height GMC YUKON 2007 User Guide

To adjust the vertical aim, do the following:
1. Open the hood. SeeHood Release on
page 429for more information.
2. Locate the aim dot on the lens of the
low-beam headlamp.
3. Measure the distance from the ground to
the aim dot on the low-beam headlamp.
Record the distance.4. At the wall or other at surface, measure from
the ground upward (A) to the recorded
distance from Step 3 and mark it.
5. Draw or tape a horizontal line (B) on the wall
or at surface the width of the vehicle at the
height of the mark in Step 4.
Notice:Do not cover a headlamp to improve
beam cut-off when aiming. Covering a
headlamp may cause excessive heat build-up
which may cause damage to the headlamp.
6. Turn on the low-beam headlamps and place a
piece of cardboard or equivalent in front of the
headlamp not being adjusted. This allows
only the beam of light from the headlamp
being adjusted to be seen on the at surface.
474

20-Inch Tires
If your vehicle has the optional 20-inch
P275/55R20 size tires, they are classied as
touring tires and are designed for on road use.
The low-prole, wide tread design is not
recommended for off-road driving. SeeOff-Road
Driving on page 359, for additional information.
Tire Sidewall Labeling
Useful information about a tire is molded into the
sidewall. The following illustration is an example
of a typical P-Metric tire sidewall.
(A) Tire Size:The tire size code is a combination
of letters and numbers used to dene a particular
tire’s width, height, aspect ratio, construction
type, and service description. See the “Tire Size”
illustration later in this section for more detail.
Passenger (P-Metric) Tire
482

Tire Size
The following examples show the different parts of
a tire size.
(A) Passenger (P-Metric) Tire:The United
States version of a metric tire sizing system.
The letter P as the rst character in the tire size
means a passenger vehicle tire engineered
to standards set by the U.S. Tire and Rim
Association.
(B) Tire Width:The three-digit number indicates
the tire section width in millimeters from sidewall
to sidewall.(C) Aspect Ratio:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is 75,
as shown in item C of the light truck (LT-Metric)
tire illustration, it would mean that the tire’s sidewall
is 75% as high as it is wide.
(D) Construction Code:A letter code is used
to indicate the type of ply construction in the tire.
The letter R means radial ply construction; the
letter D means diagonal or bias ply construction;
and the letter B means belted-bias ply
construction.
(E) Rim Diameter:Diameter of the wheel in
inches.
(F) Service Description:The service description
indicates the load range and speed rating of a
tire. The load index can range from 1 to 279.
Speed ratings range from A to Z.
Passenger (P-Metric) Tire
484

Tire Terminology and Denitions
Air Pressure:The amount of air inside the tire
pressing outward on each square inch of the
tire. Air pressure is expressed in pounds
per square inch (psi) or kilopascal (kPa).
Accessory Weight:This means the combined
weight of optional accessories. Some examples of
optional accessories are, automatic transmission,
power steering, power brakes, power windows,
power seats, and air conditioning.
Aspect Ratio:The relationship of a tire’s height
to its width.
Belt:A rubber coated layer of cords that is
located between the plies and the tread. Cords
may be made from steel or other reinforcing
materials.
Bead:The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the rim.
Bias Ply Tire:A pneumatic tire in which the plies
are laid at alternate angles less than 90 degrees
to the centerline of the tread.Cold Tire Pressure:The amount of air pressure
in a tire, measured in pounds per square inch
(psi) or kilopascals (kPa) before a tire has built up
heat from driving. SeeInation - Tire Pressure
on page 488.
Curb Weight:This means the weight of a motor
vehicle with standard and optional equipment
including the maximum capacity of fuel, oil, and
coolant, but without passengers and cargo.
DOT Markings:A code molded into the sidewall
of a tire signifying that the tire is in compliance
with the U.S. Department of Transportation (DOT)
motor vehicle safety standards. The DOT code
includes the Tire Identication Number (TIN),
an alphanumeric designator which can also identify
the tire manufacturer, production plant, brand,
and date of production.
GVWR:Gross Vehicle Weight Rating. See
Loading Your Vehicle on page 392.
GAWR FRT:Gross Axle Weight Rating for the
front axle. SeeLoading Your Vehicle on page 392.
GAWR RR:Gross Axle Weight Rating for the
rear axle. SeeLoading Your Vehicle on page 392.
485

Wheel Replacement
Replace any wheel that is bent, cracked, or badly
rusted or corroded. If wheel nuts keep coming
loose, the wheel, wheel bolts, and wheel
nuts should be replaced. If the wheel leaks air,
replace it (except some aluminum wheels,
which can sometimes be repaired). See your
dealer if any of these conditions exist.
Your dealer will know the kind of wheel you need.
Each new wheel should have the same
load-carrying capacity, diameter, width, offset
and be mounted the same way as the one
it replaces.
If you need to replace any of your wheels, wheel
bolts, or wheel nuts, replace them only with
new GM original equipment parts. This way,
you will be sure to have the right wheel, wheel
bolts, and wheel nuts for your vehicle.{CAUTION:
Using the wrong replacement wheels,
wheel bolts, or wheel nuts on your vehicle
can be dangerous. It could affect the
braking and handling of your vehicle,
make your tires lose air and make you
lose control. You could have a collision
in which you or others could be injured.
Always use the correct wheel, wheel bolts,
and wheel nuts for replacement.
Notice:The wrong wheel can also cause
problems with bearing life, brake cooling,
speedometer or odometer calibration,
headlamp aim, bumper height, vehicle ground
clearance, and tire or tire chain clearance
to the body and chassis.
SeeChanging a Flat Tire on page 506for more
information.
503

Recreational Vehicle Towing........................ 398
Remote Keyless Entry System.................... 114
Remote Keyless Entry System, Operation ... 116
Removing the Flat Tire and Installing the
Spare Tire................................................ 512
Removing the Spare Tire and Tools............ 507
Replacement Bulbs..................................... 478
Reporting Safety Defects
Canadian Government............................. 588
General Motors........................................ 589
United States Government....................... 588
Restraint System Check
Checking the Restraint Systems............... 108
Replacing Restraint System Parts After a
Crash................................................... 109
Retained Accessory Power (RAP)................ 141
Right Front Passenger Position, Safety
Belts.......................................................... 51
Roadside
Assistance Program................................. 575
Rocking Your Vehicle to Get it Out.............. 390
Routing, Engine Drive Belt.......................... 564
Running Boards, Power............................... 132
Running the Engine While Parked............... 157S
Safety Belt
Passenger Reminder Light....................... 228
Pretensioners............................................. 60
Reminder Light........................................ 228
Safety Belts
Care of.................................................... 530
Center Front Passenger Position................ 52
Driver Position........................................... 43
How to Wear Safety Belts Properly............ 43
Questions and Answers About Safety
Belts....................................................... 42
Rear Safety Belt Comfort Guides............... 56
Rear Seat Passengers............................... 53
Right Front Passenger Position.................. 51
Safety Belt Extender.................................. 60
Safety Belt Use During Pregnancy............. 51
Safety Belts Are for Everyone.................... 38
Shoulder Belt Height Adjuster.................... 50
Safety Warnings and Symbols......................... 4
Scheduled Maintenance............................... 551
Seats
60/40 Split Bench Seat.............................. 18
Bucket Seats, Rear.................................... 25
Head Restraints......................................... 16
Heated Seats............................................. 11
604

Seats (cont.)
Heated Seats - Rear.................................. 17
Memory, Mirrors and Pedals...................... 12
Power Lumbar........................................... 10
Power Reclining Seatbacks........................ 14
Power Seats................................................ 9
Third Row Seat......................................... 32
Secondary Latch System............................. 518
Securing a Child Restraint
Center Front Seat Position......................... 85
Rear Seat Position..................................... 83
Right Front Seat Position........................... 86
Security Light.............................................. 241
Service........................................................ 420
Accessories and Modications.................. 421
Adding Equipment to the Outside of
Your Vehicle......................................... 423
California Proposition 65 Warning............. 421
Doing Your Own Work............................. 422
Engine Soon Light................................... 237
Publications Ordering Information............. 589
Servicing Your Airbag-Equipped Vehicle....... 106
Setting the Time.................................274, 275
Sheet Metal Damage................................... 533
Shifting Into Park (P)................................... 153
Shifting Out of Park (P)............................... 154
Shoulder Belt Height Adjuster........................ 50Signals, Turn and Lane-Change.................. 194
Spare Tire................................................... 526
Installing.................................................. 512
Removing................................................ 507
Storing..................................................... 522
Specications, Capacities............................ 546
Speedometer............................................... 227
Split Bench Seat (60/40)............................... 18
StabiliTrak
®System..................................... 349
StabiliTrak®Indicator Light........................... 235
Starting Your Engine................................... 141
Steering...................................................... 353
Steering Wheel Controls, Audio................... 335
Steering Wheel, Tilt Wheel.......................... 193
Storage Areas
Cargo Management System..................... 182
Center Console Storage Area................... 179
Convenience Net..................................... 180
Cupholder(s)............................................ 178
Glove Box................................................ 178
Instrument Panel Storage Area................. 178
Luggage Carrier....................................... 179
Rear Storage Area................................... 180
Stuck in Sand, Mud, Ice, or Snow............... 390
Sun Visors.................................................. 134
Sunroof....................................................... 185
605