2021 CHEVROLET SILVERADO 2500HD oil

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
108 Instruments and Controls
indicates oil pressure outside the normal
operating range, check the vehicle's oil as
soon as possible.
SeeEngine Oil 0305.
Caution
Lack of proper engine oil maintenance
can damage the engine. Driving with the
engine oil low can also damage the
engine. The repairs would not be covered
by the vehicle warranty. Check the oil
level as soon as possible. Add oil if
required, but if the oil level is within the
operating range and the oil pressure is
still low, have the vehicle serviced.
Always follow the maintenance schedule
for changing engine oil.
If the vehicle has a diesel engine, see the
Duramax diesel supplement.
Engine Coolant Temperature
Gauge
Uplevel Metric Shown, Base Level and Midlevel Similar
Uplevel English Shown, Base Level and Midlevel Similar
This gauge measures the temperature of the
vehicle's engine coolant.
While driving under normal operating
conditions, if the needle moves into the red
warning area, the engine is too hot. Pull off
the road, stop the vehicle, and turn off the
engine as soon as possible.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
Instruments and Controls 117
If this happens, pull over and turn off the
engine as soon as possible. SeeEngine
Overheating 0312.
Driver Mode Control Light
This light comes on when Snow/Ice Mode is
selected.
This light comes on when Off-Road Mode is
selected.
See Driver Mode Control 0244.
Tire Pressure Light
For vehicles with the Tire Pressure Monitor
System (TPMS), this light comes on briefly
when the engine is started. It provides
information about tire pressures and
the TPMS.
When the Light Is On Steady
This indicates that one or more of the tires
are significantly underinflated.
A Driver Information Center (DIC) tire
pressure message may also display. Stop as
soon as possible, and inflate the tires to the
pressure value shown on the Tire and
Loading Information label. See Tire Pressure
0 341.
When the Light Flashes First and Then Is On
Steady
If the light flashes for about a minute and
then stays on, there may be a problem with
the TPMS. If the problem is not corrected, the light will come on at every ignition
cycle. See
Tire Pressure Monitor Operation
0 343.
Engine Oil Pressure Light (Uplevel
Cluster)
Caution
Lack of proper engine oil maintenance
can damage the engine. Driving with the
engine oil low can also damage the
engine. The repairs would not be covered
by the vehicle warranty. Check the oil
level as soon as possible. Add oil if
required, but if the oil level is within the
operating range and the oil pressure is
still low, have the vehicle serviced.
Always follow the maintenance schedule
for changing engine oil.
This light should come on briefly as the
engine is started. If it does not come on,
have the vehicle serviced by your dealer.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
118 Instruments and Controls
If the light comes on and stays on, it means
that oil is not flowing through the engine
properly. The vehicle could be low on oil
and might have some other system
problem. See your dealer.
Low Fuel Warning Light
This light is near the fuel gauge and comes
on briefly when the ignition is turned on as
a check to show it is working.
It also comes on when the fuel tank is low
on fuel. The light turns off when fuel is
added. If it does not, have the vehicle
serviced.
Security Light
The security light should come on briefly as
the engine is started. If it does not come on,
have the vehicle serviced by your dealer.
If the system is working normally, the
indicator light turns off.
If the light stays on and the engine does
not start, there could be a problem with the
theft-deterrent system. SeeImmobilizer
Operation 029.
High-Beam On Light
This light comes on when the high-beam
headlamps are in use. See Headlamp High/
Low-Beam Changer 0136.
IntelliBeam Light
This light comes on when the IntelliBeam
system, if equipped, is enabled. See Exterior
Lamp Controls 0134.
Front Fog Lamp Light
For vehicles with fog lamps, this light comes
on when the fog lamps are on.
The light goes out when the fog lamps are
turned off. See Fog Lamps0138.
Lamps On Reminder
This light comes on when the exterior lamps
are in use, except when only the Daytime
Running Lamps (DRL) are active. See Exterior
Lamp Controls 0134.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
Instruments and Controls 119
Cruise Control Light
For vehicles with cruise control, the cruise
control light is white when the cruise
control is on and ready, and turns green
when the cruise control is set and active.
The light turns off when the cruise control is
turned off. SeeCruise Control0246.
Door Ajar Light
This light comes on when a door is open or
not securely latched. Before driving, check
that all doors are properly closed.
Information Displays
Driver Information Center (DIC)
(Base Level)
The DIC displays are shown in the center of
the instrument cluster. The displays show
the status of many vehicle systems. The trip
odometer reset stem in the instrument
cluster is used to access the DIC menu
items.
If the vehicle has a diesel engine, see the
Duramax diesel supplement for more
information.
DIC Menu Items
Turn the trip odometer reset stem to scroll
through the following menu items:
.Digital Speedometer
.Trip 1/2
.Fuel Range
.Tire Pressure
.Remaining Oil Life
.Air Filter Life
.Brake Pad Life Digital Speedometer
The speedometer shows how fast the
vehicle is moving in either kilometers per
hour (km/h) or miles per hour (mph). The
speedometer cannot be reset.
Trip 1 or 2 and Average Fuel Economy
Turn the trip odometer reset stem until TRIP
1 or TRIP 2 displays. The current distance
traveled, in either kilometers (km) or
miles (mi), since the last reset for the trip
odometer is shown, as well as the average
fuel economy. The trip odometer and the
average fuel economy can be reset by
pressing and holding the trip odometer
reset stem.
Fuel Range
This display shows the approximate distance
the vehicle can be driven without refueling.
The fuel range estimate is based on an
average of the vehicle's fuel economy over
recent driving history and the amount of
fuel remaining in the fuel tank. Fuel range
cannot be reset.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
120 Instruments and Controls
Tire Pressure
Turn the trip odometer reset stem until a
vehicle with the approximate pressures of all
four tires displays. Tire pressure is displayed
in either kilopascal (kPa) or in pounds per
square inch (psi).
SeeTire Pressure Monitor System 0342 and
Tire Pressure Monitor Operation 0343.
Remaining Oil Life
Turn the trip odometer reset stem until
REMAINING OIL LIFE displays. An estimate of
the oil's remaining useful life is shown.
REMAINING OIL LIFE 99% means 99% of the
current oil life remains.
When the remaining oil life is low, the
CHANGE ENGINE OIL SOON message will
appear on the display. The oil should be
changed as soon as possible. See Engine Oil
0 305. In addition to the engine oil life
system monitoring the oil life, additional
maintenance is recommended. See
Maintenance Schedule 0384.
The Oil Life display must be reset after each
oil change. It will not reset itself. Do not
reset the Oil Life display at any time other
than when the oil has just been changed. It cannot be reset accurately until the next
oil change. To reset, see
Engine Oil Life
System 0307.
Air Filter Life
Turn the trip odometer reset stem until AIR
FILTER LIFE displays. This displays an
estimate of the engine air filter’s remaining
useful life and the state of the system.
Engine Air Filter Life 95% means 95% of the
current air filter life remains. Messages will
display based on the engine air filter life
and the state of the system.
When the REPLACE AT NEXT OIL CHANGE
message displays, the engine air filter
should be replaced at the time of the next
oil change. When the REPLACE SOON
message displays, the engine air filter
should be replaced at the earliest
convenience.
The Air Filter Life display must be reset after
the engine air filter replacement. To reset,
see Engine Air Filter Life System 0308.
Brake Pad Life
This displays an estimate of the remaining
life of the front and rear brake pads.
Messages will display based on brake pad
wear and the state of the system. Reset the Brake Pad Life display after replacing the
brake pads. See
Brake Pad Life System
0 316.
Driver Information Center (DIC)
(Midlevel and Uplevel)
The DIC displays are shown in the center of
the instrument cluster in the Info app. See
Instrument Cluster 0102. The displays show
the status of many vehicle systems.
If the vehicle has a diesel engine, see the
Duramax diesel supplement.
SorT: Press to move left or right
between the interactive display zones in the
cluster. Press the thumbwheel to select.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
Instruments and Controls 121
yorz:Use the thumbwheel to scroll up
or down in a list. Press the thumbwheel to
select.
Info Page Options
The info pages on the DIC can be turned on
or off through the Options menu.
1. Press
Tto scroll to the Options
application.
2. Scroll
yorzto choose Info pages and
press the thumbwheel.
3. Scroll
yorzto move through the list
of possible information displays.
4. Press the thumbwheel while an item is highlighted to select or deselect
that item.
The info pages can also be turned on or off
through the DIC page Info Page Options.
Info Pages
The following is the list of all possible DIC
info page displays. Some may not be
available for your particular vehicle. Some
items may not be turned on by default but
can be turned on through the Options app.
See “Info Page Options” earlier in this
section. While in the Info Page Options menu, the
info pages can be restored to the default
factory settings by pressing and holding
K
on the left steering wheel controls and the
thumbwheel on the right steering wheel
controls at the same time.
Speed :
Shows the vehicle speed in either
kilometers per hour (km/h) or miles per
hour (mph). The vehicle odometer is also
shown on this page. If equipped, press the
thumbwheel to open the menu and select to
display speed limit signs.
Speed limit signs in your vehicle display
may vary from actual road speed depending
on the version of your current
navigation map.
Trip 1 or Trip 2, and Average Fuel
Economy : Shows the current distance
traveled, in either kilometers (km) or
miles (mi), since the trip odometer was last
reset.
The Average Fuel Economy display shows
the approximate average liters per
100 kilometers (L/100 km), kilometers per
liter (km/L), or miles per gallon (mpg). This
number is calculated based on the value
recorded since the last time this menu item
was reset. This number reflects only the approximate average fuel economy that the
vehicle has right now, and will change as
driving conditions change.
Press the thumbwheel while this display is
active to reset the trip odometer and the
average fuel economy.
Fuel Range :
Shows the approximate
distance the vehicle can be driven without
refueling. LOW will be displayed when the
vehicle is low on fuel. The fuel range
estimate is based on an average of the
vehicle's fuel economy over recent driving
history and the amount of fuel remaining in
the fuel tank.
Timer : This display can be used as a timer.
To start the timer, press the thumbwheel
while this display is active. The display will
show the amount of time that has passed
since the timer was last reset. To stop the
timer, press the thumbwheel briefly while
this display is active and the timer is
running.
Press the thumbwheel while this display is
active to reset the timer.
Oil Life : Shows an estimate of the oil's
remaining useful life. If REMAINING OIL LIFE
99% is displayed, that means 99% of the
current oil life remains.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
122 Instruments and Controls
When the remaining oil life is low, the
CHANGE ENGINE OIL SOON message will
appear on the display. The oil should be
changed as soon as possible. SeeEngine Oil
0 305. In addition to the engine oil life
system monitoring the oil life, additional
maintenance is recommended. See
Maintenance Schedule 0384.
The Oil Life display must be reset after each
oil change. It will not reset itself. Do not
reset the Oil Life display at any time other
than when the oil has just been changed.
It cannot be reset accurately until the next
oil change. To reset, see Engine Oil Life
System 0307.
Tire Pressure : Shows the approximate
pressures of all four tires. Tire pressure is
displayed in either kilopascal (kPa) or in
pounds per square inch (psi). If the pressure
is low, the value for that tire is shown in
amber. See Tire Pressure Monitor System
0 342 and
Tire Pressure Monitor Operation 0343.
Air Filter Life : Shows an estimate of the
engine air filter’s remaining useful life and
the state of the system. Engine Air Filter Life
95% means 95% of the current air filter life
remains. Messages will display based on the
engine air filter life and the state of the system. When the REPLACE AT NEXT OIL
CHANGE message displays, the engine air
filter should be replaced at the time of the
next oil change. When the REPLACE SOON
message displays, the engine air filter
should be replaced at the earliest
convenience.
The Air Filter Life display must be reset after
the engine air filter replacement. To reset,
see
Engine Air Filter Life System 0308.
Brake Pad Life : This displays an estimate of
the remaining life of the front and rear
brake pads. Messages will display based on
brake pad wear and the state of the system.
Reset the Brake Pad Life display after
replacing the brake pads. See Brake Pad Life
System 0316.
Fuel Economy : Displays average fuel
economy, the best fuel economy over the
selected distance, and a bar graph showing
instantaneous fuel economy.
Press the thumbwheel to change the
selected distance. Press and hold the
thumbwheel while this display is active to
reset the best fuel economy and average
fuel economy. This display can also be reset
by selecting reset in the menu. Engine Hours (Hourmeter) :
Shows the total
number of hours the engine has run. This
display also shows the engine idle hours.
Transmission Fluid Temperature : Shows the
temperature of the automatic transmission
fluid in either degrees Celsius (°C) or degrees
Fahrenheit (°F).
Trailer Brake : On vehicles with the
Integrated Trailer Brake Control (ITBC)
system, the trailer brake display appears in
the DIC.
TRAILER GAIN shows the trailer gain setting.
This setting can be adjusted from 0.0 to 10.0
with either a trailer connected or
disconnected.
TRAILER OUTPUT shows the power output to
the trailer any time a trailer with electric
brakes is connected. Output is displayed as a
bar graph. Dotted lines may appear in the
OUTPUT display if a trailer is not connected.
Off Road : Displays vehicle pitch and roll
information, road wheel angle, and
four-wheel drive (4WD) status.
Follow Distance : If equipped, the current
follow time to the vehicle ahead is displayed
as a time value on this page.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
228 Driving and Operating
Starting Procedure
1. For Key Access vehicles, turn the ignitionkey to Start. When the engine starts, let
go of the key. For Keyless Access
vehicles, the RKE transmitter must be in
the vehicle. Press ENGINE START/STOP
with the brake pedal applied. When the
engine begins cranking, let go of the
button.
The driver may observe a minor, and
temporary, brake pedal kickback when
starting the vehicle. This is normal.
The idle speed will go down as the
engine gets warm. Do not race the
engine immediately after starting it.
Operate the engine and transmission
gently to allow the oil to warm up and
lubricate all moving parts.
When the low fuel warning light is on
and the FUEL LEVEL LOW message is
displayed in the Driver Information
Center (DIC), hold the ignition switch in
the START position to continue engine
cranking.Caution
Cranking the engine for long periods of
time, by returning the ignition to the
START position immediately after
cranking has ended, can overheat and
damage the cranking motor, and drain
the battery. Wait at least 15 seconds
between each try, to let the cranking
motor cool down.
2. If the engine does not start after five to 10 seconds, especially in very cold
weather (below −18 °C or 0 °F), it could
be flooded with too much gasoline. Try
pushing the accelerator pedal all the way
to the floor and holding it there while
holding the key in START or ENGINE
START/STOP for up to a maximum of
15 seconds. Wait at least 15 seconds
between each try, to allow the cranking
motor to cool down. When the engine
starts, let go of the key or button and
accelerator. If the vehicle starts briefly
but then stops again, do the same thing.
This clears the extra gasoline from the
engine. Do not race the engine
immediately after starting it. Operate the engine and transmission gently until
the oil warms up and lubricates all
moving parts.
Engine Heater
If equipped, the engine heater can provide
easier starting and better fuel economy
during engine warm-up in cold weather
conditions at or below
−18 °C (0 °F). Vehicles
with an engine heater should be plugged in
at least four hours before starting. An
internal thermostat in the plug-end of the
cord may exist, which will prevent engine
heater operation at temperatures above
−18 °C (0 °F).
{Warning
Do not plug in the engine block heater
while the vehicle is parked in a garage or
under a carport. Property damage or
personal injury may result. Always park
the vehicle in a clear open area away
from buildings or structures.