
•If your vehicle is not equipped with a matching
full-size spare wheel and tire assembly, it does not
have a tire pressure monitoring sensor in the spare tire.
The TPMS will not be able to monitor the tire pressure.
If you install the spare tire in place of a road tire that
has a pressure below the low-pressure warning limit,
upon the next ignition switch cycle, the “Tire Pressure
Monitoring Telltale Light” will remain ON, a chime
will sound, and the EVIC will still display the Inflate
to XX message and a “flashing” pressure value in the
graphic display. After driving the vehicle for up to 10
minutes above 15 mph (24 km/h), the “Tire Pressure
Monitoring Telltale Light” will flash on and off for 75
seconds and then remain on solid. In addition, the
EVIC will display a “SERVICE TPM SYSTEM mes-
sage for a minimum of five seconds and then display
dashes (- -) in place of the pressure value. For each
subsequent ignition switch cycle, a chime will sound,
the “Tire Pressure Monitoring Telltale Light” will flash on and off for 75 seconds and then remain on solid,
and the EVIC will display a
SERVICE TPM SYSTEM
message for a minimum of five seconds and then
display dashes (- -) in place of the pressure value.
• Once you repair or replace the original road tire, and
reinstall it on the vehicle in place of the spare tire, the
TPMS will update automatically.
In addition, the “Tire Pressure Monitoring Telltale Light”
will turn OFF and the graphic in the EVIC will display a
new pressure value instead of dashes (- -), as long as no
tire pressure is below the low-pressure warning limit in
any of the four active road tires. The vehicle may need to
be driven for up to 10 minutes above 15 mph (24 km/h)
in order for the TPMS to receive this information.
5
STARTING AND OPERATING 533

rear axle systems (GAWR). Total load must be limited so
GVWR and front and rear GAWR are not exceeded.
Payload
The payload of a vehicle is defined as the allowable load
weight a truck can carry, including the weight of the
driver, all passengers, options and cargo.
Gross Axle Weight Rating (GAWR)
The GAWR is the maximum permissible load on the front
and rear axles. The load must be distributed in the cargo
area so that the GAWR of each axle is not exceeded.
Each axle GAWR is determined by the components in the
system with the lowest load carrying capacity (axle,
springs, tires or wheels). Heavier axles or suspension
components sometimes specified by purchasers for in-
creased durability does not necessarily increase the vehi-
cle’s GVWR.
Tire Size
The tire size on the Vehicle Certification Label represents
the actual tire size on your vehicle. Replacement tires
must be equal to the load capacity of this tire size.
Rim Size
This is the rim size that is appropriate for the tire size
listed.
Inflation Pressure
This is the cold tire inflation pressure for your vehicle for
all loading conditions up to full GAWR.
Curb Weight
The curb weight of a vehicle is defined as the total weight
of the vehicle with all fluids, including vehicle fuel, at full
capacity conditions, and with no occupants or cargo
loaded into the vehicle. The front and rear curb weight
542 STARTING AND OPERATING

Towing Requirements — Tires
•Proper tire inflation pressures are essential to the safe
and satisfactory operation of your vehicle. Refer to
“Tires – General Information” in “Starting And Oper-
ating” for proper tire inflation procedures.
• Check the trailer tires for proper tire inflation pres-
sures before trailer usage.
• Check for signs of tire wear or visible tire damage
before towing a trailer. Refer to “Tires – General
Information” in “Starting And Operating” for proper
inspection procedure.
• When replacing tires, refer to “Tires – General Infor-
mation” in “Starting And Operating” for proper tire
replacement procedures. Replacing tires with a higher
load carrying capacity will not increase the vehicle’s
GVWR and GAWR limits.
Towing Requirements — Trailer Brakes
• Do not interconnect the hydraulic brake system or
vacuum system of your vehicle with that of the trailer.
This could cause inadequate braking and possible
personal injury.
• An electronically actuated trailer brake controller is
required when towing a trailer with electronically
actuated brakes. When towing a trailer equipped with
a hydraulic surge actuated brake system, an electronic
brake controller is not required.
• Trailer brakes are recommended for trailers over
1,000 lbs (453 kg) and required for trailers in excess of
2,000 lbs (907 kg).
558 STARTING AND OPERATING

WARNING!(Continued)
•Do not let anyone sit in the vehicle when it is on a
jack.
• Do not get under the vehicle when it is on a jack. If
you need to get under a raised vehicle, take it to a
service center where it can be raised on a lift.
• Only use the jack in the positions indicated and for
lifting this vehicle during a tire change.
• If working on or near a roadway, be extremely
careful of motor traffic.
• To assure that spare tires, flat or inflated, are
securely stowed, spares must be stowed with the
valve stem facing the ground.
CAUTION!
Do not attempt to raise the vehicle by jacking on
locations other than those indicated in the Jacking
Instructions for this vehicle.
1. Remove the spare tire, jack and tools from the stored location.
Jack Warning Label
6
WHAT TO DO IN EMERGENCIES 577

NOTE:Under no circumstances should oil change inter-
vals exceed 10,000 miles (16,000 km), twelve months or
350 hours of engine run time, whichever comes first. The
350 hours of engine run or idle time is generally only a
concern for fleet customers.
Severe Duty All Models
Change Engine Oil at 4,000 miles (6,500 km) if the vehicle
is operated in a dusty and off road environment or is
operated predominately at idle or only very low engine
RPM’s. This type of vehicle use is considered Severe
Duty. Once A Month Or Before A Long Trip:
•
Check engine oil level
• Check windshield washer fluid level
• Check the tire inflation pressures and look for unusual
wear or damage
• Check the fluid levels of the coolant reservoir, brake
master cylinder, power steering and automatic trans-
mission, and fill as needed
• Check function of all interior and exterior lights
8
MAINTENANCE SCHEDULES 665

WARNING!
The traction grade assigned to this tire is based on
straight-ahead braking traction tests, and does not
include acceleration, cornering, hydroplaning, or
peak traction characteristics.
Temperature Grades
The temperature grades are A (the highest), B, and C,
representing the tire’s resistance to the generation of heat
and its ability to dissipate heat, when tested under
controlled conditions on a specified indoor laboratory
test wheel. Sustained high temperature can cause the
material of the tire to degenerate and reduce tire life, andexcessive temperature can lead to sudden tire failure. The
grade C corresponds to a level of performance, which all
passenger vehicle tires must meet under the Federal
Motor Vehicle Safety Standard No. 109. Grades B and A
represent higher levels of performance on the laboratory
test wheel, than the minimum required by law.
WARNING!
The temperature grade for this tire is established for
a tire that is properly inflated and not overloaded.
Excessive speed, under-inflation, or excessive load-
ing, either separately or in combination, can cause
heat buildup and possible tire failure.
680 IF YOU NEED CONSUMER ASSISTANCE

Caps, FillerFuel ................................ .539
Power Steering ........................ .477
Radiator (Coolant Pressure) ................628
Carbon Monoxide Warning ...............100, 538
Cargo Light ............................ .174
Car Washes ............................ .639
Cellular Phone ...........................115
Center High Mounted Stop Light ..............658
Certification Label ........................ .541
Chains, Tire ............................ .521
Changing A Flat Tire ...................... .573
Chart, Tire Sizing ........................ .500
Check Engine Light (Malfunction Indicator Light) . .597
Checking Your Vehicle For Safety ...............99
Checks, Safety ............................99
Child Restraint ............................75
Child Restraints Booster Seats ...........................79 Child Restraints
.........................75
Child Seat Installation .....................94
How To Stow An Unused ALR Seat Belt ........90
Infants And Child Restraints ................77
Install A LATCH-Compatible Child Restraint ....89
Installing Child Restraints Using The Vehicle Seat
Belt ..................................91
Locating The LATCH Anchorages ............86
Lower Anchors And Tethers For Children .......82
Older Children And Child Restraints ..........78
Seating Positions ........................81
Child Safety Locks .........................42
Clean Air Gasoline ....................... .535
Cleaning Wheels .............................. .641
Climate Control ......................... .415
Clock .......................... .359, 368, 385
Cold Weather Operation ....................435
Compact Disc (CD) Maintenance ..............412
684 INDEX

Sway Control, Trailer...................... .496
Swing Gate, Rear ..........................46
Synthetic Engine Oil ...................... .602
System, Remote Starting .....................28
Temperature Control, Automatic (ATC) ..........419
Tilt Steering Column ...................... .180
Tip Start ............................... .435
Tire And Loading Information Placard .......505, 506
Tire Markings ........................... .499
Tires ....................... .103, 509, 515, 679
Aging (Life Of Tires) .....................519
Air Pressure .......................... .509
Chains .............................. .521
Changing ............................ .573
Compact Spare ........................ .516
General Information ..................509, 515
High Speed .......................... .512
Inflation Pressures ...................... .510Jacking
.......................... .573, 578
Life Of Tires .......................... .519
Load Capacity ..................... .505, 506
Pressure Monitor System (TPMS) ............523
Pressure Warning Light ...................328
Quality Grading ....................... .679
Radial .............................. .512
Replacement .......................... .519
Rotation ............................. .522
Safety ........................... .499, 509
Sizes ............................... .500
Snow Tires ........................... .514
Spare Tire ...................515, 516, 517, 575
Spinning ............................ .517
Tread Wear Indicators ....................518
Tire Safety Information .....................499
Tongue Weight/Trailer Weight ................555
T
o Open Hood .......................... .167
Tow Hooks, Emergency .....................586
698 INDEX