change time CHEVROLET TAHOE 2021 Owner's Manual

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
Seats and Restraints 41
2, orB(Exit) until two beeps sound. To
manually recall these positions, press and
hold 1, 2, or
Buntil the saved position is
reached. Follow the instructions under
“Saving Memory Positions.”
The vehicle identifies the current driver’s
remote key number (1–8). See Remote
Keyless Entry (RKE) System Operation 08.
Only remote keys 1 and 2 can be used for
automatic memory recalls. A Driver
Information Center (DIC) welcome message
indicating the remote key number may
display for the first few ignition cycles
following a remote key change. For Seat
Entry Memory to work properly, save the
positions to the memory button (1 or 2)
matching the remote key number displayed
in the DIC welcome message. Carry the
linked remote key when entering the
vehicle.
Vehicle Personalization Settings
.To have the Seat Entry Memory
movement begin when the vehicle is
started, select the Settings menu, then
Vehicle, then Seating Position, and then
Seat Entry Memory. Select On or Off. See
“Seat Entry Memory” later in this section.
.To begin Seat Exit Memory movement
when the vehicle is turned off and the
driver door is opened, or when the vehicle
is turned off with the driver door already
opened, select the Settings menu, then
Vehicle, then Seating Position, and then
Seat Exit Memory. Select On or Off. See
“Seat Exit Memory”later in this section.
.SeeVehicle Personalization 0124 for
additional setting information.
Identifying Driver Number
To identify the driver number: 1. Move your remote key away from the vehicle.
2. Start the vehicle with another remote key. The DIC should display the driver
number for the other remote key. Turn
the vehicle off and remove the remote
key from the vehicle.
3. Start the vehicle with the initial remote key. The DIC should display the driver
number of your remote key.
Saving Memory Positions
Read these instructions completely before
saving memory positions.
To save preferred driving positions 1 and 2: 1. Turn the vehicle on or to ACC/
ACCESSORY with remote key 1 or 2.
A DIC welcome message may indicate
driver number 1 or 2.
2. Adjust all available memory features to the desired driving position.
3. Press and release SET; a beep will sound.
4. Immediately press and hold the 1 or 2 memory button matching the above
DIC welcome message until two beeps
sound.
If too much time passes between
releasing SET and pressing 1, the
memory position will not be saved and
two beeps will not sound. Repeat
Steps 3 and 4.
1 or 2 corresponds to the driver number.
See “Identifying Driver Number”
previously in this section.
5. Repeat Steps 1–4 for a second driver using 1 or 2. Remote keys 3–8 will not
save memory positions.
To save the position for
Band Seat Exit
Memory features, repeat Steps 1–4 using
B. This saves the position for getting out
of the vehicle.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
Seats and Restraints 43
Obstructions
If something has blocked the driver seat
while recalling a memory position, the recall
may stop. Remove the obstruction and try
the recall again. If the memory position still
does not recall, see your dealer.
Heated and Ventilated Front
Seats
{Warning
If temperature change or pain to the skin
cannot be felt, the seat heater may cause
burns. To reduce the risk of burns, use
care when using the seat heater,
especially for long periods of time. Do
not place anything on the seat that
insulates against heat, such as a blanket,
cushion, cover, or similar item. This may
cause the seat heater to overheat. An
overheated seat heater may cause a burn
or may damage the seat.Heated and Ventilated Seat Buttons Shown,Heated Seat Buttons Similar
If equipped, the buttons are near the
climate controls on the center stack. To
operate, the engine must be on.
Press
Ior+to heat the driver or
passenger seatback.
Press
Jorzto heat the driver or
passenger seatback and cushion.
Press
Cor{, if available, to ventilate the
driver or passenger seat. A ventilated seat
has a fan that pulls or pushes air through
the seat. The air is not cooled. When this feature is off, the heated and
ventilated seat symbols on the buttons are
white. When a heated seat is turned on, the
symbol turns red. When a ventilated seat is
turned on, the symbol turns blue.
Press the button once for the highest
setting. With each press of the button, the
seat will change to the next lower setting,
and then to the off setting. The indicator
lights next to the buttons indicate three for
the highest setting and one for the lowest.
If the heated seats are on high, the level
may automatically be lowered after
approximately 30 minutes.
The passenger seat may take longer to
heat up.
Auto Heated and Ventilated Seats
When the vehicle is on, this feature will
automatically activate the heated or
ventilated seats at the level required by the
vehicle’s interior temperature.
The active high, medium, low, or off heated
or ventilated seat level will be indicated by
the manual heated or ventilated seat
buttons on the center stack. Use the manual
heated or ventilated seat buttons on the
center stack to turn auto heated or
ventilated seats off. If the passenger seat is

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
44 Seats and Restraints
unoccupied, the auto heated or ventilated
seats feature will not activate that seat. The
auto heated or ventilated seats feature can
be programmed to always be enabled when
the vehicle is on.
SeeVehicle Personalization 0124.
Remote Start Heated and Ventilated Seats
During a remote start, the heated or
ventilated seats, if equipped, can be turned
on automatically. When it is cold outside,
the heated seats turn on, and when it is hot
outside the ventilated seats turn on. If the
auto heated or ventilated seats feature,
if equipped, is not turned on, the heated or
ventilated seats may be canceled when the
ignition is turned on. If necessary, press the
heated or ventilated seat button to use the
heated or ventilated seats after the vehicle
is started.
The heated or ventilated seat indicator lights
may turn on during a remote start.
The temperature performance of an
unoccupied seat may be reduced. This is
normal. The remote start heated or ventilated seats
may be enabled or disabled in the vehicle
personalization menu. See
Remote Vehicle
Start 014 and
Vehicle Personalization 0124.
Rear Seats
Rear Seat Reminder
If equipped, the message REAR SEAT
REMINDER LOOK IN REAR SEAT displays
under certain conditions indicating there
may be an item or passenger in the rear
seat. Check before exiting the vehicle.
This feature will activate when a second row
door is opened while the vehicle is on or up
to 10 minutes before the vehicle is turned
on. There will be an alert when the vehicle
is turned off. The alert does not directly
detect objects in the rear seat; instead,
under certain conditions, it detects when a
rear door is opened and closed, indicating
that there may be something in the
rear seat.
The feature is active only once each time
the vehicle is turned on and off, and will
require reactivation by opening and closing
the second row doors. There may be an
alert even when there is nothing in the rear seat; for example, if a child entered the
vehicle through the rear door and left the
vehicle without the vehicle being shut off.
The feature can be turned on or off. See
Vehicle Personalization
0124.
Heated Rear Seats
{Warning
If temperature change or pain to the skin
cannot be felt, the seat heater may cause
burns. See the Warning under Heated
and Ventilated Front Seats 043.
The buttons are on the rear of the center
console.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
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Seats and Restraints 45
With the engine running, pressMorLto
heat the left or right outboard seat cushion.
An indicator on the rear climate control
display appears when this feature is on.
Press the button once for the highest
setting. With each press of the button, the
seat will change to the next lower setting,
and then to the off setting. The indicator
lights next to the buttons indicate three for
the highest setting and one for the lowest.
If the heated seats are on high for an
extended time, their level may automatically
be lowered.Second Row Seats
Rear Seat Adjustment
To adjust the seat position:
1. Remove objects on the floor in front of or on the second row seat, or in the seat
tracks on the floor.
2. Lift the lever below the seat cushion and slide the seat forward or backward.
Reclining Seatbacks
To recline the seatback:
1. Lift the lever on the outboard side ofthe seat.
2. Move the seatback to the desired position, and then release the lever to
lock the seatback in place.
3. Push and pull on the seatback to make sure it is locked.
To return the seatback to the upright
position:

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
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Seats and Restraints 71
{Warning
Never allow a child to wear the seat belt
shoulder belt under both arms or behind
their back. A child can be seriously
injured by not wearing the lap-shoulder
belt properly. In a crash, the child would
not be restrained by the shoulder belt.
The child could move too far forward
increasing the chance of head and neck
injury. The child might also slide under
the lap belt. The belt force would then be
applied right on the abdomen. That could
cause serious or fatal injuries. The
shoulder belt should go over the shoulder
and across the chest.
Infants and Young Children
Everyone in a vehicle needs protection! This
includes infants and all other children.
Neither the distance traveled nor the age
and size of the traveler changes the need,
for everyone, to use safety restraints. In
fact, the law in every state in the United
States and in every Canadian province says
children up to some age must be restrained
while in a vehicle.
{Warning
Children can be seriously injured or
strangled if a shoulder belt is wrapped
around their neck. The shoulder belt can(Continued)
Warning (Continued)
tighten but cannot be loosened if it is
locked. The shoulder belt locks when it is
pulled all the way out of the retractor.
It unlocks when the shoulder belt is
allowed to go all the way back into the
retractor, but it cannot do this if it is
wrapped around a child’s neck. If the
shoulder belt is locked and tightened
around a child’s neck, the only way to
loosen the belt is to cut it.
Never leave children unattended in a
vehicle and never allow children to play
with the seat belts.
Every time infants and young children ride
in vehicles, they should have the protection
provided by appropriate child restraints.
Neither the vehicle’s seat belt system nor its
airbag system is designed for them.
Children who are not restrained properly can
strike other people, or can be thrown out of
the vehicle.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
104 Instruments and Controls
.Info App. This is where the selected Driver
Information Center (DIC) displays can be
viewed. See“Driver Information Center
(DIC) (Uplevel)” in the Index.
.Audio
.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 : If equipped, shows sign
information, which comes from a roadway
database in the onboard navigation,
if equipped.
Temperature : Displays the outside air
temperature.
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.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
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118 Instruments and Controls
High-Beam On Light
This light comes on when the high-beam
headlamps are in use.
SeeHeadlamp High/Low-Beam Changer
0 135.
IntelliBeam Light
This light comes on when the IntelliBeam
system, if equipped, is enabled.
See Exterior Lamp Controls 0133.
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 0133.
Cruise Control Light
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.
See Cruise Control 0251.
Adaptive Cruise Control Light
If equipped, this light is white when the
Adaptive Cruise Control (ACC) is on and
ready, and turns green when the ACC is set
and active. When ACC is engaged and the
driver accelerates, the indicator will turn
blue. See Adaptive Cruise Control (Advanced)
0 253.
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.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
Instruments and Controls 119
Information Displays
Driver Information Center (DIC)
The DIC displays are shown in the center of
the instrument cluster in the Info app. See
Instrument Cluster0102. 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.
yorz: Use the thumbwheel to scroll up
or down in a list. Press the thumbwheel to
open a menu or select a menu item. Press
and hold to reset values on certain screens.
Info Page Options
The info pages on the DIC can be turned on
or off through the Options menu.
1. Press
SorTto 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. 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.
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

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
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120 Instruments and Controls
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.
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
0 315. In addition to the engine oil life
system monitoring the oil life, additional
maintenance is recommended. See
Maintenance Schedule 0386.
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 the engine oil life
system, press the thumbwheel while the Oil
Life display is active. See
Engine Oil Life
System 0316.
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
0 348 and
Tire Pressure Monitor Operation 0349.
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 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 0318.
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 0325.
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.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
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Instruments and Controls 121
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.
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 :If equipped, 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.
Driver Assistance : If equipped, shows
information for Lane Keep Assist (LKA) and
Forward Collision Alert (FCA).
Info Page Options : Scroll to choose which
info pages appear on the DIC. Press the
thumbwheel to select or deselect.
Blank Page : Shows no information.Head-Up Display (HUD)
{Warning
If the HUD image is too bright or too
high in your field of view, it may take
you more time to see things you need to
see when it is dark outside. Be sure to
keep the HUD image dim and placed low
in your field of view.
If equipped with HUD, some information
about the operation of the vehicle is
projected onto the windshield. The image is
projected through the HUD lens on top of
the instrument panel. The information
appears as an image focused out toward the
front of the vehicle.
Caution
If you try to use the HUD image as a
parking aid, you may misjudge the
distance and damage your vehicle. Do not
use the HUD image as a parking aid.
The HUD information can be displayed in
various languages. The speedometer reading
and other numerical values can be displayed
in either English or metric units. The language selection is changed through
the radio, and the units of measurement is
changed through the instrument cluster. See
Settings
0187 and “Options” under
Instrument Cluster 0102.
HUD Display on the Windshield
Depending on how the vehicle is equipped,
the HUD may display some of the following
vehicle information and vehicle messages or
alerts:
.Speed
.Audio
.Phone
.Navigation
.Driver Assistance Features
.Vehicle Messages