safe operating level is withinthe HOT cross hatch band on
the dipstick. If the fluid level is
not within the HOT band, and
the transmission temperature is
between 71 °C and 93 °C
(160 °F and 200 °F), add or
drain fluid as necessary to
bring the level into the HOT
band. If the fluid level is low,
add only enough fluid to bring
the level into the HOT band.
It does not take much fluid,
generally less than 0.5 L (1 pt).
Do not overfill.
6. If the fluid level is in the acceptable range, push the
dipstick back in all the way,
then flip the handle down to
lock the dipstick in place.
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
See Engine Compartment Overview
0 278 for the location of the engine
air cleaner/filter.
When to Inspect the Engine Air
Cleaner/Filter
For intervals on changing and
inspecting the engine air cleaner/
filter, see Maintenance
Schedule 0364.
How to Inspect the Engine Air
Cleaner/Filter
Do not start the engine or have the
engine running with the engine air
cleaner/filter housing open. Before
removing the engine air cleaner/
filter, make sure that the engine air
cleaner/filter housing and nearby
components are free of dirt and debris. Remove the engine air
cleaner/filter. Lightly tap and shake
the engine air cleaner/filter (away
from the vehicle), to release loose
dust and dirt. Inspect the engine air
cleaner/filter for damage, and
replace if damaged. Do not clean
the engine air cleaner/filter or
components with water or
compressed air.
To inspect or replace the engine air
cleaner/filter:
1. Screws (4)
2. Electrical Connector
3. Air Duct Clamp

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
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Vehicle Care 293
Replacing Brake System Parts
Always replace brake system parts
with new, approved replacement
parts. If this is not done, the brakes
may not work properly. The braking
performance expected can change
in many other ways if the wrong
replacement brake parts are
installed or if parts are improperly
installed.
Brake Fluid
The brake master cylinder reservoir
is filled with GM approved DOT 3
brake fluid as indicated on the
reservoir cap. SeeEngine
Compartment Overview 0278 for
the location of the reservoir. Checking Brake Fluid
With the vehicle in P (Park) on a
level surface, the brake fluid level
should be between the minimum
and maximum marks on the brake
fluid reservoir.
There are only two reasons why the
brake fluid level in the reservoir may
go down:
.
Normal brake lining wear. When
new linings are installed, the
fluid level goes back up.
. A fluid leak in the brake
hydraulic system. Have the
brake hydraulic system fixed.
With a leak, the brakes will not
work well.
Always clean the brake fluid
reservoir cap and the area around
the cap before removing it.
Do not top off the brake fluid.
Adding fluid does not correct a leak.
If fluid is added when the linings are
worn, there will be too much fluid
when new brake linings are
installed. Add or remove fluid, as
necessary, only when work is done
on the brake hydraulic system.
{Warning
If too much brake fluid is added, it
can spill on the engine and burn,
if the engine is hot enough. You
or others could be burned, and
the vehicle could be damaged.
Add brake fluid only when work is
done on the brake hydraulic
system.
When the brake fluid falls to a low
level, the brake warning light comes
on. See Brake System Warning
Light 0144.
Brake fluid absorbs water over time
which degrades the effectiveness of
the brake fluid. Replace brake fluid
at the specified intervals to prevent
increased stopping distance. See
Maintenance Schedule 0364.
What to Add
Use only GM approved DOT 3
brake fluid from a clean, sealed
container. See Recommended
Fluids and Lubricants 0373.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Service and Maintenance 371
.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 have
access to tools and equipment
to inspect the belts and
recommend adjustment or
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 0373 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.
. As part of the multi-point
inspection, trained dealer
technicians can visually inspect
the shocks and struts for signs

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
404 Index
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . . . 275
Accessory Power . . . . . . . . . . . . . . . 216
Active Fuel Management
®. . . . . . 219
Adaptive Cruise Control . . . . . . . . 238
Add-On Electrical Equipment . . . 273
Additional Information OnStar
®. . . . . . . . . . . . . . . . . . . . . . 398
Additional Maintenance
and Care . . . . . . . . . . . . . . . . . . . . . . 370
Adjustable Throttle and Brake Pedal . . . . . . . . . . . . . . . . . . . 209
Adjustments
Lumbar, Front Seats . . . . . . . . . . . . 64
Air Cleaner/Filter, Engine . . . . . . . 285
Air Filter, Passenger Compartment . . . . . . . . . . . . . . . . . 190
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 189
Airbag System
Check . . . . . . . . . . . . . . . . . . . . . . . . . . 97
How Does an AirbagRestrain? . . . . . . . . . . . . . . . . . . . . . 90
Passenger Sensing System . . . . 92
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 90
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . . 91 Airbag System (cont'd)
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 89
Where Are the Airbags? . . . . . . . . 88
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . 97
Passenger Status Indicator . . . 141
Readiness Light . . . . . . . . . . . . . . 140
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . 96
System Check . . . . . . . . . . . . . . . . . . 86
Alarm Vehicle Security . . . . . . . . . . . . . . . . 49
Alert Lane Change . . . . . . . . . . . . . . . . . 252
Side Blind Zone (SBZA) . . . . . . 251
All-Season Tires . . . . . . . . . . . . . . . . 315
All-Terrain Tires . . . . . . . . . . . . . . . . . 316
Antilock Brake System (ABS) . . . 230
Warning Light . . . . . . . . . . . . . . . . . 145
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . 354
Interior . . . . . . . . . . . . . . . . . . . . . . . . 358
Armrest Storage . . . . . . . . . . . . . . . . 120
Assistance Program, Roadside . . . . . . . . . . . . . . . . . . . . . . 384

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Index 405
Assistance Systems forDriving . . . . . . . . . . . . . . . . . . . . . . . . 248
Assistance Systems for Parking and Backing . . . . . . . . . . 245
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . 54
Door Locks . . . . . . . . . . . . . . . . . . . . . 43
Headlamp System . . . . . . . . . . . . 177
Level Control . . . . . . . . . . . . . . . . . 235
Transmission . . . . . . . . . . . . . . . . . 220
Transmission Fluid . . . . . . . . . . . 282
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . 222
Shift Lock Control FunctionCheck . . . . . . . . . . . . . . . . . . . . . . . 298
Axle, Front . . . . . . . . . . . . . . . . . . . . . . 295
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . 296
B
Battery Load Management . . . . . . . . . . . . 181
Power Protection . . . . . . . . . . . . . 182
Voltage and Charging
Messages . . . . . . . . . . . . . . . . . . . 152
Battery - North America . . . . 294, 345
Blade Replacement, Wiper . . . . . 299
Blind Spot Mirrors . . . . . . . . . . . . . . . 54 Brake
Pedal and Adjustable
Throttle . . . . . . . . . . . . . . . . . . . . . . 209
System Warning Light . . . . . . . . 144
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 292 Antilock . . . . . . . . . . . . . . . . . . . . . . . 230
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 231
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Parking . . . . . . . . . . . . . . . . . . . . . . . 231
System Messages . . . . . . . . . . . . 153
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 194
Break-In, New Vehicle . . . . . . . . . . 209
Bulb Replacement . . . . . . . . . . . . . . 304
Fog Lamps . . . . . . . . . . . . . . . . . . . 179
Halogen Bulbs . . . . . . . . . . . . . . . . 301
Headlamp Aiming . . . . . . . . . . . . . 300
Headlamps . . . . . . . . . . . . . . . . . . . 301
High Intensity Discharge(HID) Lighting . . . . . . . . . . . . . . . 301
License Plate Lamps . . . . . . . . . 303
Taillamps, Turn Signal, Stoplamps, and Back-up
Lamps . . . . . . . . . . . . . . . . . . . . . . 302
Buying New Tires . . . . . . . . . . . . . . . 329
C
Calibration . . . . . . . . . . . . . . . . . . . . . . 128
California Fuel Requirements . . . . . . . . . . . 256
Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . 275
California Proposition
65 Warning . . . . . . . . . .275, 294, 345
Canadian Vehicle Owners . . . . . . . . 2
Capacities and
Specifications . . . . . . . . . . . . . . . . . 378
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . 219
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . 44
Winter Driving . . . . . . . . . . . . . . . . 202
Cargo Cover . . . . . . . . . . . . . . . . . . . . . . . . . 121
Caution, Danger, and Warning . . . . 2
Center Console Storage . . . . . . . . 120
Center Seat . . . . . . . . . . . . . . . . . . . . . 63
Chains, Tire . . . . . . . . . . . . . . . . . . . . 333
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . 131
Charging System Light . . . . . . . . . 142
Check Ignition Transmission Lock . . . 298