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NOTE:Using “TOW/HAUL” mode or a lower gear
range while operating the vehicle under heavy operating
conditions will improve performance and extend trans-
mission life by reducing excessive shifting and heat build
up. This action will also provide better engine braking.
The automatic transmission fluid and filter should be
changed if you regularly tow a trailer for more than
45 minutes of continuous operation. Refer to “Mainte-
nance Schedule” for the proper maintenance intervals.
NOTE:Check the automatic transmission fluid level
before towing.
Tow/Haul
To reduce potential for automatic transmission overheat-
ing, turn the “TOW/HAUL” feature ON when driving in
hilly areas, or select a lower gear range (using the
Electronic Range Select (ERS) feature) on more severe
grades.
Electronic Speed Control – If Equipped
Do not use in hilly terrain or with heavy loads.
When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
Cooling System
To reduce potential for engine and transmission over-
heating, take the following actions:
City Driving
When stopped for short periods of time, shift the trans-
mission into NEUTRAL and increase engine idle speed.
Highway Driving
Reduce speed.
5
STARTING AND OPERATING 465
Page 473 of 622

Recreational Towing – Two-Wheel Drive Models
DO NOT flat tow this vehicle. Damage to the drivetrain
will result.
Recreational towing (for two-wheel drive models) is
allowed ONLY if the rear wheels are OFF the ground.
This may be accomplished using a tow dolly or vehicle
trailer. If using a tow dolly, follow this procedure:
1. Properly secure the dolly to the tow vehicle, following
the dolly manufacturer’s instructions.
2. Drive the rear wheels onto the tow dolly.
3. Firmly set the parking brake. Place automatic trans-
mission in PARK, manual transmission in gear (not in
Neutral).
4. Properly secure the rear wheels to the dolly, following
the dolly manufacturer’s instructions.
5. Remove the key fob from the ignition switch.6. Install a suitable clamping device, designed for tow-
ing, to secure the front wheels in the straight position.
CAUTION!
•Towing with the rear wheels on the ground will
cause severe transmission damage. Damage from
improper towing is not covered under the New
Vehicle Limited Warranty.
•Do not disconnect the driveshaft because fluid
will leak from the transmission, causing damage
to internal parts.
Recreational Towing – Four-Wheel Drive Models
NOTE:Both the manual shift and electronic shift trans-
fer cases must be shifted into NEUTRAL for recreational
towing. Automatic transmissions must be shifted into
PARK for recreational towing. Manual transmissions
472 STARTING AND OPERATING
Page 474 of 622

must be placed in gear (NOT in NEUTRAL) for recre-
ational towing. Refer to the following for the proper
transfer case NEUTRAL shifting procedure for your
vehicle.
CAUTION!
•Front or rear wheel lifts should not be used.
Internal damage to the transmission or transfer
case will occur if a front or rear wheel lift is used
when recreational towing.
•Tow only in the forward direction. Towing this
vehicle backwards can cause severe damage to the
transfer case.
•Automatic transmissions must be placed in the
PARK position for recreational towing.
•Manual transmissions must be placed in gear (not
in Neutral) for recreational towing.
(Continued)
CAUTION! (Continued)
•Before recreational towing, perform the procedure
outlined under “Shifting Into NEUTRAL” to be
certain that the transfer case is fully in NEUTRAL.
Otherwise, internal damage will result.
•Towing this vehicle in violation of the above
requirements can cause severe transmission and/or
transfer case damage. Damage from improper tow-
ing is not covered under the New Vehicle Limited
Warranty.
•Do not disconnect the rear driveshaft because
fluid will leak from the transfer case, causing
damage to internal parts.
•Do not use a bumper-mounted clamp-on tow bar
on your vehicle. The bumper face bar will be
damaged.
5
STARTING AND OPERATING 473
Page 515 of 622

▫Body Lubrication.................... 529
▫Windshield Wiper Blades............... 530
▫Adding Washer Fluid................. 530
▫Exhaust System..................... 531
▫Cooling System..................... 534
▫Brake System....................... 539
▫Rear Axle And 4X4 Front Driving Axle Fluid
Level............................. 541
▫Transfer Case....................... 542
▫Automatic Transmission............... 543
▫Appearance Care And Protection From
Corrosion.......................... 546
Fuses.............................. 552
▫Totally Integrated Power Module......... 552Vehicle Storage....................... 558
Replacement Bulbs.................... 559
Bulb Replacement..................... 559
▫Dual Or Quad Headlamp/Front Park And
Turn Signal — If Equipped............. 559
▫Fog Lamps......................... 562
▫Rear Tail/Stop, Turn Signal And Backup
Lamps............................ 562
▫Center High-Mounted Stoplamp (CHMSL)
With Cargo Lamp.................... 564
▫Cab Top Clearance Lamps — If Equipped . . . 565
▫Rear Lamp Bar ID Marker (Dual Rear
Wheels) — If Equipped................ 567
▫Side Marker Lamps (Dual Rear Wheels) — If
Equipped.......................... 568
514 MAINTAINING YOUR VEHICLE
Page 517 of 622
ENGINE COMPARTMENT — 3.7L
1 — Air Cleaner Filter 7 — Washer Fluid Reservoir
2 — Automatic Transmission Dipstick (If Equipped) 8 — Power Steering Fluid Reservoir
3 — Engine Oil Dipstick 9 — Engine Oil Fill
4 — Brake Fluid Reservoir 10 — Coolant Pressure Cap
5 — Battery 11 — Engine Coolant Reservoir
6 — Integrated Power Module 516 MAINTAINING YOUR VEHICLE
Page 518 of 622
ENGINE COMPARTMENT — 4.7L
1 — Air Cleaner Filter 7 — Washer Fluid Reservoir
2 — Automatic Transmission Dipstick 8 — Power Steering Fluid Reservoir
3 — Engine Oil Dipstick 9 — Engine Oil Fill
4 — Brake Fluid Reservoir 10 — Coolant Pressure Cap
5 — Battery 11 — Engine Coolant Reservoir
6 — Integrated Power Module
7
MAINTAINING YOUR VEHICLE 517
Page 519 of 622
ENGINE COMPARTMENT — 5.7L
1 — Air Cleaner Filter 7 — Washer Fluid Reservoir
2 — Automatic Transmission Dipstick 8 — Integrated Power Module
3 — Engine Oil Fill 9 — Power Steering Fluid Reservoir
4 — Engine Oil Dipstick 10 — Coolant Pressure Cap
5 — Brake Fluid Reservoir 11 — Engine Coolant Reservoir
6 — Battery 518 MAINTAINING YOUR VEHICLE
Page 524 of 622

CAUTION! (Continued)
•Your vehicle has been built with improved fluids
that protect the performance and durability of
your vehicle and also allow extended maintenance
intervals. Do not use chemical flushes in these
components as the chemicals can damage your
engine, transmission, power steering or air condi-
tioning. Such damage is not covered by the New
Vehicle Limited Warranty. If a flush is needed
because of component malfunction, use only the
specified fluid for the flushing procedure.
Engine Oil
Checking Oil Level
To assure proper lubrication of your vehicle’s engine, the
engine oil must be maintained at the correct level. Check
the oil level at regular intervals, such as every fuel stop.The best time to check the engine oil level is about five
minutes after a fully warmed up engine is shut off.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Always
maintain the oil level within the SAFE zone on the
dipstick. Adding one quart of oil when the reading is at
the bottom of the SAFE zone will result in a reading at the
top of the safe zone on these engines.
CAUTION!
Overfilling or underfilling the crankcase will cause
oil aeration or loss of oil pressure. This could damage
your engine.
Change Engine Oil
The oil change indicator system will remind you that it is
time to take your vehicle in for scheduled maintenance.
Refer to “Maintenance Schedule” for further information.
7
MAINTAINING YOUR VEHICLE 523