2021 CHEVROLET SILVERADO 2500HD fuel

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
20 Keys, Doors, and Windows
Remote Vehicle Start
If equipped with the remote start feature,
the climate control system will come on
when the vehicle is started remotely,
depending on the outside temperature.
The rear defog and heated and ventilated
seats, if equipped, may also come on. See
Heated and Ventilated Front Seats049 and
Vehicle Personalization 0126.
If equipped, the automatic heated steering
wheel may also come on. See Heated
Steering Wheel 096.
Laws in some communities may restrict the
use of remote starters. Check local
regulations for any requirements on remote
starting of vehicles.
Do not use remote start if the vehicle is low
on fuel. The vehicle may run out of fuel.
The vehicle cannot be remote started if:
.The RKE transmitter is inside the vehicle
or if the key is in the ignition.
.The hood is not closed.
.There is an emission control system
malfunction and the lamp is on.
.The ignition is in any mode other
than off.
.The hazard warning flashers are on.
.Two remote starts or a remote start with
an extension have been used.
.The vehicle is not in P (Park).
The engine will turn off during a remote
vehicle start if:
.The coolant temperature gets too high.
.The oil pressure gets low.
The RKE transmitter range may be reduced
while the vehicle is running.
Other conditions can affect the performance
of the transmitter. See Remote Keyless Entry
(RKE) System 010.
Starting the Engine Using Remote Start
1. Press and release
Q.
2. Immediately press and hold
/until the
turn signal lamps flash or for at least
four seconds.
When the vehicle starts, the parking
lamps will turn on. The doors will be
locked and the climate control system
may come on.
The engine will continue to run for
15 minutes. After 30 seconds, repeat
Steps 1 and 2 for a 15-minute time
extension. Turn the ignition on to operate the vehicle.
Extending Engine Run Time
The engine run time can be extended by
15 minutes, for a total of 30 minutes,
if during the first 15 minutes Steps 1 and 2
are repeated while the engine is still
running. An extension can be requested
30 seconds after starting.
A maximum of two remote starts, or a
single start with an extension, is allowed
between ignition cycles.
The vehicle's ignition must be turned on and
then back off to use remote start again.
Canceling a Remote Start
To cancel a remote start, do one of the
following:.Press and hold/until the parking lamps
turn off.
.Turn on the hazard warning flashers.
.Turn the ignition on and then off.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
38 Keys, Doors, and Windows
The vehicle aerodynamics are designed to
improve fuel economy performance. This
may result in a pulsing sound when either
rear window is down and the front windows
are up. To reduce the sound, open either a
front window or the sunroof, if equipped.
Manual Windows
If equipped, turn the hand crank on each
door to manually raise or lower the manual
windows.
Power Windows
{Warning
Children could be seriously injured or
killed if caught in the path of a closing
window. Never leave the Remote Keyless
Entry (RKE) transmitter or keys in a
vehicle with children. When there are
children in the rear seat, use the
window lockout button to prevent
operation of the windows. SeeKeys (Key
Access) 07or
Keys (Keyless Access) 09.
The power windows work when the ignition
is on, in ACC/ACCESSORY, or when Retained
Accessory Power (RAP) is active. See
Retained Accessory Power (RAP) 0229.
Using the window switch, press to open or
pull to close the window.
The windows may be temporarily disabled if
they are used repeatedly within a
short time.
Window Lockout
With Power Folding Mirrors, Without Similar
This feature stops the rear door passenger
window switches from working except from
the driver position.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
62 Seats and Restraints
Warning (Continued)
vehicle should get out as soon as it is
safe to do so. If you have breathing
problems but cannot get out of the
vehicle after an airbag inflates, then get
fresh air by opening a window or a door.
If you experience breathing problems
following an airbag deployment, you
should seek medical attention.
The vehicle has a feature that may
automatically unlock the doors, turn on the
interior lamps and hazard warning flashers,
and shut off the fuel system after the
airbags inflate. The feature may also
activate, without airbag inflation, after an
event that exceeds a predetermined
threshold. After turning the ignition off and
then on again, the fuel system will return to
normal operation; the doors can be locked,
the interior lamps can be turned off, and
the hazard warning flashers can be turned
off using the controls for those features.
If any of these systems are damaged in the
crash they may not operate as normal.
{Warning
A crash severe enough to inflate the
airbags may have also damaged
important functions in the vehicle, such
as the fuel system, brake and steering
systems, etc. Even if the vehicle appears
to be drivable after a moderate crash,
there may be concealed damage that
could make it difficult to safely operate
the vehicle.
Use caution if you should attempt to
restart the engine after a crash has
occurred.
In many crashes severe enough to inflate
the airbag, windshields are broken by
vehicle deformation. Additional windshield
breakage may also occur from the front
outboard passenger airbag.
.Airbags are designed to inflate only once.
After an airbag inflates, you will need
some new parts for the airbag system.
If you do not get them, the airbag
system will not be there to help protect
you in another crash. A new system will
include airbag modules and possibly other
parts. The service manual for the vehicle
covers the need to replace other parts.
.The vehicle has a crash sensing and
diagnostic module which records
information after a crash. See Vehicle
Data Recording and Privacy 0410 and
Event Data Recorders 0411.
.Let only qualified technicians work on the
airbag systems. Improper service can
mean that an airbag system will not work
properly. See your dealer for service.
Passenger Sensing System
The vehicle has a passenger sensing system
for the front outboard passenger position.
The passenger airbag status indicator will
light on the overhead console when the
vehicle is started.
United States

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
Instruments and Controls 95
Instruments and Controls
Controls
Steering Wheel Adjustment . . . . . . . . . . . . 96
Steering Wheel Controls . . . . . . . . . . . . . . . 96
Heated Steering Wheel . . . . . . . . . . . . . . . . . 96
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Windshield Wiper/Washer . . . . . . . . . . . . . . 97
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Power Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Wireless Charging . . . . . . . . . . . . . . . . . . . . . . 99
Warning Lights, Gauges, and Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . 102
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . 106
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Engine Oil Pressure Gauge . . . . . . . . . . . . . 107
Engine Coolant Temperature Gauge . . . 108
Voltmeter Gauge . . . . . . . . . . . . . . . . . . . . . . 109
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . 109
Airbag Readiness Light . . . . . . . . . . . . . . . . . 110
Passenger Airbag Status Indicator . . . . . . 110
Charging System Light . . . . . . . . . . . . . . . . . 111 Malfunction Indicator Lamp (Check
Engine Light) . . . . . . . . . . . . . . . . . . . . . . . . . 111
Brake System Warning Light . . . . . . . . . . . 113
Electric Parking Brake Light . . . . . . . . . . . . 113
Service Electric Parking Brake Light . . . . . 113
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Four-Wheel-Drive Light . . . . . . . . . . . . . . . . . 114
Tow/Haul Mode Light . . . . . . . . . . . . . . . . . . 114
Hill Descent Control Light . . . . . . . . . . . . . . 114
Lane Departure Warning (LDW) Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Vehicle Ahead Indicator . . . . . . . . . . . . . . . . 115
Traction Off Light . . . . . . . . . . . . . . . . . . . . . . 115
Traction Control System (TCS)/Electronic Stability Control Light . . . . . . . . . . . . . . . . 115
Electronic Stability Control (ESC) Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Engine Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Driver Mode Control Light . . . . . . . . . . . . . 117
Tire Pressure Light . . . . . . . . . . . . . . . . . . . . . 117
Engine Oil Pressure Light (Uplevel Cluster) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Low Fuel Warning Light . . . . . . . . . . . . . . . . 118
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . 118
High-Beam On Light . . . . . . . . . . . . . . . . . . . 118
Front Fog Lamp Light . . . . . . . . . . . . . . . . . . 118
Lamps On Reminder . . . . . . . . . . . . . . . . . . . 118
Cruise Control Light . . . . . . . . . . . . . . . . . . . . 119 Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . 119
Information Displays
Driver Information Center (DIC) (Base
Level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Driver Information Center (DIC) (Midlevel and Uplevel) . . . . . . . . . . . . . . . 120
Head-Up Display (HUD) . . . . . . . . . . . . . . . . 123
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . . . . . . . . . . 125
Engine Power Messages . . . . . . . . . . . . . . . 126
Vehicle Speed Messages . . . . . . . . . . . . . . . 126
Vehicle Personalization
Vehicle Personalization . . . . . . . . . . . . . . . . 126
Universal Remote System
Universal Remote System . . . . . . . . . . . . . . 131
Universal Remote System Programming . . . . . . . . . . . . . . . . . . . . . . . . . 131
Universal Remote System Operation . . . 133

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
102 Instruments and Controls
Warning Lights, Gauges, and
Indicators
Warning lights and gauges can signal that
something is wrong before it becomes
serious enough to cause an expensive repair
or replacement. Paying attention to the
warning lights and gauges could prevent
injury.
Some warning lights come on briefly when
the engine is started to indicate they are
working. When one of the warning lights
comes on and stays on while driving,
or when one of the gauges shows there
may be a problem, check the section that
explains what to do. Waiting to do repairs
can be costly and even dangerous.
Instrument Cluster
Base Cluster English Shown, Metric Similar
1.Tachometer 0106
2. Engine Oil Pressure Gauge 0107
3. Engine Coolant Temperature Gauge
0108
4. Fuel Gauge 0106
5. Voltmeter Gauge 0109
6. Speedometer 0106 7.
Driver Information Center (DIC) (Base
Level) 0119 or
Driver Information Center (DIC)
(Midlevel and Uplevel) 0120

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
Instruments and Controls 103
Midlevel Cluster English Shown, Metric Similar
1.Tachometer 0106
2. Engine Oil Pressure Gauge 0107
3. Engine Coolant Temperature Gauge
0108
4. Fuel Gauge 0106
5. Voltmeter Gauge 0109
6. Speedometer 0106 7.
Driver Information Center (DIC) (Base
Level) 0119 or
Driver Information Center (DIC)
(Midlevel and Uplevel) 0120

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
104 Instruments and Controls
Uplevel Cluster English Standard Shown, Metric Similar
1.Tachometer 0106
2. Engine Oil Pressure Gauge 0107
3. Engine Coolant Temperature Gauge
0108
4. Fuel Gauge 0106
5. Voltmeter Gauge 0109
6. Speedometer 0106 7.
Driver Information Center (DIC) (Base
Level) 0119 or
Driver Information Center (DIC)
(Midlevel and Uplevel) 0120
Cluster Menu (Midlevel and Uplevel)
There is an interactive display area in the
center of the instrument cluster.
Use the right steering wheel control to open
and scroll through the different items and
displays.
Press
SorTto access the cluster
applications. Use the thumbwheel to scroll
through the list of available features. Press
the thumbwheel to select. Not all
applications will be available on all vehicles.
.Home
.Info App. This is where the selected Driver
Information Center (DIC) displays can be
viewed. See Driver Information Center
(DIC) (Base Level) 0119 or
Driver Information Center (DIC) (Midlevel
and Uplevel) 0120.
.Audio

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
Instruments and Controls 105
.Navigation
.Phone
.Options
Home
Information displayed here can be
customized from the Options menu.
Speedometer : Displays how fast the vehicle
is moving in either kilometers per hour
(km/h) or miles per hour (mph).
Speed Sign : Shows sign information, which
comes from a roadway database in the
onboard navigation, if equipped.
Time : Displays the current time.
Fuel Range : Displays 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.
Audio
In the Audio menu, use the thumbwheel to
scroll through options, browse for music,
select from favorites, or change the audio
source. In the main view, scroll to change
the station or go to the next or previous
track. Navigation
In the Navigation menu, if there is no active
route, a compass will be displayed. If there
is an active route, press the thumbwheel to
cancel or resume route guidance, mute or
unmute voice guidance, or access Recents or
Favorites.
Phone
In the Phone menu, if there is no active
phone call, view recent calls, scroll through
contacts, select from the favorites, or change
the phone source. If there is an active call,
mute the phone or switch to handset
operation.
Options
Use the thumbwheel to scroll through items
in the Options menu.
Head-up Display (HUD) :
If equipped, this
feature allows for adjusting the angle of the
HUD image and changing or turning off the
Speed Limit Sign.
HUD Rotation: Press the thumbwheel while
Adjust Rotation is highlighted to enter
Adjust Mode. Scroll to adjust the angle of
the HUD display. Press the thumbwheel to
confirm and save the setting. This feature
may only be available in P (Park). Speed Limit Style: Press the thumbwheel
while Speed Limit Style is highlighted to
change the speed sign style or to turn it off.
Units :
Press the thumbwheel while Units is
displayed to enter the Units menu. Choose
US or metric units by pressing the
thumbwheel while the desired item is
highlighted. A selected mark will be
displayed next to the selected item.
Info Page Options : Press the thumbwheel
while Info Page Options is displayed to
enter and select the items to be displayed
in the Info app. A selected mark will be
displayed next to the selected item.
Home : Press the thumbwheel to select the
available elements to display. Not all
elements will be available on all vehicles:
Speedometer, Speed Sign, Time, and Fuel
Range.
Display (Uplevel) : Press the thumbwheel to
enter the Display menu. Select to turn on or
off the compass or speed sign.
Speed Warning : The Speed Warning display
allows the driver to set a speed that they
do not want to exceed. To set the Speed
Warning, press the thumbwheel when Speed
Warning is displayed, or press the
thumbwheel on the main view to set the