2017 CHEVROLET SILVERADO fuel

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
Driving and Operating 285
{Warning
Shifting the transfer case to
N(Neutral) can cause the vehicle
to roll even if the transmission is
in P (Park). You or someone else
could be seriously injured. Be
sure to set the parking brake
before placing the transfer case in
N(Neutral). SeeParking
Brake0293.
Caution
Extended high-speed operation in
4nmay damage or shorten the
life of the drivetrain.
Engagement noise and bump when
shifting between 4nand 4mor from
N(Neutral), with the engine running,is normal.
Shifting into 4nwill turn Traction
Control and StabiliTrak®off. SeeTr a c t i o n C o n t r o l / E l e c t r o n i c S t a b i l i t yControl0295.
Manual Transfer Case
Move the lever to shift into and outof four-wheel drive.
An indicator light comes on whenfour-wheel drive is engaged. SeeFour-Wheel-Drive Light0141.
N(Neutral) :Use only when thevehicle needs to be towed. SeeRecreational Vehicle Towing0437orTo w i n g t h e V e h i c l e0436.
2m(Two-Wheel Drive High) :Use
this setting for driving on moststreets and highways. The front axleis not engaged. This settingprovides the best fuel economy.
4n(Four-Wheel Drive Low) :This
setting also engages the front axleand delivers extra torque. Choose 4nif driving off-road in deep sand,deep mud, or deep snow, and whileclimbing or descending steep hills.When engaged, keep vehicle speedbelow 72 km/h (45 mph).
4m(Four-Wheel Drive High) :Use
this setting when extra traction isneeded. The front axle engages andhelps when driving on snowy or icyroads, when off-roading, or whenplowing snow.
The vehicle can be shifted between
2mand 4mwhile the vehicle is
moving. In extremely cold weather,it may be necessary to stop or slow

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
286 Driving and Operating
the vehicle to shift into 4m.
Using the Manual Transfer Case
.Use quick motions to shift into or
out of 4nor N (Neutral).
.Shifting may be harder when thevehicle is cold, but will return tonormal once warmed up.
.Four-wheel drive reduces fueleconomy.
Shifting from 2mto 4m
.Shifts can be made at anyvehicle speed.
.Shift in one continuous motion.
.Shifting while the vehicle is inmotion may require thatmoderate force be applied to the
shift lever before 4mcan be
engaged, especially in coldweather.
.In extremely cold weather, it maybe necessary to slow or stop thevehicle to shift.
.While in 4m,thevehiclecanbe
driven at any posted legal speedlimit.
Shifting In or Out of 4n
Caution
Shifting the transfer case into 4n
while moving at speeds faster
than 5 km/h (3 mph) may cause
premature wear to the transfer
case, and may cause the gears to
grind.
1. If possible, shift with thevehicle moving 5 km/h (3 mph)or less.
2. Shift the transmission intoN(Neutral).
3. Shift the transfer case shiftlever in one continuous motion.
4. Shifting with the vehicle at astop may be more difficult. It ispossible that the shift will notcomplete and the transfer casewill remain in N (Neutral). Thisis normal. To complete theshift, with the engine running,shift the transmission to
D(Drive) and back toN(Neutral), and reattempt thetransfer case shift.
Shifting In or Out of N (Neutral)
1. Have the engine running.
2. Set the parking brake. Pressand hold the brake pedal. SeeParking Brake0293.
3. Place the transmission intoN(Neutral).
4. Shift the transfer case lever inone continuous motion into orout of N (Neutral).
Electronic Transfer Case

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
Driving and Operating 287
Use the transfer case knob, next tothe steering wheel, to shift into andout of four-wheel drive for extratraction.
All of the lights will blink on then offmomentarily when the ignition ismoved to the ON/RUN position. Thelight that remains on will indicate thestate of the Transfer Case.
If the indicator mark on the switchdoes not match up with the lightthen that likely means the switchwas moved when the ignitionwas off.
The indicator mark on the switchmust line up with the indicator lightbefore a shift can be commanded.To c o m m a n d a s h i f t r o t a t e t h etransfer case switch to the newdesired position. The light will blinkmeaning that the shift is in progress.When the shift is completed the newposition will be illuminated. If thetransfer case can not complete ashift command, it will go back to itslast chosen setting.
Caution
Shifting the transmission into gear
before the requested mode
indicator light has stopped
flashing could damage the
transfer case.
The settings are:
N(Neutral) :Use only when thevehicle needs to be towed. SeeRecreational Vehicle Towing0437orTo w i n g t h e V e h i c l e0436.
2m(Two-Wheel Drive High) :Use
for driving on most streets andhighways. The front axle is notengaged. This setting provides thebest fuel economy.
4n(Four-Wheel Drive Low) :This
setting engages the front axle and
delivers extra torque. Choose 4nif
driving off-road in deep sand, deepmud, or deep snow, and whileclimbing or descending steep hills.When engaged, keep vehicle speedbelow 72 km/h (45 mph).
Shifting into 4nwill turn Traction
Control and StabiliTrak off. SeeTr a c t i o n C o n t r o l / E l e c t r o n i c S t a b i l i t yControl0295.
4m(Four-Wheel Drive High) :Use
when extra traction is needed. Thefront axle engages and helps whendriving on snowy or icy roads, whenoff-roading, or when plowing snow.
The vehicle can be shifted from 2m
to 4mwhile the vehicle is moving.
Shifting Into 4m
Turn the knob to 4mat any speed
up to 121 km/h (75 mph), except
from 4n.Theindicatorlightwillflash
while shifting and will remain on theselected setting.
Shifting Into 2m
Turn the knob to 2mat any speed,
except when shifting from 4n.
Shifting Into 4n
When 4nis engaged, vehicle speed
should be kept below 72 km/h(45 mph).

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
Driving and Operating 289
10. Turn the ignition to LOCK/OFF.
Shifting Out of N (Neutral)
To s h i f t :
1. Set the parking brake andapply the brake pedal.
2. Turn the ignition to ON/RUNwith the engine off.
3. Shift the transmission toN(Neutral).
4. Turn the transfer case knob to
2m.
After the transfer case hasshifted out of N (Neutral), theN(Neutral) light will goout.
5. Release the parking brake.
Caution
Shifting the transmission into gear
before the requested mode
indicator light has stopped
flashing could damage the
transfer case.
6. Start the engine and shift thetransmission to thedesired gear.
Automatic Transfer Case
If equipped, use the transfer caseknob next to the steering wheel toshift into and out of four-wheel drive.
All of the lights will blink on then offmomentarily when the ignition ismoved to the ON/RUN position. Thelight that remains on will indicate thestate of the Transfer Case.
If the indicator mark on the switchdoes not match up with the lightthen that likely means the switchwas moved when the ignitionwas off.
The indicator mark on the switchmust line up with the indicator lightbefore a shift can be commanded.To c o m m a n d a s h i f t r o t a t e t h etransfer case switch to the newdesired position. The light will blinkmeaning that the shift is in progress.When the shift is completed the newposition will be illuminated. If thetransfer case can not complete ashift command, it will go back to itslast chosen setting.
The settings are:
N(Neutral) :Use only when thevehicle needs to be towed. SeeRecreational Vehicle Towing0437orTo w i n g t h e V e h i c l e0436.
2m(Two-Wheel Drive High) :Use
for driving on most streets andhighways. The front axle is notengaged. This setting provides thebest fuel economy.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
290 Driving and Operating
AUTO (Automatic Four-WheelDrive) :Use when road surfacetraction conditions are variable.When driving in AUTO, the frontaxle is engaged, and the vehicle'spower is sent to the front and rearwheels automatically based ondriving conditions. This settingprovides slightly lower fuel economy
than 2m.
Do not use AUTO mode,if equipped, to park on a steepgrade with poor traction such as ice,snow, mud, or gravel. In AUTOmode only the rear wheels will holdthe vehicle from sliding whenparked. If parking on a steep grade,
use 4mto keep all four wheels
engaged.
4m(Four-Wheel Drive High) :Use
this position when extra traction isneeded, such as when driving onsnowy or icy roads, whenoff-roading, or when plowing snow.
4n(Four-Wheel Drive Low) :This
setting engages the front axle and
delivers extra torque. Choose 4n
when driving off-road in deep sand,deep mud, or deep snow, and whileclimbing or descending steep hills.
Shifting into 4nwill turn Traction
Control and StabiliTrak off. SeeTr a c t i o n C o n t r o l / E l e c t r o n i c S t a b i l i t yControl0295.
Shifting Into 4mor AUTO
Turn the knob to the 4mor AUTO
position at any speed, except from
4n.Theindicatorlightwillflash
while shifting and will remain onwhen the shift is completed.
Shifting Into 2m
Turn the knob to 2mat any speed,
except when shifting from 4n.The
indicator light will flash while shiftingand will remain on when the shift iscompleted.
Shifting Into 4n
When 4nis engaged, keep vehicle
speed below 72 km/h (45 mph).
To s h i f t :
1. The ignition must be in ON/RUN and the vehicle must bestopped or moving less than5km/h (3mph) with thetransmission in N (Neutral). It isbest for the vehicle to bemoving 1.6 to 3.2 km/h(1 to 2 mph).
2. Turn the knob to 4n.Waitfor
the 4nindicator light to stop
flashing before shifting thetransmission into gear.
Caution
Shifting the transmission into gear
before the requested mode
indicator light has stopped
flashing could damage the
transfer case.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
Driving and Operating 311
Fuel
For diesel engine vehicles, see“Fuel for Diesel Engines”in theDuramax diesel supplement.
GM recommends the use of TOPTIER Detergent Gasoline to keepthe engine cleaner and reduceengine deposits. Seewww.toptiergas.com for a list of TOPTIER Detergent Gasoline marketersand applicable countries.
If the vehicle has a yellow sticker onthe fuel door, E85 or FlexFuel canbe used. SeeE85 orFlexFuel0312.
Except the 6.2L engine, use regularunleaded gasoline meeting ASTMspecification D4814 with a postedoctane rating of 87 or higher. Do notuse gasoline with a posted octanerating of less than 87, as this maycause engine knock and will lowerfuel economy.
For the 6.2L engine, premiumunleaded gasoline meeting ASTMspecification D4814 with a postedoctane rating of 93 is highlyrecommended for best performanceand fuel economy. Unleadedgasoline with an octane rated as lowas 87 can be used. Using unleadedgasoline rated below 93 octane,however, will lead to reducedacceleration and fuel economy.If knocking occurs, use a gasolinerated at 93 octane as soon aspossible, otherwise, the enginecould be damaged. If heavyknocking is heard when usinggasoline with a 93 octane rating, theengine needs service.
Prohibited Fuels
Caution
Do not use fuels with any of the
following conditions; doing so
may damage the vehicle and void
its warranty:
.For vehicles which are notFlexFuel, fuel labeledgreater than 15% ethanol byvolume, such as mid-levelethanol blends (16–50%ethanol), E85, or FlexFuel.
.Fuel with any amount ofmethanol, methylal, andaniline. These fuels cancorrode metal fuel systemparts or damage plastic andrubber parts.
.Fuel containing metals suchas methylcyclopentadienylmanganese tricarbonyl(MMT), which can damagethe emissions controlsystem and spark plugs.
(Continued)

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
312 Driving and Operating
Caution (Continued)
.Fuel with a posted octanerating of less than therecommended fuel. Usingthis fuel will lower fueleconomy and performance,and may decrease the life ofthe emissions catalyst.
California Fuel
Requirements
If the vehicle is certified to meetCalifornia Emissions Standards, it isdesigned to operate on fuels thatmeet California specifications. Seethe underhood emission controllabel. If this fuel is not available instates adopting California EmissionsStandards, the vehicle will operatesatisfactorily on fuels meetingfederal specifications, but emissioncontrol system performance may beaffected. The malfunction indicatorlamp could turn on and the vehiclemay not pass a smog-check test.SeeMalfunction Indicator Lamp(Check Engine Light)0138.Ifthis
occurs, return to your authorizeddealer for diagnosis. If it isdetermined that the condition iscaused by the type of fuel used,repairs may not be covered by thevehicle warranty.
Fuels in Foreign
Countries
The U.S., Canada, and Mexico postfuel octane ratings in anti-knockindex (AKI). For fuel not to use in aforeign country, see“ProhibitedFuels”inFuel0311.
Fuel Additives
To k e e p f u e l s y s t e m s c l e a n , T O PTIER Detergent Gasoline isrecommended. SeeFuel0311.
If TOP TIER Detergent Gasoline isnot available, one bottle of GM FuelSystem Treatment Cleaner added tothe fuel tank at every engine oilchange, can help. GM Fuel SystemTreatment Cleaner is the onlygasoline additive recommended byGeneral Motors. It is available atyour dealer.
If your vehicle is able to use E85 orFlexFuel, GM Fuel SystemTreatment Cleaner - FlexFuel is theonly recommended additive for use.Do not use any other additives withan E85 or FlexFuel vehicle. SeeE85 or FlexFuel0312.
E85 or FlexFuel
Vehicles with a yellow sticker on thefuel door can use either unleadedgasoline or fuel containing up to85% ethanol (E85). All othervehicles should use only theunleaded gasoline as described inFuel0311.
The use of E85 or FlexFuel isencouraged when the vehicle isdesigned to use it. E85 or FlexFuelis made from renewable sources.
To h e l p l o c a t e f u e l s t a t i o n s t h a tcarry E85 or FlexFuel, the U.S.Department of Energy has analternative fuels website. Seewww.afdc.energy.gov/afdc/locator/stations.
E85 or FlexFuel should meetASTM Specification D 5798 orCAN/CGSB–3.512 in Canada. Do

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9956065) - 2017 - CRC - 4/29/16
Driving and Operating 313
not use the fuel if the ethanolcontent is greater than 85%. Fuelmixtures that do not meet ASTM orCGSB specifications can affectdriveability and could cause themalfunction indicator lamp tocome on.
For the 6.0L V8 engine, afterrefueling, the vehicle calculates thecomposition of the fuel. It is notrecommended to repeatedly switchbetween fuels. If fuels are switchedfrequently, add as much fuel aspossible and do not add less than11 L ( 3 g a l ) w h e n r e f u e l i n g . D r i v e a tleast 11 km (7 mi) immediately afterrefueling to allow the vehicle toadapt to the change in ethanolconcentration.
Because E85 or FlexFuel has lessenergy per liter (gallon) thangasoline, the vehicle will need to berefilled more often. SeeFilling theTa n k0313.
Caution
Some additives are not
compatible with E85 or FlexFuel
and can harm the vehicle's fuel
system. Do not add anything to
E85 or FlexFuel. Damage caused
by additives would not be covered
by the vehicle warranty.
Caution
Do not use fuel containing
methanol. It can corrode metal
parts in the fuel system and also
damage plastic and rubber parts.
That damage would not be
covered under the vehicle
warranty.
Filling the Tank
If the vehicle has a diesel engine,see the Duramax diesel supplementfor more information.
{Warning
Fuel vapors and fuel fires burn
violently and can cause injury or
death.
.To h e l p a v o i d i n j u r i e s t o y o uand others, read and followall the instructions on thefuel pump island.
.Turn off the engine whenrefueling.
.Keep sparks, flames, andsmoking materials awayfrom fuel.
.Do not leave the fuel pumpunattended.
.Do not use a cell phonewhile refueling.
.Do not reenter the vehiclewhile pumping fuel.
.Keep children away fromthe fuel pump and never letchildren pump fuel.
(Continued)