
If Your Vehicle is Stuck in Sand,
Mud, Ice, or Snow
Slowly and cautiously spin the wheels to free thevehicle when stuck in sand, mud, ice, or snow. SeeRocking Your Vehicle to Get It Out on page 6!30.
If the vehicle has a traction system, it can often helpto free a stuck vehicle. Refer to the vehicle's tractionsystem in the Index. If stuck too severely for the tractionsystem to free the vehicle, turn the traction system offand use the rocking method.
{WARNING:
If the vehicle's tires spin at high speed, they
can explode, and you or others could be injured.
The vehicle can overheat, causing an engine
compartment fire or other damage. Spin the
wheels as little as possible and avoid going above
55 km/h (35 mph) as shown on the speedometer.
For information about using tire chains on the vehicle,seeTire Chains on page 7!78.
Rocking Your Vehicle to Get It Out
Turn the steering wheel left and right to clear the areaaround the front wheels. Turn off any traction or stabilitysystem. Shift back and forth between R (Reverse) and aforward gear, spinning the wheels as little as possible.To prevent transmission wear, wait until the wheels stopspinning before shifting gears. Release the acceleratorpedal while shifting, and press lightly on the acceleratorpedal when the transmission is in gear. Slowly spinningthe wheels in the forward and reverse directions causesa rocking motion that could free the vehicle. If that doesnot get the vehicle out after a few tries, it might needto be towed out. Recovery hooks can be used, if thevehicle has them. If the vehicle does need to betowed out, seeTowing Your Vehicle on page 6!38.
6-30

Two-wheel-drive vehicles should not be towed withthe rear wheels on the ground. Two-wheel-drivetransmissions have no provisions for internal lubricationwhile being towed.
Dolly Towing (Rear Wheels Off the Ground)
Use the following procedure to dinghy tow atwo-wheel-drive vehicle from the rear:
1. Attach the dolly to the tow vehicle following thedolly manufacturer's instructions.
2. Drive the rear wheels onto the dolly.
3. Firmly set the parking brake. SeeParking Brakeon page 3!38.
4. Put the transmission in P (Park).
5. Secure the vehicle to the dolly following themanufacturer's instructions.
6. Use an adequate clamping device designed fortowing to ensure that the front wheels are lockedinto the straight position.
7. Turn the ignition to LOCK/OFF.
Level Control
Automatic Level Control
The automatic level control rear suspension is availableon light!duty vehicles and comes as a part of theAutoride®suspension, if equipped.
This type of level control is fully automatic and willprovide a better leveled riding position as well as betterhandling under a variety of passenger and loadingconditions. An air compressor connected to the rearshocks will raise or lower the rear of the vehicle tomaintain proper vehicle height. The system is activatedwhen the ignition key is turned to ON/RUN and willautomatically adjust vehicle height thereafter. Thesystem may exhaust (lower vehicle height) for up toten minutes after the ignition key has been turned off.You may hear the air compressor operating when theheight is being adjusted.
6-41

Tow/Haul Mode
Pressing this button at the end of the shift lever turns onand off the tow/haul mode.
This indicator light on theinstrument panel clustercomes on when thetow/haul mode is on.
Tow/Haul is a feature that assists when pulling a heavytrailer or a large or heavy load. SeeTow/Haul Modeonpage 3!36for more information.
Tow/Haul is designed to be most effective when thevehicle and trailer combined weight is at least75 percent of the vehicle's Gross Combined WeightRating (GCWR). See“Weight of the Trailer”earlier inthe section. Tow/Haul is most useful under the followingdriving conditions:
.When pulling a heavy trailer or a large or heavyload through rolling terrain.
.When pulling a heavy trailer or a large or heavyload in stop and go traffic.
.When pulling a heavy trailer or a large or heavyload in busy parking lots where improved lowspeed control of the vehicle is desired.
Operating the vehicle in Tow/Haul when lightly loadedor with no trailer at all will not cause damage. However,there is no benefit to the selection of Tow/Haul when thevehicle is unloaded. Such a selection when unloadedmay result in unpleasant engine and transmissiondriving characteristics and reduced fuel economy.Tow/Haul is recommended only when pulling a heavytrailer or a large or heavy load.
6-49

Trailer Wiring Harness
Heavy-Duty Trailer Wiring Harness Package
The vehicle has a seven-pin universal heavy-duty trailerconnector attached to the rear bumper beam next to theintegrated trailer hitch.
The seven-wire harness contains the followingtrailer circuits:
.Yellow: Left Stop/Turn Signal
.Dark Green: Right Stop/Turn Signal
.Brown: Taillamps
.White: Ground
.Light Green: Back-up Lamps
.Red: Battery Feed*
.Dark Blue: Trailer Brake*
*The fuses for these two circuits are installed in theunderhood electrical center, but the wires are notconnected. They should be connected by yourdealer/retailer or a qualified service center.
If charging a remote (non-vehicle) battery, press thetow/haul mode button located at the end of the shiftlever. This will boost the vehicle system voltage andproperly charge the battery. If the trailer is too light fortow/haul mode, turn on the headlamps as a second wayto boost the vehicle system and charge the battery.
6-54

Electric Brake Control Wiring
Provisions
These wiring provisions are included with the vehicle aspart of the trailer wiring package. These provisions arefor an electric brake controller. The instrument panelcontains blunt cut wires near the data link connector forthe trailer brake controller. The harness contains thefollowing wires:
.Dark Blue: Brake Signal to Trailer Connector
.Red/Black: Battery
.Light Blue/White: Brake Switch
.White: Ground
It should be installed by your dealer/retailer or aqualified service center.
Trailer Recommendations
Subtract the hitch loads from the Cargo Weight Rating(CWR). CWR is the maximum weight of the load thevehicle can carry. It does not include the weight of thepeople inside, but you can figure about 150 lbs. (68 kg)for each passenger. The total cargo load must not bemore than the vehicles CWR.
Weigh the vehicle with the trailer attached, so theGVWR or GAWR are not exceeded. If using aweight-distributing hitch, weigh the vehicle without thespring bars in place.
The best performance is obtained by correctlyspreading out the weight of the load and choosing thecorrect hitch and trailer brakes.
For more information seeTowing a Traileronpage 6!42.
6-55

Section 7 Service and Appearance Care
Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4Accessories and Modifications . . . . . . . . . . . . . . . . . . 7-4California Proposition 65 Warning . . . . . . . . . . . . . . . 7-5California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5Doing Your Own Service Work . . . . . . . . . . . . . . . . . . 7-6Adding Equipment to the Outside of theVehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7Gasoline Octane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8Gasoline Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 7-8California Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9Fuel E85 (85% Ethanol) . . . . . . . . . . . . . . . . . . . . . . . . . 7-9Fuels in Foreign Countries . . . . . . . . . . . . . . . . . . . . . 7-10Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11Filling a Portable Fuel Container . . . . . . . . . . . . . . . 7-13
Checking Things Under the Hood. . . . . . . . . . . . . . . 7-14Hood Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15Engine Compartment Overview . . . . . . . . . . . . . . . . 7-16Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17Engine Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 7-20Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . . 7-22
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . 7-24Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28Engine Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29Engine Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-34Overheated Engine ProtectionOperating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-37Engine Fan Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-37Power Steering Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 7-38Windshield Washer Fluid . . . . . . . . . . . . . . . . . . . . . . 7-39Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-40Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-43Jump Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-44
All-Wheel Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-49
Rear Axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-50
Front Axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-51
Headlamp Aiming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-52
Bulb Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-54High Intensity Discharge (HID) Lighting . . . . . . . . 7-54LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-55Back-Up Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-55License Plate Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-56Replacement Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-56
7-1

Gasoline Octane
If the vehicle has the 6.0L V8 engine (VIN Code J), useregular unleaded gasoline with a posted octane ratingof 87 or higher. If the octane rating is less than 87, anaudible knocking noise, commonly referred to as sparkknock, might be heard when driving. If this occurs, usea gasoline rated at 87 octane or higher as soon aspossible. If heavy knocking is heard when usinggasoline rated at 87 octane or higher, the engineneeds service.
If the vehicle has the 6.2L V8 engine (VIN Code F), usepremium unleaded gasoline with a posted octane ratingof 91 or higher. You can also use regular unleadedgasoline rated at 87 octane or higher, but the vehicle'sacceleration could be slightly reduced, and a slightaudible knocking noise, commonly referred to as sparkknock, might be heard. If the octane is less than 87, youmight notice a heavy knocking noise when you drive.If this occurs, use a gasoline rated at 87 octane orhigher as soon as possible. Otherwise, you coulddamage the engine. If heavy knocking is heard whenusing gasoline rated at 87 octane or higher, the engineneeds service.
Gasoline Specifications
At a minimum, gasoline should meet ASTMspecification D 4814 in the United States orCAN/CGSB!3.5 or 3.511 in Canada. Some gasolinescontain an octane-enhancing additive calledmethylcyclopentadienyl manganese tricarbonyl (MMT).We recommend against the use of gasolines containingMMT. SeeAdditiveso n p a g e 7!9for additionalinformation.
California Fuel
If the vehicle is certified to meet California EmissionsStandards, it is designed to operate on fuels that meetCalifornia specifications. See the underhood emissioncontrol label. If this fuel is not available in statesadopting California emissions standards, the vehiclewill operate satisfactorily on fuels meeting federalspecifications, but emission control system performancemight be affected. The malfunction indicator lamp couldturn on and the vehicle might fail a smog!check test.SeeMalfunction Indicator Lampon page 4!36. If thisoccurs, return to your authorized dealer/retailer fordiagnosis. If it is determined that the condition is causedby the type of fuel used, repairs might not be coveredby the vehicle warranty.
7-8

If the vehicle has a Driver Information Center (DIC), theTIGHTEN GAS CAP message displays if the fuel cap isnot properly installed.
{WARNING:
If a fire starts while you are refueling, do not
remove the nozzle. Shut off the flow of fuel by
shutting off the pump or by notifying the station
attendant. Leave the area immediately.
Notice:If you need a new fuel cap, be sure to getthe right type. Your dealer/retailer can get one foryou. If you get the wrong type, it may not fitproperly. This may cause the malfunction indicatorlamp to light and may damage the fuel tank andemissions system. SeeMalfunction Indicator Lampon page 4!36.
Filling a Portable Fuel Container
{WARNING:
Never fill a portable fuel container while it is in
the vehicle. Static electricity discharge from the
container can ignite the fuel vapor. You can be
badly burned and the vehicle damaged if this
occurs. To help avoid injury to you and others:
.Dispense fuel only into approved containers.
.Do not fill a container while it is inside a
vehicle, in a vehicle's trunk, pickup bed,
or on any surface other than the ground.
.Bring the fill nozzle in contact with the inside
of the fill opening before operating the nozzle.
Contact should be maintained until the filling
is complete.
.Do not smoke while pumping fuel.
.Do not use a cellular phone while
pumping fuel.
7-13