height GMC YUKON XL 2007 User Guide

To adjust the vertical aim, do the following:
1. Open the hood. SeeHood Release on
page 435for 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.
476

Tire Sidewall Labeling
Useful information about a tire is molded into the
sidewall. The following illustrations are examples
of a typical P-Metric and a LT-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.(B) TPC Spec (Tire Performance Criteria
Specication):Original equipment tires designed
to GM’s specic tire performance criteria have
a TPC specication code molded onto the sidewall.
GM’s TPC specications meet or exceed all
federal safety guidelines.
(C) DOT (Department of Transportation):The
Department of Transportation (DOT) code indicates
that the tire is in compliance with the U.S.
Department of Transportation Motor Vehicle Safety
Standards.
(D) Tire Identication Number (TIN):The letters
and numbers following DOT code are the Tire
Identication Number (TIN). The TIN shows
the manufacturer and plant code, tire size, and
date the tire was manufactured. The TIN is molded
onto both sides of the tire, although only one
side may have the date of manufacture.
(E) Tire Ply Material:The type of cord and
number of plies in the sidewall and under the tread.
(F) Uniform Tire Quality Grading (UTQG):Tire
manufacturers are required to grade tires
based on three performance factors: treadwear,
traction, and temperature resistance. For more
information, seeUniform Tire Quality Grading on
page 502.
Passenger (P-Metric) Tire
484

(G) Maximum Cold Ination Load
Limit:Maximum load that can be carried and the
maximum pressure needed to support that
load. For information on recommended tire
pressure seeInation - Tire Pressure on page 490
andLoading Your Vehicle on page 390.(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.
(B) TPC Spec (Tire Performance Criteria
Specication):Original equipment tires designed
to GM’s specic tire performance criteria have
a TPC specication code molded onto the sidewall.
GM’s TPC specications meet or exceed all
federal safety guidelines.
(C) Dual Tire Maximum Load:Maximum load
that can be carried and the maximum pressure
needed to support that load when used in a dual
conguration. For information on recommended
tire pressure seeInation - Tire Pressure on
page 490andLoading Your Vehicle on page 390.
(D) DOT (Department of Transportation):The
Department of Transportation (DOT) code
indicates that the tire is in compliance with the
U.S. Department of Transportation Motor Vehicle
Safety Standards.
Light Truck (LT-Metric) Tire
485

(A) Light Truck (LT-Metric) Tire:The United
States version of a metric tire sizing system. The
letters LT as the rst two characters in the tire
size means a light truck 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.
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.
487

{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 508for more
information.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has
been used or how far it has been driven. It
could fail suddenly and cause a crash. If
you have to replace a wheel, use a new
GM original equipment wheel.
505

Remote Keyless Entry System,
Operation.................................................. 113
Removing the Flat Tire and Installing
the Spare Tire........................................... 513
Removing the Spare Tire and Tools............. 509
Replacement Bulbs...................................... 481
Reporting Safety Defects
Canadian Government.............................. 589
General Motors......................................... 589
United States Government........................ 588
Restraint System Check
Checking the Restraint Systems................ 106
Replacing Restraint System Parts
After a Crash........................................ 107
Retained Accessory Power (RAP)................. 138
Right Front Passenger Position,
Safety Belts................................................ 52
Roadside
Assistance Program.................................. 577
Rocking Your Vehicle to Get it Out............... 388
Routing, Engine Drive Belt........................... 567
Running Boards, Power................................ 129
Running the Engine While Parked................ 156S
Safety Belt
Passenger Reminder Light........................ 227
Pretensioners.............................................. 60
Reminder Light......................................... 226
Safety Belts
Care of..................................................... 531
Center Front Passenger Position................. 53
Driver Position............................................ 44
How to Wear Safety Belts Properly............. 43
Questions and Answers About
Safety Belts............................................. 42
Rear Safety Belt Comfort Guides................ 56
Rear Seat Passengers................................ 54
Right Front Passenger Position................... 52
Safety Belt Extender................................... 60
Safety Belt Use During Pregnancy.............. 52
Safety Belts Are for Everyone..................... 38
Shoulder Belt Height Adjuster..................... 51
Safety Warnings and Symbols.......................... 4
Scheduled Maintenance............................... 555
Seats
60/40 Split Bench Seat............................... 20
Bucket Seats, Rear..................................... 26
Center Seat................................................ 19
604

Seats (cont.)
Head Restraints.......................................... 18
Heated Seats.............................................. 12
Heated Seats - Rear.................................. 19
Manual......................................................... 9
Memory, Mirrors, and Pedals...................... 13
Power Lumbar............................................ 11
Power Seats............................................... 10
Reclining Seatbacks.................................... 15
Third Row Seat.......................................... 33
Secondary Latch System.............................. 519
Securing a Child Restraint
Center Front Seat Position.......................... 85
Rear Seat Position...................................... 83
Right Front Seat Position............................ 86
Security Light............................................... 241
Service......................................................... 426
Accessories and Modications................... 426
Adding Equipment to the Outside of
Your Vehicle.......................................... 428
California Proposition 65 Warning............. 427
Doing Your Own Work.............................. 427
Engine Soon Light.................................... 236
Publications Ordering Information.............. 590
Servicing Your Airbag-Equipped Vehicle......... 104
Setting the Time...................................276, 277
Sheet Metal Damage................................... 535Shifting Into Park (P).................................... 152
Shifting Out of Park (P)................................ 154
Shoulder Belt Height Adjuster......................... 51
Signals, Turn and Lane-Change................... 191
Snow Plow................................................... 396
Spare Tire.................................................... 526
Installing................................................... 513
Removing................................................. 509
Storing...................................................... 522
Specications, Capacities............................. 548
Speedometer................................................ 226
Split Bench Seat (60/40)................................ 20
StabiliTrak
®System...................................... 348
StabiliTrak®Indicator Light............................ 234
Starting Your Engine.................................... 138
Steering....................................................... 351
Steering Wheel Controls, Audio.................... 334
Steering Wheel, Tilt Wheel........................... 189
Storage Areas
Cargo Management System...................... 178
Center Console Storage Area................... 175
Cupholder(s)............................................. 174
Glove Box................................................. 174
Luggage Carrier........................................ 175
Rear Seat Armrest.................................... 176
Rear Storage Area.................................... 176
605