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362 Vehicle Care
trash or pouring it on the ground,into sewers, or into streams orbodies of water. Recycle it by takingit to a place that collects used oil.
Engine Oil Life System
When to Change Engine Oil
This vehicle has a computer systemthat indicates when to change theengine oil and filter. This is basedon a combination of factors whichinclude engine revolutions, enginetemperature, and miles driven.Based on driving conditions, themileage at which an oil change isindicated can vary considerably. Forthe oil life system to work properly,the system must be reset every timethe oil is changed.
On some vehicles, when the systemhas calculated that oil life has beendiminished, a CHANGE ENGINEOIL SOON message comes on toindicate that an oil change isnecessary. SeeEngine OilMessages0152.Changetheoilassoon as possible within the next1000km (600mi). It is possible that,if driving under the best conditions,
the oil life system might indicate thatan oil change is not necessary forup to a year. The engine oil andfilter must be changed at least onceayearand,atthistime,thesystemmust be reset. For vehicles withoutthe CHANGE ENGINE OIL SOONmessage, an oil change is neededwhen the OIL LIFE REMAININGpercentage is near 0%. Your dealerhas trained service people who willperform this work and reset thesystem. It is also important to checkthe oil regularly over the course ofan oil drain interval and keep it atthe proper level.
If the system is ever resetaccidentally, the oil must bechanged at 5 000 km (3,000 mi)since the last oil change.Remember to reset the oil lifesystem whenever the oil is changed.
How to Reset the Engine Oil
Life System
Reset the system whenever theengine oil is changed so that thesystem can calculate the nextengine oil change. Always reset the
engine oil life to 100% after every oilchange. It will not reset itself. Toreset the engine oil life system:
1. Display the OIL LIFEREMAINING on the DIC. If thevehicle does not have DICbuttons, the vehicle must be inP(Park)toaccessthisdisplay.SeeDriver Information Center(DIC) (Base Level)0145orDriver Information Center (DIC)(Uplevel)0147.
2. Press and holdV,orthetrip
odometer reset stem if thevehicle does not have DICbuttons, for several seconds.The oil life will changeto 100%.
The oil life system can also be resetas follows:
1. Turn the ignition to ON/RUNwith the engine off.
2. Fully press the acceleratorpedal slowly three times withinfive seconds.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
Vehicle Care 363
3. Display the OIL LIFEREMAINING on the DIC. If thedisplay shows 100%, thesystem is reset.
If the vehicle has a CHANGEENGINE OIL SOON message and itcomes back on when the vehicle isstarted and/or the OIL LIFEREMAINING is near 0%, the engineoil life system has not been reset.Repeat the procedure.
Automatic Transmission
Fluid (6-Speed
Transmission)
When to Check and Change
Automatic Transmission Fluid
It is usually not necessary to checkthe transmission fluid level. The onlyreason for fluid loss is atransmission leak or overheatedtransmission. If a small leak issuspected, then use the followingchecking procedures to check thefluid level. However, if there is alarge leak, then it may be necessaryto have the vehicle towed to a
dealer service department and haveit repaired before driving the vehiclefurther.
Caution
Use of the incorrect automatic
transmission fluid may damage
the vehicle, and the damage may
not be covered by the vehicle
warranty. Always use the
automatic transmission fluid listed
inRecommended Fluids and
Lubricants0462.
Change the fluid and filter at thescheduled maintenance intervalslisted inMaintenance Schedule0452.Besuretousethetransmission fluid listed inRecommended Fluids andLubricants0462.
How to Check Automatic
Transmission Fluid
Caution
To o m u c h o r t o o l i t t l e f l u i d c a n
damage the transmission. Too
much can mean that some of the
fluid could come out and fall on
hot engine parts or exhaust
system parts, starting a fire. Too
little fluid could cause the
transmission to overheat. Be sure
to get an accurate reading if
checking the transmission fluid.
Before checking the fluid level,prepare the vehicle:
1. Start the engine and park thevehicle on a level surface.Keep the engine running.
2. Apply the parking brake andplace the shift lever in P (Park).
3. With your foot on the brakepedal, move the shift leverthrough each gear range,pausing for about

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Vehicle Care 369
Warning (Continued)
keep hands, clothing, and tools
away from any engine
cooling fan.
6.0L V8 Engine
1. Coolant Surge Tank
2. Coolant Surge TankPressure Cap
3. Engine Belt-Driven CoolingFan (Out of View)
{Warning
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you do,
you can be burned.
Do not run the engine if there is a
leak. If you run the engine, it
could lose all coolant. That could
cause an engine fire, and you
could be burned. Get any leak
fixed before you drive the vehicle.
Caution
Using coolant other than
DEX-COOL®can cause
premature engine, heater core,
or radiator corrosion. In addition,
the engine coolant could require
changing sooner. Any repairs
would not be covered by the
vehicle warranty. Always use
DEX-COOL (silicate-free) coolant
in the vehicle.
Engine Coolant
The cooling system in the vehicle isfilled with DEX-COOL®enginecoolant. This coolant is designed toremain in the vehicle for 5 years or240 000 km (150,000 mi), whicheveroccurs first.
The following explains the coolingsystem and how to check and addcoolant when it is low. If there is aproblem with engine overheating,seeEngine Overheating0372.
What to Use
{Warning
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
The coolant warning system is set
for the proper coolant mixture.
With plain water or the wrong
mixture, the engine could get too
hot but you would not get the
(Continued)

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370 Vehicle Care
Warning (Continued)
overheat warning. The engine
could catch fire and you or others
could be burned. Use a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant.
Use a 50/50 mixture of clean,drinkable water and DEX-COOLcoolant. If using this mixture,nothing else needs to be added.This mixture:
.Gives freezing protection downto✓37 °C (✓34 °F), outsidetemperature.
.Gives boiling protection up to129 °C (265 °F), enginetemperature.
.Protects against rust andcorrosion.
.Will not damage aluminum parts.
.Helps keep the proper enginetemperature.
Caution
If improper coolant mixture,
inhibitors, or additives are used in
the vehicle cooling system, the
engine could overheat and be
damaged. Too much water in the
mixture can freeze and crack
engine cooling parts. The repairs
would not be covered by the
vehicle warranty. Use only the
proper mixture of engine coolant
for the cooling system. See
Recommended Fluids and
Lubricants0462.
Never dispose of engine coolant byputting it in the trash, or by pouringit on the ground, or into sewers,streams, or bodies of water. Havethe coolant changed by anauthorized service center, familiarwith legal requirements regardingused coolant disposal. This will helpprotect the environment and yourhealth.
Checking Coolant
The coolant surge tank is located inthe engine compartment on thepassenger side of the vehicle. SeeEngine CompartmentOverview0354.
The vehicle must be on a levelsurface when checking the coolantlevel.
5.3L V8 Shown, 4.3L V6, 6.0L V8,
and 6.2L V8 Similar
Check to see if coolant is visible inthe coolant surge tank. If the coolantinside the coolant surge tank isboiling, wait until it cools down. Thecoolant level should be at or above

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374 Vehicle Care
Overheated Engine
Protection
Operating Mode
If an overheated engine conditionexists and the ENGINE POWER ISREDUCED message displays, anoverheat protection mode whichalternates firing groups of cylindershelps to prevent engine damage. Inthis mode, a loss in power andengine performance will be noticed.This operating mode allows thevehicle to be driven to a safe placein an emergency. Driving extendeddistances and/or towing a trailer inthe overheat protection modeshould be avoided.
Caution
After driving in the overheated
engine protection operating
mode, the engine oil will be
severely degraded. Any repairs
performed before the engine is
cool may cause engine damage.
Allow the engine to cool before
(Continued)
Caution (Continued)
attempting any repair. Repair the
cause of coolant loss, change the
oil, and reset the oil life system.
SeeEngine Oil0359.
Engine Fan
If the vehicle has a clutched enginecooling fan, when the clutch isengaged, the fan spins faster toprovide more air to cool the engine.In most everyday driving conditions,the fan is spinning slower and theclutch is not fully engaged. Thisimproves fuel economy and reducesfan noise. Under heavy vehicleloading, trailer towing, and/or highoutside temperatures, the fan speedincreases as the clutch more fullyengages, so an increase in fannoise may be heard. This is normaland should not be mistaken as thetransmission slipping or makingextra shifts. It is merely the coolingsystem functioning properly. The fanwill slow down when additionalcooling is not required and theclutch disengages.
This fan noise may also be heardwhen starting the engine. It will goaway as the fan clutch partiallydisengages.
If the vehicle has electric coolingfan(s), the fans may be heardspinning at low speed during mosteveryday driving. The fans may turnoff if no cooling is required. Underheavy vehicle loading, trailer towing,high outside temperatures,or operation of the air conditioningsystem, the fans may change tohigh speed and an increase in fannoise may be heard. This is normaland indicates that the coolingsystem is functioning properly. Thefans will change to low speed whenadditional cooling is no longerrequired.
The electric engine cooling fansmay run after the engine has beenturned. off. This is normal and noservice is required.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
404 Vehicle Care
maximum capacity of fuel, oil,
and coolant, but without
passengers and cargo.
DOT Markings:Acodemolded
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.
Department of Transportation
(DOT) Motor Vehicle Safety
Standards. The DOT code
includes the Tire Identification
Number (TIN), an alphanumeric
designator which can also
identify the tire manufacturer,
production plant, brand, and
date of production.
GVWR:Gross Vehicle Weight
Rating. SeeVehicle Load
Limits0259.
GAWR FRT:Gross Axle Weight
Rating for the front axle. See
Vehicle Load Limits0259.
GAWR RR:Gross Axle Weight
Rating for the rear axle. See
Vehicle Load Limits0259.
Intended Outboard Sidewall:
The side of an asymmetrical tire
that must always face outward
when mounted on a vehicle.
Kilopascal (kPa):The metric
unit for air pressure.
Light Truck (LT-Metric) Tire:A
tire used on light duty trucks and
some multipurpose passenger
vehicles.
Load Index:An assigned
number ranging from 1 to 279
that corresponds to the load
carrying capacity of a tire.
Maximum Inflation Pressure:
The maximum air pressure to
which a cold tire can be inflated.
The maximum air pressure is
molded onto the sidewall.
Maximum Load Rating:The
load rating for a tire at the
maximum permissible inflation
pressure for that tire.
Maximum Loaded Vehicle
Weight:The sum of curb
weight, accessory weight,
vehicle capacity weight, and
production options weight.
Normal Occupant Weight:The
number of occupants a vehicle
is designed to seat multiplied by
68 kg (150 lb). SeeVehicle Load
Limits0259.
Occupant Distribution:
Designated seating positions.
Outward Facing Sidewall:The
side of an asymmetrical tire that
has a particular side that faces
outward when mounted on a
vehicle. The side of the tire that
contains a whitewall, bears
white lettering, or bears
manufacturer, brand, and/or
model name molding that is
higher or deeper than the same
moldings on the other sidewall
of the tire.

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Vehicle Care 427
{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
damage, be sure to fit the jack lift
head into the proper location
before raising the vehicle.
6. Turn the wheel wrenchclockwise to raise the vehicle.Raise the vehicle far enoughoff the ground so there isenough room for the spare tireto fit under the wheel well.
7. Remove all the wheel nuts andtake off 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
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.
8. Remove any rust or dirt fromthe wheel bolts, mountingsurfaces, and spare wheel.
9. Install the spare tire.
{Warning
Never use oil or grease on bolts
or nuts because the nuts might
come loose. The vehicle's wheel
could fall off, causing a crash.
10. Put the wheel nuts back onwith the rounded end of thenuts toward the wheel.

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442 Vehicle Care
Caution (Continued)
your dealer. Follow all
manufacturer directions regarding
correct product usage, necessary
safety precautions, and
appropriate disposal of any
vehicle care product.
Caution
Avoid using high-pressure
washes closer than 30 cm (12 in)
to the surface of the vehicle. Use
of power washers exceeding
8,274 kPa (1,200 psi) can result
in damage or removal of paint
and decals.
Caution
Do not power wash any
component under the hood that
has thisesymbol.
(Continued)
Caution (Continued)
This could cause damage that
would not be covered by the
vehicle warranty.
If using an automatic car wash,follow with the car washinstructions. The windshield wiperand rear window wiper, if equipped,must be off. Remove anyaccessories that may be damagedor interfere with the car washequipment.
SeePower Assist Steps042forcleaning information.
Rinse the vehicle well, beforewashing and after, to remove allcleaning agents completely. If theyare allowed to dry on the surface,they could stain.
Dry the finish with a soft, cleanchamois or an all-cotton towel toavoid surface scratches and waterspotting.
Finish Care
Application of aftermarket clearcoatsealant/wax materials is notrecommended. If painted surfacesare damaged, see your dealer tohave the damage assessed andrepaired. Foreign materials such ascalcium chloride and other salts, icemelting agents, road oil and tar, treesap, bird droppings, chemicals fromindustrial chimneys, etc., candamage the vehicle's finish if theyremain on painted surfaces. Washthe vehicle as soon as possible.If necessary, use non-abrasivecleaners that are marked safe forpainted surfaces to remove foreignmatter.
Occasional hand waxing or mildpolishing should be done to removeresidue from the paint finish. Seeyour dealer for approved cleaningproducts.
Do not apply waxes or polishes touncoated plastic, vinyl, rubber,decals, simulated wood, or flat paintas damage can occur.