rear dif CHEVROLET SILVERADO 2018 Owner's Manual

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
24 In Brief
Automatic Transfer Case
This transfer case knob is to the left
of the steering column.
The different drive options that may
be available are described following.
2
m(Two-Wheel Drive High) :This
setting is used for driving in most
street and highway situations.
AUTO (Automatic Four-Wheel
Drive) : This setting is ideal for use
when road surface traction
conditions are variable. Do not use AUTO mode to park on
a steep grade with poor traction
such as ice, snow, mud or gravel. In
AUTO mode only the rear wheels
will hold the vehicle from sliding
when parked. If parking on a steep
grade, use 4
mto keep all four
wheels engaged.
4
m(Four-Wheel Drive High) : Use
this setting when extra traction is
needed, such as on snowy or icy
roads or in most off-road situations.
N (Neutral) : Shift to this setting
only when towing the vehicle.
See Recreational Vehicle Towing
0 425 orTrailer Towing 0300.
4
n(Four-Wheel Drive Low) : This
setting sends maximum power to all
four wheels. Choose 4
nwhen
driving in deep sand, mud, or snow,
and while climbing or descending
steep hills.
See Four-Wheel Drive 0265.
Vehicle Features
Infotainment System
The base radio information is
included in this manual. See the
infotainment manual for information
on the uplevel radios, audio players,
phone, navigation system, Rear
Seat Entertainment (RSE), and
voice or speech recognition,
if equipped.
Radio(s)
Base Radio
O:Press to turn the system on.
Press and hold to turn it off. When
on, press to mute; press again to
unmute. Turn to increase or
decrease the volume.
{: Press to go to the Home Page.
7:Press to seek the previous
station or track.
6: Press to seek the next station
or track.
See Overview 0183.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
80 Seats and Restraints
Warning (Continued)
that person causing severe injury
or even death. The path of an
inflating airbag must be kept
clear. Do not put anything
between an occupant and an
airbag, and do not attach or put
anything on the steering wheel
hub or on or near any other
airbag covering.
Do not use seat accessories that
block the inflation path of a
seat-mounted side impact airbag.
Never secure anything to the roof
of a vehicle with roof-rail airbags
by routing a rope or tie‐down
through any door or window
opening. If you do, the path of an
inflating roof-rail airbag will be
blocked.
When Should an Airbag
Inflate?
This vehicle is equipped with
airbags. SeeAirbag System 077.
Airbags are designed to inflate if the
impact exceeds the specific airbag
system's deployment threshold.
Deployment thresholds are used to
predict how severe a crash is likely
to be in time for the airbags to
inflate and help restrain the
occupants. The vehicle has
electronic sensors which help the
airbag system determine the
severity of the impact. Deployment
thresholds can vary with specific
vehicle design.
Frontal airbags are designed to
inflate in moderate to severe frontal
or near frontal crashes to help
reduce the potential for severe
injuries, mainly to the driver's or
front outboard passenger's head
and chest.
Whether the frontal airbags will or
should inflate is not based primarily
on how fast the vehicle is traveling. It depends on what is hit, the
direction of the impact, and how
quickly the vehicle slows down.
Frontal airbags may inflate at
different crash speeds depending on
whether the vehicle hits an object
straight on or at an angle, and
whether the object is fixed or
moving, rigid or deformable, narrow
or wide.
Frontal airbags are not intended to
inflate during vehicle rollovers, in
rear impacts, or in many side
impacts.
In addition, if the GVWR (Gross
Vehicle Weight Rating) is at or
below 3 855 kg (8,500 lb), the
vehicle has advanced technology
frontal airbags. You can find the
GVWR on the Certification/Tire label
on the center pillar of the vehicle.
See
Vehicle Load Limits 0239 for
more information.
Advanced technology frontal airbags
adjust the restraint according to
crash severity. Vehicles with
advanced technology frontal airbags
have a seat position sensor that

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
Seats and Restraints 95
Warning (Continued)
infant will suddenly become a
110 kg (240 lb) force on a person's
arms. An infant or child should be
secured in an appropriate
restraint.
{Warning
Children who are up against,
or very close to, any airbag when
it inflates can be seriously injured(Continued)
Warning (Continued)
or killed. Never put a rear-facing
child restraint in the front
outboard seat. Secure a
rear-facing child restraint in a rear
seat. It is also better to secure a
forward-facing child restraint in a
rear seat. If you must secure a
forward-facing child restraint in
the front outboard seat, always
move the front passenger seat as
far back as it will go.
Child restraints are devices used to
restrain, seat, or position children in
the vehicle and are sometimes
called child seats or car seats.
There are three basic types of
child restraints:
.Forward-facing child restraints
. Rearward-facing child restraints
. Belt-positioning booster seats
The proper child restraint for your
child depends on their size, weight,
and age, and also on whether the
child restraint is compatible with the
vehicle in which it will be used.
For each type of child restraint,
there are many different models
available. When purchasing a child
restraint, be sure it is designed to be
used in a motor vehicle. If it is, the
restraint will have a label saying that
it meets federal motor vehicle safety
standards. The restraint
manufacturer's instructions that
come with the restraint state the
weight and height limitations for a
particular child restraint. In addition,

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
Driving and Operating 257
Running the Vehicle
While Parked
It is better not to park with the
engine running.
If the vehicle is left with the engine
running, follow the proper steps to
be sure the vehicle will not move.
SeeShifting Into Park 0253 and
Engine Exhaust 0256. If the vehicle
has a manual transmission, see
Parking (Manual Transmission)
0 255.
If parking on a hill and pulling a
trailer, see Driving Characteristics
and Towing Tips 0296.
Automatic
Transmission
If equipped, there is an electronic
shift lever position indicator within
the instrument cluster. This display
comes on when the ignition key is
turned on.
There are several different positions
for the shift lever.
Heavy-Duty 6-Speed Automatic
Transmission Shown, Others
Similar
See “Range Selection Mode” under
Manual Mode 0260.
P : This position locks the rear
wheels. Use P (Park) when starting
the engine because the vehicle
cannot move easily. When parked on a hill, especially
when the vehicle has a heavy load,
you might notice an increase in the
effort to shift out of P (Park). See
“Torque Lock”
underShifting Into
Park 0253
{Warning
It is dangerous to get out of the
vehicle if the shift lever is not fully
in P (Park) with the parking brake
firmly set. The vehicle can roll.
Do not leave the vehicle when the
engine is running. If you have left
the engine running, the vehicle
can move suddenly. You or others
could be injured. To be sure the
vehicle will not move, even when
you are on fairly level ground,
always set the parking brake and
move the shift lever to P (Park).
See Shifting Into Park 0253 and
Driving Characteristics and
Towing Tips 0296.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
Driving and Operating 283
1. View Displayed by theCamera
1. View Displayed by theCamera
2. Corners of the Rear Bumper
Displayed images may be farther or
closer than they appear. The area
displayed is limited and objects that
are close to either corner of the
bumper or under the bumper do not
display.
A warning triangle may display on
the infotainment display to show
that RPA has detected an object.
This triangle changes from amber to
red and increases in size the closer
the object.
{Warning
The camera(s) do not display
children, pedestrians, bicyclists,
crossing traffic, animals, or any
other object outside of the
cameras’ field of view, below the
bumper, or under the vehicle.
Shown distances may be different
from actual distances. Do not
drive or park the vehicle using
only these camera(s). Always
check behind and around the
(Continued)
Warning (Continued)
vehicle before driving. Failure to
use proper care may result in
injury, death, or vehicle damage.
Parking Assist
With RPA, and if equipped with FPA,
as the vehicle moves at speeds of
less than 8 km/h (5 mph) the
sensors on the bumpers may detect
objects up to 2.5 m (8 ft) behind and
1.2 m (4 ft) in front of the vehicle
within a zone 25 cm (10 in) high off
the ground and below bumper level.
These detection distances may be
shorter during warmer or humid
weather. Blocked sensors will not
detect objects and can also cause
false detections. Keep the sensors
clean of mud, dirt, snow, ice, and
slush; and clean sensors after a car
wash in freezing temperatures.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
Driving and Operating 331
.Make sure the weight on the
front and rear axles does not
exceed the axle rating for each.
. For the front axle, if more cargo
or passengers must be carried,
appropriate counter ballast must
be installed rear of the rear axle.
Counter ballast must be properly
secured so it will not move
during driving.
. Rear ballast may be required to
ensure a proper front and rear
weight distribution ratio, even
though the actual weight at the
front axle may be less than the
front axle rating.
. The snow plow manufacturer or
installer can assist in
determining the amount of rear
ballast required, to help make
sure the snow plow/vehicle
combination does not exceed
the GVW rating, the front and
rear axle ratings, and the front
and rear weight distribution ratio.
. The total vehicle must not
exceed the GVW rating. Front axle reserve capacity is the
difference between the Gross Axle
Weight Rating (GAWR) and the front
axle weight of the vehicle with full
fuel and passengers. This is the
amount of weight that can be added
to the front axle before reaching the
front GAWR.
United States
Canada
The front axle reserve capacity for
the vehicle is in the lower right
corner of the Certification/Tire label.
To calculate the amount of weight
any front accessory, such as a snow
plow, is adding to the front axle, use
this formula:

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
332 Driving and Operating
(W x (A + W.B.)) /W.B.= Weight the
accessory is adding to the
front axle.
Where:W = Weight of added accessory
A = Distance that the accessory
is in front of the front axle
W.B. = Vehicle Wheelbase
For example, adding a 318 kg
(700 lb) snow plow actually adds
more than 318 kg (700 lb) to the
front axle. Using the formula, if the
snow plow is 122 cm (4 ft) in front of
the front axle and the wheelbase is
305 cm (10 ft), then: W = 318 kg (700 lb)
A = 122 cm (4 ft) W.B. = 305 cm (10 ft)
(W x (A + W.B.)/W.B. =
(318 x (122 + 305))/305 = 445 kg
(980 lb)
This means if the front axle reserve
capacity is more than 445 kg
(980 lb), the snow plow could be
added without exceeding the
front GAWR.
Heavier equipment can be added on
the front of the vehicle if less cargo
or fewer passengers are carried,
or by positioning cargo toward the
rear. This reduces the load on the
front. However, the front GAWR,
rear GAWR, and Gross Vehicle
Weight Rating (GVWR) must never
be exceeded.
{Warning
On some vehicles that have
certain front mounted equipment,
such as a snow plow, it may be
possible to load the front axle to
the front Gross Axle Weight
Rating (GAWR) but not have (Continued)
Warning (Continued)
enough weight on the rear axle to
have proper braking performance.
If the brakes cannot work
properly, the vehice could crash.
Always follow the snow plow
manufacturer or installer's
recommendation for rear ballast
to ensure a proper front and rear
weight distribution ratio.
Maintaining a proper front and
rear weight distribution ratio is
necessary to provide proper
braking performance.
Total vehicle reserve capacity is the
difference between the GVWR and
the weight of the truck with full fuel
and passengers. It is the amount of
weight that can be added to the
vehicle before reaching the GVWR.
Reserve capacity numbers are
intended as a guide when selecting
the amount of equipment or cargo
the truck can carry. If unsure of the
vehicle's front, rear, or total weight,

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
334 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . 335
California Proposition65 Warning . . . . . . . . . . . . . . . . . 336
California Perchlorate Materials Requirements . . . . . 336
Accessories and Modifications . . . . . . . . . . . . . . . . 336
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 337
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 337
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 338
Engine Oil . . . . . . . . . . . . . . . . . . . . 343
Engine Oil Life System . . . . . . . 346
Automatic Transmission Fluid (6-Speed Transmission) . . . . . 347
Automatic Transmission Fluid (8-Speed Transmission) . . . . . 350
Manual Transmission Fluid . . . 350
Hydraulic Clutch . . . . . . . . . . . . . . 351
Engine Air Cleaner/Filter . . . . . . 351
Cooling System . . . . . . . . . . . . . . 352
Engine Overheating . . . . . . . . . . 356 Overheated Engine Protection
Operating Mode . . . . . . . . . . . . . 358
Engine Fan . . . . . . . . . . . . . . . . . . . 358
Power Steering Fluid (1500 Series) . . . . . . . . . . . . . . . . . . . . . . 359
Power Steering Fluid (2500/ 3500 Series) . . . . . . . . . . . . . . . . 359
Washer Fluid . . . . . . . . . . . . . . . . . 359
Brakes . . . . . . . . . . . . . . . . . . . . . . . 360
Brake Fluid . . . . . . . . . . . . . . . . . . . 361
Battery - North America . . . . . . 362
Four-Wheel Drive . . . . . . . . . . . . . 363
Front Axle . . . . . . . . . . . . . . . . . . . . 364
Rear Axle . . . . . . . . . . . . . . . . . . . . 365
Noise Control System . . . . . . . . 366
Starter Switch Check . . . . . . . . . 367
Automatic Transmission Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 368
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . 368
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 368
Wiper Blade Replacement . . . . 369
Windshield Replacement . . . . . 369
Gas Strut(s) . . . . . . . . . . . . . . . . . . 370
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 371
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 371
Halogen Bulbs . . . . . . . . . . . . . . . . 371
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 371
LED Lighting . . . . . . . . . . . . . . . . . 371
Headlamps, Front Turn Signal,
Sidemarker, and Parking
Lamps . . . . . . . . . . . . . . . . . . . . . . 372
Fog Lamps . . . . . . . . . . . . . . . . . . . 373
Taillamps (Chassis Cab Models) . . . . . . . . . . . . . . . . . . . . . 373
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 373
Center High-Mounted Stoplamp (CHMSL) and
Cargo Lamp . . . . . . . . . . . . . . . . . 375
Electrical System
High Voltage Devices andWiring . . . . . . . . . . . . . . . . . . . . . . . 375
Electrical System Overload . . . 375
Fuses and Circuit Breakers . . . 376
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 376
Instrument Panel Fuse Block (Right) . . . . . . . . . . . . . . . . . . . . . . 380
Instrument Panel Fuse Block (Left) . . . . . . . . . . . . . . . . . 381

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
Vehicle Care 365
What to Use
Refer toRecommended Fluids and
Lubricants 0451 to determine what
kind of lubricant to use.
Rear Axle
When to Check Lubricant
It is not necessary to regularly
check rear axle fluid unless a leak is
suspected or an unusual noise is
heard. A fluid loss could indicate a
problem. Have it inspected and
repaired.
All axle assemblies are filled by
volume of fluid during production.
They are not filled to reach a certain
level. When checking the fluid level
on any axle, variations in the
readings can be caused by factory
fill differences between the minimum
and the maximum fluid volume.
Also, if a vehicle has just been
driven before checking the fluid
level, it may appear lower than
normal because fluid has traveled
out along the axle tubes and has
not drained back to the sump area.
Therefore, a reading taken five minutes after the vehicle has
been driven will appear to have a
lower fluid level than a vehicle that
has been stationary for an hour or
two. The rear axle assembly must
be supported on a flat, level surface
to get a true reading.
How to Check Lubricant
2500HD with 6.0L
All Other Series and Engines
To get an accurate reading, the
vehicle should be on a level
surface.
. For all 4.3L and 5.3L 1500
Series applications, the proper
level is 1.0 mm to 19.0 mm
(0.04 in to 0.7 in) below the
bottom of the fill hole, located on
the rear axle. Add only enough
fluid to reach the proper level.
. For 6.2L 1500 Series
applications, the proper level is
from 15 mm to 40 mm (0.6 in to
1.6 in) below the bottom of the

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349200) - 2018 - CRC - 2/27/18
496 Index
RoofSunroof . . . . . . . . . . . . . . . . . . . . . . . . . 55
Rotation, Tires . . . . . . . . . . . . . . . . . . 400
Routing, Engine Drive Belt . . . . . . 460
Running the Vehicle While Parked . . . . . . . . . . . . . . . . . . . . . . . . 257
S
Safety Defects ReportingCanadian Government . . . . . . . . 472
General Motors . . . . . . . . . . . . . . . 473
U.S. Government . . . . . . . . . . . . . 472
Safety Locks . . . . . . . . . . . . . . . . . . . . . 42
Safety System Check . . . . . . . . . . . . 75
Satellite Radio . . . . . . . . . . . . . . . . . . 187
Scheduling Appointments . . . . . . . 467
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . 69 Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Extender . . . . . . . . . . . . . . . . . . . . . . . . 75
How to Wear Seat BeltsProperly . . . . . . . . . . . . . . . . . . . . . . . 70
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . . 75
Lap-Shoulder Belt . . . . . . . . . . . . . . 71
Reminders . . . . . . . . . . . . . . . . . . . . 143
Replacing after a Crash . . . . . . . . 76
Use During Pregnancy . . . . . . . . . . 74
Seats Adjustment, Front . . . . . . . . . . . . . . . 59 Seats (cont'd)
Center Seat . . . . . . . . . . . . . . . . . . . . 59
Head Restraints . . . . . . . . . . . . . . . . 58
Heated and Ventilated Front . . . . 65
Lumbar Adjustment, Front . . . . . . 60
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 62
Power Adjustment, Front . . . . . . . 60
Rear . . . . . . . . . . . . . . . . . . . . . . . . 66, 68
Reclining Seatbacks . . . . . . . . . . . . 61
Securing Child Restraints . . . . . . . . . . . 111, 114, 115
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . 153
OnStar . . . . . . . . . . . . . . . . . . . . . . . 477
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 44
Vehicle Alarm . . . . . . . . . . . . . . . . . . . 44
Service . . . . . . . . . . . . . . . . . . . . . . . . . 225 Accessories and
Modifications . . . . . . . . . . . . . . . . 336
Climate Control System . . . . . . . . . . . . . . . . . 216, 218
Doing Your Own Work . . . . . . . . 337
Maintenance Records . . . . . . . . 455
Maintenance, General Information . . . . . . . . . . . . . . . . . . 441
Parts Identification Label . . . . . 456
Publications Ordering Information . . . . . . . . . . . . . . . . . . 470 Service (cont'd)
Scheduling Appointments . . . . . 467
Services Special Application . . . . . . . . . . . 448
Servicing the Airbag . . . . . . . . . . . . . 90
Shift Lock Control Function Check, Automatic
Transmission . . . . . . . . . . . . . . . . . . 368
Shifting
Into Park . . . . . . . . . . . . . . . . . . . . . . 253
Out of Park . . . . . . . . . . . . . . . . . . . 255
Signals, Turn and Lane-Change . . . . . . . . . . . . . . . . . 175
Snow Plow . . . . . . . . . . . . . . . . . . . . . 330
Software Updates . . . . . . . . . . . . . . 185
Special Application Services . . . . 448
Specifications and Capacities . . . . . . . . . . . . . . . . . . . . . 457
Speedometer . . . . . . . . . . . . . . . . . . . 140
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . . . 152
Start Assist, Hill . . . . . . . . . . . . . . . . . 275
Start Vehicle, Remote . . . . . . . . . . . 39
Starter Switch Check . . . . . . . . . . . 367
Starting the Engine . . . . . . . . . . . . . 249
Steering . . . . . . . . . . . . . . . . . . . . . . . . 229 Fluid, Power . . . . . . . . . . . . . . . . . . 359
Heated Wheel . . . . . . . . . . . . . . . . 130