2010 JEEP GRAND CHEROKEE tires

WARNING! (Continued)
•Safety chains must always be used between your
vehicle and trailer. Always connect the chains to
the hook retainers of the vehicle hitch. Cross the
chains under the trailer tongue and allow enough
slack for turning corners.
•Vehicles with trailers should not be parked on a
grade. When parking, apply the parking brake on
the tow vehicle. Put the tow vehicle transmission
in PARK. Always, block orchockthe trailer
wheels.
•GCWR must not be exceeded.
•Total weight must be distributed between the tow
vehicle and the trailer such that the following four
ratings are not exceeded:
1. GVWR
2. GTW
(Continued)
WARNING! (Continued)
3. GAWR
4. Tongue weight rating for the trailer hitch utilized
(This requirement may limit the ability to always
achieve the 10% to 15% range of tongue weight as a
percentage of total trailer weight).
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.
296 STARTING AND OPERATING

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

Donot 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 (454 kg) and required for trailers in excess of
2,000 lbs (907 kg).
CAUTION!
If the trailer weighs more than 1,000 lbs (454 kg)
loaded, it should have its own brakes and they
should be of adequate capacity. Failure to do this
could lead to accelerated brake lining wear, higher
brake pedal effort, and longer stopping distances.
5
STARTING AND OPERATING 297

WHAT TO DO IN EMERGENCIES
CONTENTS
Hazard Warning Flashers ................ 302
 If Your Engine Overheats ................ 302
 Jacking And Tire Changing ............... 304
▫ Run Flat Tires ....................... 304
 Jump-Starting Procedures ................ 304 ▫
Preparations For Jump-Start ............. 305
▫ Jump-Starting Procedure ............... 306
 Emergency Tow Hooks — If Equipped ...... 308
 Towing A Disabled Vehicle ............... 309
6

JACKING AND TIRE CHANGING
Run Flat Tires
This vehicle is equipped with run flat tires. Although the
tires are designed with a “run flat” feature that allows the
vehicle to be driven approximately 50 miles (80 km) at
55 mph (88 km/h). immediate service should be ob-
tained.
WARNING!
Do not exceed 50 mph (80 km/h) if the “Tire Pressure
Monitoring Telltale Light” is illuminated. Vehicle
handling and braking may be reduced. You could
have an accident and be severely or fatally injured.
NOTE: The “run flat” feature eliminates the need for a
spare tire and jack. This vehicle is not equipped with
either a spare tire or jack.
JUMP-STARTING PROCEDURES
If your vehicle has a discharged battery it can be jump-
started using a set of jumper cables and a battery in
another vehicle or by using a portable battery booster
pack. Jump-starting can be dangerous if done improperly
so please follow the procedures in this section carefully.
NOTE: When using a portable battery booster pack
follow the manufacturer ’s operating instructions and
precautions.
CAUTION!
Do not use a portable battery booster pack or any
other booster source with a system voltage greater
than 12 Volts or damage to the battery, starter motor,
alternator or electrical system may occur.
304 WHAT TO DO IN EMERGENCIES

DEPARTMENT OF TRANSPORTATION UNIFORM
TIRE QUALITY GRADES
The following tire grading categories were established by
the National Highway Traffic Safety Administration. The
specific grade rating assigned by the tire’s manufacturer
in each category is shown on the sidewall of the tires on
your vehicle.
All passenger car tires must conform to Federal safety
requirements in addition to these grades.
Treadwear
The Treadwear grade is a comparative rating, based on
the wear rate of the tire when tested under controlled
conditions on a specified government test course. For
example, a tire graded 150 would wear one and one-half
times as well on the government course as a tire graded
100. The relative performance of tires depends upon the
actual conditions of their use, however, and may departsignificantly from the norm due to variations in driving
habits, service practices, and differences in road charac-
teristics and climate.
Traction Grades
The Traction grades, from highest to lowest, are AA, A, B,
and C. These grades represent the tire’s ability to stop on
wet pavement, as measured under controlled conditions
on specified government test surfaces of asphalt and
concrete. A tire marked C may have poor traction perfor-
mance.
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.
9
IF YOU NEED CONSUMER ASSISTANCE 385

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, and
excessive temperature can lead to sudden tire failure. The
grade C corresponds to a level of performance, which all
passenger car tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades B and A repre-
sent 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.
386 IF YOU NEED CONSUMER ASSISTANCE

ABS (Anti-Lock Brake System)............159,252
Adding Engine Coolant (Antifreeze) .......... 330
Adding Fuel ........................... 287
Additives, Fuel ......................... 285
Adjustable Pedals ........................ 114
Air Conditioner Maintenance ............... 322
Air Conditioning, Operating Tips ............ 232
Air Conditioning Refrigerant ............... 323
Air Pressure, Tires ....................... 274
Airbag .............................. 45,54
Airbag Deployment ....................... 55
Airbag Light ................... 46,53,58,73,159
Airbag Maintenance ....................... 57
Airbag, Side .......................... 51,54
Airbag, Window (Side Curtain) ...........48,51,54
Alarm, Panic ............................ 22
Alarm (Security Alarm) .................17,159
Alterations/Modifications, Vehicle ............. 8
Antenna, Satellite Radio ................... 216 Antifreeze (Engine Coolant)
..............329,355
Disposal ............................ 332
Anti-Lock Brake System (ABS) ............252,255
Anti-Lock Warning Light .................. 159
Anti-Theft System ....................... 159
Appearance Care ........................ 336
Arming Theft System (Security Alarm) ......... 17
Auto Down Power Windows ................ 30
Automatic Dimming Mirror ................. 80
Automatic Door Locks ..................... 28
Automatic Headlights .................... 101
Automatic Temperature Control (ATC) ......... 225
Automatic Transmission ................242,335
Fluid Level Check ..................... 335
Autostick ............................. 245
Auxiliary Electrical Outlet (Power Outlet) ...... 137
Auxiliary Power Outlet ................... 137
Battery ............................... 322
388 INDEX

Gear Ranges........................... 243
General Information .................. 17,23,282
Glass Cleaning .......................... 340
Gross Axle Weight Rating .................. 290
Gross Vehicle Weight Rating ................ 289
Hands-Free Phone (Uconnect™) .............. 83
Hazard Warning Flasher ................... 302
Head Restraints .......................... 87
Head Rests ............................. 87
Headlights .......................... 100,349
Bulb Replacement ...................... 350
On With Wipers ....................... 101
Replacing ........................... 350
Heated Mirrors .......................... 82
Heated Seats .......................... 88,90
High Beam Indicator ..................... 157
High Beam/Low Beam Select (Dimmer) Switch . . 106 Hitches
Trailer Towing ........................ 292
Holder, Cup ........................... 143
HomeLink (Garage Door Opener) Transmitter . . . 128
Hood Release ........................... 98
Ignition ............................... 13
Key ............................... 12,13
Ignition Key Removal ..................... 13
Illuminated Entry ........................ 18
Immobilizer (Sentry Key) ................... 15
Infant Restraint ........................ 60,61
Inflation Pressure Tires .................... 274
Information Center, Vehicle ................. 166
Instrument Cluster .................... 155,156
Instrument Panel and Controls .............. 154
Instrument Panel Lens Cleaning ............. 340
Integrated Power Module (Fuses) ............ 346
Interior Appearance Care .................. 339
394 INDEX