Keep a record for at least one month andrecord the type of driving (city or highway).This provides an accurate estimate of yourvehicle's fuel economy under currentdriving conditions. Keeping records duringsummer and winter will show howtemperature impacts fuel economy.
Conditions
•Heavily loading your vehicle reducesfuel economy.
•Carrying unnecessary weight in yourvehicle may reduce fuel economy.
•Adding certain accessories to yourvehicle such as bug deflectors, rollbarsor light bars, running boards and skiracks may reduce fuel economy.
•Using fuel blended with alcohol maylower fuel economy.
•Fuel economy may decrease with lowertemperatures.
•Fuel economy may decrease whendriving short distances.
•You will get better fuel economy whendriving on flat terrain than when drivingon hilly terrain.
FUEL TANK SELECTOR
SWITCH (IF EQUIPPED)
Your vehicle may have two fuel tanks. Thefuel in each fuel tank is independentlyused. Use the switch on the instrumentpanel to select the left-hand or right-handfuel tank. The fuel gauge indicates theremaining fuel in the selected fuel tank.See Gauges (page 64).
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STEERING
Hydraulic Power Steering
To help prevent damage to the powersteering system:
•Do not hold the steering wheel at itsfurthest turning points for more thanthree to five seconds when the engineis running.
•Avoid continuously steering back andforth with elevated engine RPM as thismay overheat the system. If trying tofree a stuck vehicle, pause betweenattempts to allow the power steeringsystem to cool or seek assistance.Typical steering and driving maneuversallow the system to cool.
•Do not operate the vehicle if the powersteering pump fluid level is below theMIN mark on the reservoir.
•Some noise is normal during operation.If excessive, check for low powersteering pump fluid level beforeseeking service by your dealer.
•Heavy or uneven efforts may be causedby low power steering fluid. Check forlow power steering pump fluid levelbefore seeking service by your dealer.
•Do not fill the power steering pumpreservoir above the MAX mark on thereservoir, as this may result in leaksfrom the reservoir.
If the power steering system breaks downor if you switch the engine off, you cansteer the vehicle manually, but it takesmore effort.
If you have any steering componentsserviced or replaced, install new fasteners.Many fasteners have coatings with threadadhesive, or have prevailing torquefeatures you cannot reuse. Do not reuse abolt or nut. Torque fasteners tospecifications.
Steering Tips
If the steering wanders or pulls, check for:
•An improperly inflated tire.
•Uneven tire wear.
•Loose or worn suspensioncomponents.
•Loose or worn steering components.
•Improper vehicle alignment.
Note:A high crown in the road or highcrosswinds may also make the steeringseem to wander or pull.
PRE-COLLISION ASSIST -
VEHICLES WITH: AIR BRAKES
WARNING: You are responsible forcontrolling your vehicle at all times. Thesystem is designed to be an aid and doesnot relieve you of your responsibility todrive with due care and attention. Failureto follow this instruction could result inthe loss of control of your vehicle,personal injury or death.
WARNING: The system does notdetect vehicles that are driving in adifferent direction, pedestrians, cyclistsor animals. Apply the brakes whennecessary. Failure to follow thisinstruction could result in the loss ofcontrol of your vehicle, personal injury ordeath.
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ECONOMICAL DRIVING
Your fuel economy is affected by severalthings, such as how you drive, theconditions you drive under, and how youmaintain your vehicle.
You may improve your fuel economy bykeeping these things in mind:
•Accelerate and slow down in a smooth,moderate fashion.
•Drive at steady speeds withoutstopping.
•Anticipate stops; slowing down mayeliminate the need to stop.
•Close the windows for high-speeddriving.
•Drive at reasonable speeds. Travelingat 55 mph (90 km/h) uses 15% lessfuel than traveling at 65 mph(105 km/h).
•Keep the tires properly inflated and useonly the recommended size.
•Use the recommended engine oil.
•Perform all regularly scheduledmaintenance.
Avoid these actions; they reduce your fueleconomy:
•Sudden accelerations or hardaccelerations.
•Warm up your vehicle on coldmornings.
•Use the air conditioner.
•Use the speed control in hilly terrain.
•Rest your foot on the brake pedal whiledriving.
•Carry unnecessary weight.Approximately 1 mpg [0.4 km/L] is lostfor every 400 lb (180 kg) of weightcarried.
•Driving with the wheels out ofalignment.
Conditions
•Adding certain accessories to yourvehicle may reduce fuel economy. Forexample bug deflectors, rollbars, lightbars, running boards, ski racks orluggage racks.
•Using fuel blended with alcohol maylower fuel economy.
•Fuel economy may decrease with lowertemperatures during the first 5–10 mi(12–16 km) of driving.
•Driving on flat terrain offers improvedfuel economy as compared to drivingon hilly terrain.
•Transmissions give their best fueleconomy when operated in the topcruise gear and with steady pressureon the gas pedal.
COLD WEATHER
PRECAUTIONS - 6.7L DIESEL
Winter Grille Cover (If Equipped)
The winter grille cover enhances heaterperformance and will reduce the amountof time it takes to warm the inside of yourvehicle in extremely cold conditions below-0.4°F (-18°C).
The winter grille cover installs over theoutside of the front grille and restricts theair flowing to the engine compartment bycovering the radiator grille openings.
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Note:Some spare tires operate ata higher inflation pressure than theother tires. For T type mini-sparetires, see the Dissimilar spare wheeland tire assembly information fora description. Store and maintainat 60 psi (412 kPa). For full-sizeand dissimilar spare tires, see theDissimilar spare wheel and tireassembly information for adescription. Store and maintain atthe higher of the front and rearinflation pressure as shown on theSafety Compliance CertificationLabel or Tire Label.
6.Visually inspect the tires tomake sure there are no nails orother objects embedded thatcould poke a hole in the tireand cause an air leak.
7.Check the sidewalls to makesure there are no gouges, cutsor bulges.
Checking Pressure when tiresare hot:
If pressures are checked after tireshave been driven for more thanthree minutes or more than 1 mile,(2 km) the tires become hot andthe pressures will increase byapproximately 4 psi (27.6 kPa).Therefore when the tire pressureis adjusted under these conditions,it should be increased to a gaugereading of 4 psi (27.6 kPa) greaterthan the recommended coldinflation pressure.
For Example Only
33 psi (230kPa)Gauge readingof hot tire
32 psi (220kPa)If recom-mended, coldinflation pres-sure is
The hot tire pressure is only 1 psi(10 kPa) greater than therecommended cold inflationpressure. Therefore, add 3 psi(20 kPa) more to increase thehot pressure to 4 psi (30 kPa)over the recommended coldinflation pressure.
36 psi (250kPa)New hot pres-sure
Tire Inflation Information
WARNING: An inflated tireand rim can be very dangerousif improperly used, serviced ormaintained. To reduce the riskof serious injury, never attemptto re-inflate a tire which hasbeen run flat or seriouslyunder-inflated without firstremoving the tire from the wheelassembly for inspection. Do notattempt to add air to tires orreplace tires or wheels withoutfirst taking precautions toprotect persons and property.
All tires with Steel Carcass Plies(if equipped):
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a greater chance of causing tiredamage than at a lower speed.Moreover, driving at high speedreduces the reaction timeavailable to avoid accidents andbring your vehicle to a safe stop.
If you see any damage to a tire orwheel, replace it with the spare atonce and visit a participating TireRetailer.
Exceeding the maximum speedsshown on the following page foreach type of tire will cause the tireto build up excessive heat whichcan cause tire damage that couldresult in sudden tire destructionand rapid air loss. Failure tocontrol a vehicle when one ormore tires experience a sudden airloss can lead to an accident.
In any case, you should notexceed reasonable speeds asindicated by the legal limitsand driving conditions.
DO NOT OVERLOAD: DRIVINGON ANY OVERLOADED TIRE ISDANGEROUS
The maximum load rating of yourtires is molded on the tire sidewall.Do not exceed this rating. Followthe loading instructions of themanufacturer of your vehicle andthis will ensure that your tires arenot overloaded. Tires which areloaded beyond their maximum
allowable loads for the particularapplication will build up excessiveheat that may result in sudden tiredestruction. Do not exceed thegross axle weight rating for anyaxle on your vehicle.
TIRE ALTERATIONS
Do not make or allow to be madeany alterations on your tires.Alterations may prevent properperformance, leading to tiredamage which can result in anaccident. Tires which becomeunserviceable due to alterationssuch as truing, whitewall inlays,addition of balancing or sealantliquids, or the use of tire dressingcontaining petroleum distillatesare excluded from warrantycoverage.
REPAIRS - WHEREVERPOSSIBLE, SEE YOUR TIRERETAILER AT ONCE
If any tire sustains a puncture,have the tire demounted andthoroughly inspected by a tireretailer for possible damage thatmay have occurred. A tread areapuncture in any passenger or lighttruck tire can be repaired providedthat the puncture hole is not morethan 1/4” in diameter, not morethan one radial cable per casingply is damaged, and the tire hasnot been damaged further by thepuncturing object or by runningunderinflated. Tire puncturesconsistent with these guidelinesshould only be repaired by
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•Avoid potholes and objects onthe road
•Do not run over curbs or hit thetire against a curb whenparking
Highway Hazards
No matter how carefully you drivethere’s always the possibility thatyou may eventually have a flat tireon the highway. Drive slowly to theclosest safe area out of traffic.This may further damage the flattire, but your safety is moreimportant.
If you feel a sudden vibration orride disturbance when driving, oryou suspect your tire or vehiclehas been damaged, immediatelyreduce your speed. Drive withcaution until you can safely pulloff the road. Stop and inspect thetires for damage. If a tire isunder-inflated or damaged,deflate it, remove wheel andreplace it with your spare tire andwheel. If you cannot detect acause, have the vehicle towed tothe nearest repair facility or tiredealer to have the vehicleinspected.
Tire and Wheel Alignment
A bad jolt from hitting a curb orpothole can cause the front endof your vehicle to becomemisaligned or cause damage toyour tires. If your vehicle seems topull to one side when you’redriving, the wheels may be out ofalignment. Have an authorizeddealer check the wheel alignmentperiodically.
Wheel misalignment in the frontor the rear can cause uneven andrapid treadwear of your tires andshould be corrected by anauthorized dealer. Front-wheeldrive vehicles and those with anindependent rear suspension mayrequire alignment of all fourwheels.
The tires should also be balancedperiodically. An unbalanced tireand wheel assembly may result inirregular tire wear.
Tire Rotation
Note:If your tires show unevenwear ask an authorized dealer tocheck for and correct any wheelmisalignment, tire imbalance ormechanical problem involvedbefore tire rotation.
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Tightening Lug Nuts
Tighten the lug nuts to the specified torque1 at 500 mi(800 km) after any wheel disturbance (such as tire rota-tion, changing a flat tire or wheel removal).
Single rear wheels
Tighten the wheel lug nuts to the specified torque1 at100 mi (160 km), and again at 500 mi (800 km) of newvehicle operation and after any wheel disturbance (suchas tire rotation, changing a flat tire or wheel removal).
Dual rear wheels
1 See Technical Specifications (page 289).
Multi-point Inspection
In order to keep your vehicle running right,it is important to have the systems on yourvehicle checked regularly. This can helpidentify potential issues and prevent majorproblems. We recommend having thefollowing multi-point inspection performedat every scheduled maintenance intervalto help make sure your vehicle keepsrunning great.
Multi-point Inspection
Horn operationAccessory drive belt(s)
Radiator, cooler, heater and A/C hosesBattery performance
Suspension component for leaks ordamageEngine air filter
Steering and linkageExhaust system
Tires (including spare) for wear and proper
pressure2Exterior lamps operation
Windshield for cracks, chips or pitsFluid levels1; fill if necessary
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