2010 JEEP GRAND CHEROKEE Owners Manual

When stopped in heavy traffic, it may be necessary to
shift into NEUTRAL and press the accelerator slightly for
fast idle operation to increase coolant flow and fan speed.
Your air conditioning system is also equipped with an
automatic recirculation system. When the system senses
a heavy load or high heat conditions, it may use partial
Recirculation A/C mode to provide additional comfort.
Winter Operation
When operating the system during the winter months,
make sure the air intake, located directly in front of the
windshield, is free of ice, slush, snow, or other
obstructions.
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e. vacation) for two weeks or more, run the air condi-
tioning system at idle for about five minutes in the fresh
air and high blower setting. This will ensure adequate
system lubrication to minimize the possibility of com-
pressor damage when the system is started again.
232 UNDERSTANDING YOUR INSTRUMENT PANEL

Operating Tips Chart
4
UNDERSTANDING YOUR INSTRUMENT PANEL 233

STARTING AND OPERATING
CONTENTS
Starting Procedures .................... 240
▫ Normal Starting ..................... 240
▫ Extreme Cold Weather
(Below 20°F Or 29°C)............... 241
▫ If Engine Fails To Start ................ 241
▫ After Starting ....................... 242
 Engine Block Heater — If Equipped ........ 242
 Automatic Transmission ................. 243
▫ Key Ignition Park Interlock ............. 243▫
Brake/Transmission Shift Interlock System . . 244
▫ Brake/Transmission Interlock Manual
Override .......................... 244
▫ Five–Speed Automatic Transmission ....... 245
▫ Gear Ranges ........................ 245
▫ Rocking The Vehicle .................. 252
 Four-Wheel Drive Operation ............. 253
▫ Quadra-Trac I Operating Instructions/
Precautions – If Equipped .............. 253
5

▫Quadra-Trac II Operating Instructions/
Precautions – If Equipped .............. 253
▫ Shift Positions ...................... 255
▫ Shifting Procedures ................... 255
▫ Quadra-Drive II System – If Equipped .... 258
 On-Road Driving Tips .................. 258
 Off-Road Driving Tips .................. 259
▫ When To Use 4WD Low Range –
If Equipped ........................ 259
▫ Driving Through Water ................ 259
▫ Driving In Snow, Mud And Sand ......... 260
▫ Hill Climbing ....................... 261
▫ Traction Downhill .................... 262
▫ After Driving Off-Road ................ 262 
Power Steering ....................... 263
▫ Power Steering Fluid Check ............. 264
 Multi-Displacement System (MDS)
(If Equipped) – 5.7L Engine Only ........... 265
 Parking Brake ........................ 265
 Anti-Lock Brake System ................. 268
 Electronic Brake Control System ........... 270
▫ Anti-Lock Brake System (ABS) ........... 270
▫ Traction Control System (TCS) ........... 271
▫ Brake Assist System (BAS) .............. 271
▫ Electronic Roll Mitigation (ERM) ......... 272
▫ Electronic Stability Program (ESP) ........ 273
▫ Trailer Sway Control (TSC) ............. 278
236 STARTING AND OPERATING

▫Hill Start Assist (HSA) – Four-Wheel Drive
Models With NV245 Two–Speed Transfer
Case Only ......................... 278
▫ Hill Descent Control (HDC) – Four-Wheel
Drive Models With NV245 Two–Speed
Transfer Case Only ................... 281
▫ ESP/BAS Warning Light And ESP/TCS
Indicator Light ...................... 283
 Tire Safety Information ................. 284
▫ Tire Markings ....................... 284
▫ Tire Identification Number (TIN) ......... 288
▫ Tire Terminology And Definitions ......... 289
▫ Tire Loading And Tire Pressure .......... 291
 Tires — General Information ............. 295
▫ Tire Pressure ....................... 295 ▫
Tire Inflation Pressures ................ 296
▫ Tire Pressures For High Speed Operation . . . 298
▫ Radial-Ply Tires ..................... 298
▫ Compact Spare Tire – If Equipped ........ 298
▫ Tire Spinning ....................... 299
▫ Tread Wear Indicators ................. 300
▫ Life Of Tire ........................ 301
▫ Replacement Tires .................... 301
 Tire Chains .......................... 302
 Tire Rotation Recommendations ........... 303
 Tire Pressure Monitor System (TPMS) ....... 304
▫ Base System ........................ 307
▫ Premium System – If Equipped .......... 309
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STARTING AND OPERATING 237

▫General Information .................. 314
 Fuel Requirements ..................... 315
▫ 3.7 Engine ......................... 315
▫ 5.7L Engine ........................ 315
▫ Reformulated Gasoline ................ 316
▫ Gasoline/Oxygenate Blends ............. 316
▫ E-85 Usage In Non-Flex Fuel Vehicles ...... 316
▫ MMT In Gasoline .................... 317
▫ Materials Added To Fuel ............... 318
▫ Fuel System Cautions ................. 318
▫ Carbon Monoxide Warnings ............ 319
 Adding Fuel ......................... 320
▫ Fuel Filler Cap (Gas Cap) .............. 320 ▫
Loose Fuel Filler Cap Message ........... 321
 Vehicle Loading ...................... 322
▫ Certification Label ................... 322
 Trailer Towing ........................ 324
▫ Common Towing Definitions ............ 324
▫ Trailer Hitch Classification .............. 328
▫ Trailer Towing Weights
(Maximum Trailer Weight Ratings) ........ 330
▫ Trailer And Trailer Tongue Weight ........ 331
▫ Towing Requirements ................. 332
▫ Towing Tips ........................ 337
 Snow Plow .......................... 338
 Recreational Towing
(Behind Motorhome, Etc.) ................ 338
238 STARTING AND OPERATING

▫Towing – Two-Wheel Drive Models ....... 338
▫ Towing — Quadra-Trac I (Single-Speed
Transfer Case) Four-Wheel Drive Models . . . 339 ▫
Towing — Quadra–Trac II /Quadra–Drive
II Four-Wheel Drive Models ............. 339
5
STARTING AND OPERATING 239