2008 GMC YUKON DENALI ABS

If you use a step-bumper hitch, the bumper could be
damaged in sharp turns. Make sure there is ample room
when turning to avoid contact between the trailer and
the bumper.
If you will be pulling a trailer that, when loaded, will
weigh more than 5,000 lbs (2 270 kg) be sure to use a
properly mounted weight-distributing hitch and sway
control of the proper size. This equipment is very
important for proper vehicle loading and good handling
when driving. Always use a sway control if the trailer
will weigh more than these limits. You can ask a
hitch dealer about sway controls.
Hitch Cover
Your vehicle may have a hitch cover. To remove the
hitch cover:
1. Turn the fasteners on the lower tabs 90 degrees
counterclockwise.
2. Lift the lower edge of the cover about 45 degrees.
3. Pull the cover downward to disengage the upper
attachments.To reinstall the hitch cover:
1. Hold the cover at a 45 degree angle to the vehicle
and push the upper tabs in the hitch cover into the
chrome slots in the fascia.
2. Move the bottom of the cover forward until the
lower tabs line up with the lower fascia slots.
3. Snap the hitch cover into place by pushing the
upper corners forward.
4. Turn the fasteners on the lower tabs 90 degrees
clockwise to lock the cover in place.
4-49

Parking on Hills
{CAUTION:
You really should not park your vehicle, with a
trailer attached, on a hill. If something goes
wrong, your rig could start to move. People
can be injured, and both your vehicle and the
trailer can be damaged.
But if you ever have to park your rig on a hill, here’s
how to do it:
1. Apply your regular brakes, but don’t shift into
PARK (P) yet.
2. Have someone place chocks under the trailer
wheels.
3. When the wheel chocks are in place, release the
regular brakes until the chocks absorb the load.
4. Reapply the regular brakes. Then apply your
parking brake and shift into PARK (P).
5. Release the regular brakes.
When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal down
while you:
start your engine,
shift into a gear, and
release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the
chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re
pulling a trailer. See the Maintenance Schedule for more
on this. Things that are especially important in trailer
operation are automatic transmission uid (don’t overll),
engine oil, axle lubricant, belts, cooling system and
brake system. Each of these is covered in this manual,
and the Index will help you nd them quickly. If
you’re trailering, it’s a good idea to review these sections
before you start your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
4-53

8. Put the wheel nuts back on with the rounded end
of the nuts toward the wheel after mounting the
spare tire.
9. Tighten each wheel nut by hand. Then use the
wheel wrench to tighten the nuts until the wheel
is held against the hub.
10. Turn the wheel wrench counterclockwise to lower
the vehicle. Lower the jack completely.
{CAUTION:
Incorrect or improperly tightened wheel nuts
can cause the wheel to come loose and even
come off. This could lead to a crash. If you
have to replace them, be sure to get new
original equipment wheel nuts. Stop
somewhere as soon as you can and have the
nuts tightened with a torque wrench to the
proper torque specication. SeeCapacities and
Specifications on page 5-114for wheel nut
torque specication.Notice:Improperly tightened wheel nuts can lead
to brake pulsation and rotor damage. To avoid
expensive brake repairs, evenly tighten the wheel
nuts in the proper sequence and to the proper
torque specication. SeeCapacities and
Specifications on page 5-114for the wheel nut
torque specication.
11. Tighten the nuts rmly
in a crisscross
sequence as shown
by turning the
wheel wrench
clockwise.
When you reinstall the regular wheel and tire, you must
also reinstall the center cap, if your vehicle has one.
Line up the tabs on the back of the center cap with the
slot on the wheel. The cap only goes in one way.
Place the cap on the wheel and gently press until it
snaps into place.
5-89

Fabric/Carpet
Use a vacuum cleaner with a soft brush attachment
frequently to remove dust and loose dirt. A canister
vacuum with a beater bar in the nozzle may only be
used on oor carpet and carpeted oor mats. For soils,
always try to remove them rst with plain water or club
soda. Before cleaning, gently remove as much of the soil
as possible using one of the following techniques:
For liquids: gently blot the remaining soil with a paper
towel. Allow the soil to absorb into the paper towel
until no more can be removed.
For solid dry soils: remove as much as possible and
then vacuum.
To clean, use the following instructions:
1. Saturate a lint-free, clean white cloth with water or
club soda.
2. Wring the cloth to remove excess moisture.
3. Start on the outside edge of the soil and gently rub
toward the center. Continue cleaning, using a clean
area of the cloth each time it becomes soiled.
4. Continue to gently rub the soiled area until the
cleaning cloth remains clean.
5. If the soil is not completely removed, use a mild
soap solution and repeat the cleaning process
that was used with plain water.If any of the soil remains, a commercial fabric cleaner or
spot lifter may be necessary. When a commercial
upholstery cleaner or spot lifter is to be used, test a
small hidden area for colorfastness rst. If the locally
cleaned area gives any impression that a ring formation
may result, clean the entire surface.
After the cleaning process has been completed, a paper
towel can be used to blot excess moisture from the
fabric or carpet.
Leather
A soft cloth dampened with water can be used to
remove dust. If a more thorough cleaning is necessary,
a soft cloth dampened with a mild soap solution can
be used. Allow the leather to dry naturally. Do not use
heat to dry. Never use steam to clean leather. Never
use spot lifters or spot removers on leather. Many
commercial leather cleaners and coatings that are sold
to preserve and protect leather may permanently
change the appearance and feel of your leather and are
not recommended. Do not use silicone or wax-based
products, or those containing organic solvents to clean
your vehicle’s interior because they can alter the
appearance by increasing the gloss in a non-uniform
manner. Never use shoe polish on leather.
5-100

A
Accessories and Modications............................ 5-3
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-90
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-108
Adjustable Throttle and Brake Pedal..................2-29
Air Cleaner/Filter, Engine.................................5-17
Air Conditioning..............................................3-23
Airbag
Passenger Status Indicator...........................3-35
Readiness Light..........................................3-34
Airbag System................................................1-75
What Will You See After an Airbag Inates?....1-84
When Should an Airbag Inate?....................1-81
Where Are the Airbags?...............................1-78
Airbag Systems
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-90
How Does an Airbag Restrain?......................1-83
Passenger Sensing System...........................1-85
Servicing Your Airbag-Equipped Vehicle..........1-90
What Makes an Airbag Inate?......................1-83
All-Wheel Drive...............................................5-45
All-Wheel-Drive (AWD) System........................... 4-8
Antenna, Rear Side Window...........................3-119
Antenna, XM™ Satellite Radio Antenna System . . . 3-119
Antilock Brake System (ABS)............................. 4-4
Antilock Brake, System Warning Light................3-40Appearance Care
Aluminum Wheels......................................5-104
Care of Safety Belts...................................5-101
Chemical Paint Spotting..............................5-105
Cleaning Exterior Lamps/Lenses..................5-102
Fabric/Carpet............................................5-100
Finish Care...............................................5-102
Finish Damage..........................................5-105
Instrument Panel, Vinyl, and Other Plastic
Surfaces...............................................5-101
Interior Cleaning..........................................5-98
Leather....................................................5-100
Sheet Metal Damage..................................5-105
Speaker Covers.........................................5-101
Tires........................................................5-104
Underbody Maintenance.............................5-105
Vehicle Care/Appearance Materials...............5-106
Washing Your Vehicle.................................5-102
Weatherstrips............................................5-101
Windshield, Backglass, and Wiper Blades......5-103
Wood Panels............................................5-101
Appointments, Scheduling Service....................... 7-8
Ashtray.........................................................3-22
Audio System.................................................3-73
Audio Steering Wheel Controls....................3-117
Navigation/Radio System, see Navigation
Manual.................................................3-105
Radio Reception........................................3-118
Rear Seat Audio (RSA)...............................3-115
Setting the Clock.........................................3-74
1