2010 GMC YUKON DENALI check engine light

Gasoline Octane
Use premium unleaded gasoline with a posted octane
rating of 91 or higher. You can also use regular
unleaded gasoline rated at 87 octane or higher, but the
vehicle's acceleration could be slightly reduced, and a
slight audible knocking noise, commonly referred to as
spark knock, might be heard. If the octane is less than
87, you might notice a heavy knocking noise when you
drive. If this occurs, use a gasoline rated at 87 octane
or higher as soon as possible. Otherwise, you could
damage the engine. If heavy knocking is heard when
using gasoline rated at 87 octane or higher, the engine
needs service.
Gasoline Specifications
At a minimum, gasoline should meet ASTM
specification D 4814 in the United States or
CAN/CGSB‐3.5 or 3.511 in Canada. Some gasolines
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl (MMT).
We recommend against the use of gasolines containing
MMT. SeeAdditives
on page 6‑6for additional
information.
California Fuel
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 might fail a smog‐check test.
See Malfunction Indicator Lamp
on page 4‑35. If this
occurs, return to your authorized dealer/retailer for
diagnosis. If it is determined that the condition is caused
by the type of fuel used, repairs might not be covered
by the vehicle warranty.
Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that help prevent
engine and fuel system deposits from forming, allowing
the emission control system to work properly. In most
cases, nothing should have to be added to the fuel.
However, some gasolines contain only the minimum
amount of additive required to meet U.S. Environmental
Protection Agency regulations. To help keep fuel
injectors and intake valves clean, or if the vehicle
6-6

Brakes
Brake Fluid
The brake master cylinder
reservoir is filled with
DOT 3 brake fluid. See
Engine Compartment
Overview
on page 6‑14for the location of the
reservoir.
There are only two reasons why the brake fluid level in
the reservoir might go down:
.The brake fluid level goes down because of normal
brake lining wear. When new linings are installed,
the fluid level goes back up.
.A fluid leak in the brake hydraulic system can also
cause a low fluid level. Have the brake hydraulic
system fixed, since a leak means that sooner or
later the brakes will not work well. 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 brake 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.
See
“Checking Brake Fluid” in this section.
When the brake fluid falls to a low level, the brake
warning light comes on. See Brake System Warning
Light on page 4‑32.
Refer to the Maintenance Schedule to determine when
to check the brake fluid. See Scheduled Maintenance
on page 7‑3.
6-38

{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 an open flame 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.
Be sure the battery has enough water. You do not
need to add water to the battery installed in your
new vehicle. But if a battery has filler caps, be
sure the right amount of fluid is there. If it is low,
add water to take care of that first. If you do not,
explosive gas could be present.
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.
5. Check that the jumper cables do not 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.
6-44

A
Accessories and Modifications . . . . . . . . . . . . . . . . . . . . . . .6-3
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Accessory Power Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Active Fuel Management™. . . . . . . . . . . . . . . . . . . . . . . . 3-29
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . . . . . 6-106
Additives, Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Adjustable Throttle and Brake Pedal . . . . . . . . . . . . . . . 3-28
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Airbag Adding Equipment to Your Airbag-Equipped
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-91
Airbag System How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . 2-83
Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . . 2-85
Servicing Your Airbag-Equipped Vehicle . . . . . . . . . . 2-91
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . 2-83
What Will You See After an Airbag Inflates? . . . . . . 2-84
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . 2-81
Where Are the Airbags? . . . . . . . . . . . . . . . . . . . . . . . . . . 2-78
Airbags Passenger Status Indicator . . . . . . . . . . . . . . . . . . . . . . . 4-29
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-75 All-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-47
All-Wheel-Drive (AWD) System . . . . . . . . . . . . . . . . . . . . . .5-9
Antenna
Rear Side Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-136
Antenna, XM™ Satellite Radio Antenna
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-136
Antilock Brake System (ABS) . . . . . . . . . . . . . . . . . . . . . . . .5-4
Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33
Appearance Care Aluminum Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-104
Care of Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-101
Chemical Paint Spotting . . . . . . . . . . . . . . . . . . . . . . . . .6-105
Cleaning Exterior Lamps/Lenses . . . . . . . . . . . . . . . .6-102
Fabric/Carpet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-100
Finish Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-102
Finish Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-105
Instrument Panel, Vinyl, and Other PlasticSurfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-101
Interior Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-98
Leather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-100
Sheet Metal Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-104
Speaker Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-101
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-104
Underbody Maintenance . . . . . . . . . . . . . . . . . . . . . . . . .6-105
i - 1

C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53
CaliforniaPerchlorate Materials Requirements . . . . . . . . . . . . . . . 6-4
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
California Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Camera, Rear Vision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-50
Canadian Owners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Capacities and Specifications . . . . . . . . . . . . . . . . . . . . . 6-115
Carbon Monoxide . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12, 3-14 Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27
Care of Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-101
Cargo Tie Downs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-66
Cargo Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-65
CD, MP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-94, 4-101
Center Console Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-78
Charging System Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
Check Engine Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35
Checking Things Under the Hood . . . . . . . . . . . . . . . . . . 6-12
Chemical Paint Spotting . . . . . . . . . . . . . . . . . . . . . . . . . . 6-105 Child Restraints
Infants and Young Children . . . . . . . . . . . . . . . . . . . . . . . 2-52
Lower Anchors and Tethers for Children . . . . . . . . . . 2-59
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-49
Securing a Child Restraint in a Rear Seat
Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
Securing a Child Restraint in the Center Front
Seat Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-70
Securing a Child Restraint in the Right Front Seat Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Where to Put the Restraint . . . . . . . . . . . . . . . . . . . . . . . 2-58
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-107
Cleaning Aluminum Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-104
Exterior Lamps/Lenses . . . . . . . . . . . . . . . . . . . . . . . . . .6-102
Fabric/Carpet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-100
Finish Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-102
Instrument Panel, Vinyl, and Other PlasticSurfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-101
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-98
Leather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-100
Speaker Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-101
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-104
i - 3

Fuel EconomyDriving for Better . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Fuses Center Instrument Panel Fuse Block . . . . . . . . . . . . . 6-110
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . . .6-107
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . .6-108
Underhood Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . 6-111
Windshield Wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-107
G
GagesEngine Coolant Temperature . . . . . . . . . . . . . . . . . . . . . 4-34
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41
Oil Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Voltmeter Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-55
Gasoline Octane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-62
GM Mobility Reimbursement Program . . . . . . . . . . . . . . .8-7
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-53
Hazard Warning Flashers . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-50
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-52
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . . 4-12
Exterior Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
High/Low Beam Changer . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Heated Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Heater Engine Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
High-Speed Operation, Tires . . . . . . . . . . . . . . . . . . . . . . 6-66
Highbeam On Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
Highway Hypnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Hill and Mountain Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Hood Checking Things Under . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
How to Wear Safety Belts Properly . . . . . . . . . . . . . . . . 2-31
i - 7

N
Navigation System, Privacy . . . . . . . . . . . . . . . . . . . . . . . . 8-19
Navigation/Radio System, see NavigationManual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-110
Net, Convenience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64
New Vehicle Break-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
O
Object Detection, Side Blind Zone Alert (SBZA) . . . 3-47
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Engine Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Pressure Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39
Older Children, Restraints . . . . . . . . . . . . . . . . . . . . . . . . . 2-49
Online Owner Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
OnStar, Privacy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19
OnStar
®System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Operation, Universal Home Remote System . . . . . . . 3-55
Outlet Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 Outlets
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Outside Convex Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44
Power Foldaway Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42
Overheated Engine Protection Operating Mode . . . . 6-35
Owner Checks and Services . . . . . . . . . . . . . . . . . . . . . . . . .7-9
Owners, Canadian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
P
Paint, Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-105
Park
Shifting Into . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37
Shifting Out of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
Park Aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-45
Park Tilt Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44
Parking Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-45
Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36
Over Things That Burn . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
PASS-Key
®III+ Electronic Immobilizer . . . . . . . . . . . . . 3-22
PASS-Key®III+ Electronic Immobilizer
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . 4-29
Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . . . 2-85
i - 10