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262 Vehicle Care
Warning (Continued)
off and cause an accident. When
changing a wheel, remove any
rust or dirt from places where the
wheel attaches to the vehicle. In
an emergency, a cloth or a paper
towel can be used; however, use
ascraperorwirebrushlaterto
remove all rust or dirt.
Lightly coat the center of the
wheel hub with wheel bearing
grease after a wheel change or
tire rotation to prevent corrosion
or rust build-up. Do not get
grease on the flat wheel
mounting surface or on the
wheel nuts or bolts.
When It Is Time for New
Tires
Factors such as maintenance,temperatures, driving speeds,vehicle loading, and road conditionsaffect the wear rate of the tires.
Treadwear indicators are one way totell when it is time for new tires.Treadwear indicators appear whenthe tires have only 1.6 mm (1/16 in)or less of tread remaining.SeeTire Inspection0260andTireRotation0261.
The rubber in tires ages over time.This also applies to the spare tire,if the vehicle has one, even if it isnever used. Multiple factorsincluding temperatures, loadingconditions, and inflation pressuremaintenance affect how fast agingtakes place. GM recommends thattires, including the spare ifequipped, be replaced after sixyears, regardless of tread wear. The
tire manufacture date is the last fourdigits of the DOT Tire IdentificationNumber (TIN) which is molded intoone side of the tire sidewall. Thefirst two digits represent the week(01–52) and the last two digits, theyear. For example, the third week ofthe year 2010 would have afour-digit DOT date of 0310.
Vehicle Storage
Tires age when stored normallymounted on a parked vehicle. Parkavehiclethatwillbestoredforatleast a month in a cool, dry, cleanarea away from direct sunlight toslow aging. This area should be freeof grease, gasoline, or othersubstances that can deterioraterubber.
Parking for an extended period cancause flat spots on the tires thatmay result in vibrations whiledriving. When storing a vehicle forat least a month, remove the tires orraise the vehicle to reduce theweight from the tires.

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266 Vehicle Care
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
Ccorrespondstoalevelof
performance which all
passenger car tires must meet
under the Federal Motor Safety
Standard No. 109. Grades B and
Arepresenthigherlevelsof
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,
underinflation, or excessive
loading, either separately or in
combination, can cause heat
buildup and possible tire failure.
Wheel Alignment and Tire
Balance
The tires and wheels were alignedand balanced at the factory toprovide the longest tire life and bestoverall performance. Adjustments towheel alignment and tire balancingare not necessary on a regularbasis. Consider an alignment checkif there is unusual tire wear or thevehicle is significantly pulling to oneside or the other. Some slight pull tothe left or right, depending on thecrown of the road and/or other roadsurface variations such as troughsor ruts, is normal. If the vehicle isvibrating when driving on a smoothroad, the tires and wheels may needto be rebalanced. See your dealerfor proper diagnosis.
Wheel Replacement
Replace any wheel that is bent,cracked, or badly rusted orcorroded. If wheel nuts keep comingloose, the wheel, wheel bolts, andwheel nuts should be replaced.If the wheel leaks air, replace it.
Some aluminum wheels can berepaired. See your dealer if any ofthese conditions exist.
Yo u r d e a l e r w i l l k n o w t h e k i n d o fwheel that is needed.
Each new wheel should have thesame load-carrying capacity,diameter, width, offset, and bemounted the same way as the one itreplaces.
Replace wheels, wheel bolts, wheelnuts, or Tire Pressure MonitorSystem (TPMS) sensors with newGM original equipment parts.
{Warning
Using the wrong replacement
wheels, wheel bolts, or wheel
nuts can be dangerous. It could
affect the braking and handling of
the vehicle. Tires can lose air,
and cause loss of control, causing
acrash.Alwaysusethecorrect
wheel, wheel bolts, and wheel
nuts for replacement.

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Vehicle Care 267
Caution
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer or
odometer calibration, headlamp
aim, bumper height, vehicle
ground clearance, and tire or tire
chain clearance to the body and
chassis.
Used Replacement Wheels
{Warning
Replacing a wheel with a used
one is dangerous. How it has
been used or how far it has been
driven may be unknown. It could
fail suddenly and cause a crash.
When replacing wheels, use a
new GM original equipment
wheel.
Tire Chains
{Warning
Do not use tire chains. There is
not enough clearance. Tire chains
used on a vehicle without the
proper amount of clearance can
cause damage to the brakes,
suspension, or other vehicle
parts. The area damaged by the
tire chains could cause loss of
control and a crash.
Use another type of traction
device only if its manufacturer
recommends it for the vehicle's
tire size combination and road
conditions. Follow that
manufacturer's instructions. To
avoid vehicle damage, drive slow
and readjust or remove the
traction device if it contacts the
vehicle. Do not spin the wheels.
If traction devices are used, install
them on the front tires.
If a Tire Goes Flat
It is unusual for a tire to blow outwhile driving, especially if the tiresare maintained properly. SeeTires0248.Ifairgoesoutofatire,itismuch more likely to leak out slowly.But if there ever is a blowout, hereare a few tips about what to expectand what to do:
If a front tire fails, the flat tirecreates a drag that pulls the vehicletoward that side. Take your foot offthe accelerator pedal and grip thesteering wheel firmly. Steer tomaintain lane position, and thengently brake to a stop, well off theroad, if possible.
Arearblowout,particularlyonacurve, acts much like a skid andmay require the same correction asused in a skid. Stop pressing theaccelerator pedal and steer tostraighten the vehicle. It may bevery bumpy and noisy. Gently braketo a stop, well off the road,if possible.

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Vehicle Care 271
6. Insert the jack handle into thejack and the wheel wrenchonto the end of the jack handle.
7. Turn the wheel wrenchclockwise until the lift head isfirmly contacting the properlifting point nearest the flat tire.
{Warning
Getting under a vehicle when it is
lifted on a jack is dangerous.
If the vehicle slips off the jack,
you could be badly injured or
killed. Never get under a vehicle
when it is supported only by
ajack.
{Warning
Raising the vehicle with the jack
improperly positioned can
damage the vehicle and even
make the vehicle fall. To help
avoid personal injury and vehicle
(Continued)
Warning (Continued)
damage, be sure to fit the jack lift
head into the proper location
before raising the vehicle.
8. Turn the wheel wrenchclockwise to raise the vehicle.Raise the vehicle far enoughoff the ground so there isenough room for the compactspare tire to fit underneath thewheel well.
9. Turn the wheel nutscounterclockwise toremove them.
10. Remove the flat tire.
{Warning
Rust or dirt on a wheel, or on the
parts to which it is fastened, can
make wheel nuts become loose
after time. The wheel could come
off and cause an accident. When
changing a wheel, remove any
(Continued)
Warning (Continued)
rust or dirt from places where the
wheel attaches to the vehicle. In
an emergency, a cloth or a paper
towel can be used; however, use
ascraperorwirebrushlaterto
remove all rust or dirt.
11 . R e m o v e a n y r u s t o r d i r t f r o mthe wheel bolts, mountingsurfaces, and spare wheel.
12. Place the compact spare tireon the wheel-mounting surface.

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Vehicle Care 277
{Warning
Fans or other moving engine
parts can injure you badly. Keep
your hands away from moving
parts once the engine is running.
5. Connect one end of the redpositive (+) cable to thepositive (+) terminal on thedischarged battery.
6. Connect the other end of thered positive (+) cable to thepositive (+) terminal of the goodbattery.
7. Connect one end of the blacknegative (–)cabletothenegative (–)terminalofthegood battery.
8. Connect the other end of theblack negative (–)cabletothenegative (–)postforthedischarged battery.
9. Start the engine in the vehiclewith the good battery and runthe engine at idle speed for atleast four minutes.
10. Try to start the vehicle that hadthe dead battery. If it will notstart after a few tries, itprobably needs service.
Caution
If the jumper cables are
connected or removed in the
wrong order, electrical shorting
may occur and damage the
vehicle. The repairs would not be
covered by the vehicle warranty.
Always connect and remove the
jumper cables in the correct order,
making sure that the cables do
not touch each other or other
metal.
Jumper Cable Removal
Reverse the sequence exactly whenremoving the jumper cables.
After starting the disabled vehicleand removing the jumper cables,allow it to idle for several minutes.
Towing the Vehicle
Caution
Incorrectly towing a disabled
vehicle may cause damage. The
damage would not be covered by
the vehicle warranty.
Do not lash or hook to
suspension components. Use the
proper straps around the tires to
secure the vehicle.
Have the vehicle towed on a flatbedcar carrier. A wheel lift tow truckcould damage the vehicle.
Consult your dealer or aprofessional towing service if thedisabled vehicle must be towed.
Recreational Vehicle
Towing
Recreational vehicle towing meanstowing the vehicle behind anothervehicle, such as a motor home. Thetwo most common types ofrecreational vehicle towing are

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278 Vehicle Care
known as dinghy towing and dollytowing. Dinghy towing is towing thevehicle with all four wheels on theground. Dolly towing is towing thevehicle with two wheels on theground and two wheels up on adevice known as a dolly.
Here are some important things toconsider before recreational vehicletowing:
.What is the towing capacity ofthe towing vehicle? Be sure toread the tow vehiclemanufacturer'srecommendations.
.What is the distance that will betraveled? Some vehicles haverestrictions on how far and howlong they can tow.
.Is the proper towing equipmentgoing to be used? See yourdealer or trailering professionalfor additional advice andequipment recommendations.
.Is the vehicle ready to betowed? Just as preparing thevehicle for a long trip, make surethe vehicle is prepared to betowed.
Caution
Use of a shield mounted in front
of the vehicle grille could restrict
airflow and cause damage to the
transmission. The repairs would
not be covered by the vehicle
warranty. If using a shield, only
use one that attaches to the
towing vehicle.
Dinghy Towing RS Model with
Automatic Transmission
Caution
If the vehicle is towed with all four
wheels on the ground, the
drivetrain components could be
damaged. The repairs would not
be covered by the vehicle
warranty. Do not tow the vehicle
with all four wheels on the
ground.

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Vehicle Care 279
The vehicle was not designed to betowed with all four wheels on theground. If the vehicle must betowed, a dolly should be used. Seethe information on dolly towing laterin this section.
Dinghy Towing All except RS
Model with Automatic
Transmission
When dinghy towing a vehicle withan automatic transmission, thevehicle should be run at thebeginning of each day and at eachRV fuel stop for about five minutes.This will ensure proper lubrication oftransmission components.
To d i n g h y t o w t h e v e h i c l e f r o m t h efront with all four wheels on theground:
1. Position the vehicle to tow andthen secure it to the towingvehicle.
2. Shift the automatictransmission to P (Park) or amanual transmission into1(First) gear and turn theignition to LOCK/OFF.
3. Set the parking brake.
4. To prevent the battery fromdraining while the vehicle isbeing towed, remove the DLISfuse from the instrument panelfuse block. SeeInstrumentPanel Fuse Block0246.
5. Turn the ignition to ACC/ACCESSORY.
6. Shift an automatic transmissionto N (Neutral) or a manualtransmission to Neutral.
7. Release the parking brake.
Reinstall the DLIS fuse once thedestination has been reached.
Caution
If 105 km/h (65 mph) is exceeded
while towing the vehicle, it could
be damaged. Never exceed
105 km/h (65 mph) while towing
the vehicle.
Caution
To w i n g t h e v e h i c l e f r o m t h e r e a r
could damage it. Also, repairs
would not be covered by the
vehicle warranty. Never have the
vehicle towed from the rear.

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280 Vehicle Care
Dolly Towing from the Front
The vehicle can be towed from thefront using a dolly. To tow thevehicle using a dolly:
1. Attach the dolly to the towvehicle following the dollymanufacturer's instructions.
2. Drive the front wheels onto thedolly.
3. Put an automatic transmissionin P (Park) or a manualtransmission into 1 (First) gear.
4. Set the parking brake andremove the key.
5. Clamp the steering wheel in astraight-ahead position with aclamping device designed fortowing.
6. Secure the vehicle to the dolly.
7. Release the parking brake.
Dolly Towing from the Rear
Caution
To w i n g t h e v e h i c l e f r o m t h e r e a r
could damage it. Also, repairs
would not be covered by the
vehicle warranty. Never have the
vehicle towed from the rear.
Appearance Care
Exterior Care
Locks
Locks are lubricated at the factory.Use a de-icing agent only whenabsolutely necessary, and have thelocks greased after using. SeeRecommended Fluids andLubricants0300.
Washing the Vehicle
To p r e s e r v e t h e v e h i c l e ' s f i n i s h ,wash it often and out of directsunlight.
Caution
Do not use petroleum-based,
acidic, or abrasive cleaning
agents as they can damage the
vehicle's paint, metal, or plastic
parts. If damage occurs, it would
not be covered by the vehicle
warranty. Approved cleaning
products can be obtained from
(Continued)