ECU CHEVROLET TRAILBLAZER 2021 Owner's Guide

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
76 Seats and Restraints
4. Push the latch plate into the buckle untilit clicks.
Position the release button on the
buckle, away from the child restraint, so
that the seat belt could be quickly
unbuckled if necessary.5. Pull the shoulder belt all the way out ofthe retractor to set the lock. When the
retractor lock is set, the belt can be
tightened but not pulled out of the
retractor.
6. To tighten the belt, push down on thechild restraint, pull the shoulder portion
of the belt to tighten the lap portion of
the belt, and feed the shoulder belt back
into the retractor. When installing a
forward-facing child restraint, it may be
helpful to use your knee to push down
on the child restraint as you tighten
the belt.
Try to pull the belt out of the retractor
to make sure the retractor is locked.
If the retractor is not locked, repeat
Steps 5 and 6.
7. Before placing a child in the child restraint, make sure it is securely held in
place. To check, grasp the child restraint
at the seat belt path and attempt to
move it side to side and back and forth.
When the child restraint is properly
installed, there should be no more than
2.5 cm (1 in) of movement.
If the airbags are off, the OFF indicator in
the passenger airbag status indicator will
come on and stay on when the vehicle is
started.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
80 Storage
Cargo Management System
Lift the load floor to access the cargo
management system.
After storing items, make sure to properly
secure the load floor.
The Cargo Management System has a height
adjustment. Place the load floor on the
holders.
To access the spare tire, lift the load floor
and place it into the load floor holding slots.
SeeTire Changing 0297.
Roof Rack System
{
Warning
If something is carried on top of the
vehicle that is longer or wider than the
roof rack—like paneling, plywood, or
a mattress —the wind can catch it while
the vehicle is being driven. The item
(Continued)
Warning (Continued)
being carried could be violently torn off,
and this could cause a collision and
damage the vehicle. Never carry
something longer or wider than the roof
rack on top of the vehicle unless using a
GM certified accessory carrier.
If equipped, the roof rack can be used to
load items. For roof racks that do not have
crossrails included, GM certified crossrails
can be purchased as an accessory. See your
dealer.
Caution
Loading cargo on the roof rack that
weighs more than 75 kg (165 lb) or hangs
over the rear or sides of the vehicle may
damage the vehicle. Do not load cargo
exceeding 75 kg (165 lbs) and always load
cargo so that it rests evenly between the
crossrails and does not block the vehicle
lamps or windows. Fasten the cargo
securely.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
Storage 81
To prevent damage or loss of cargo when
driving, check to make sure crossrails and
cargo are securely fastened. Loading cargo
on the roof rack will make the vehicle’s
center of gravity higher. Avoid high speeds,
sudden starts, sharp turns, sudden braking,
or abrupt maneuvers; otherwise it may
result in loss of control. If driving for a long
distance, on rough roads, or at high speeds,
occasionally stop the vehicle to make sure
the cargo remains in its place. Do not
exceed the maximum vehicle capacity when
loading the vehicle. For more information
on vehicle capacity and loading, seeVehicle
Load Limits 0187.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
82 Instruments and Controls
Instruments and Controls
Controls
Steering Wheel Adjustment . . . . . . . . . . . . 83
Steering Wheel Controls . . . . . . . . . . . . . . . . 83
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Windshield Wiper/Washer . . . . . . . . . . . . . . 83
Rear Window Wiper/Washer . . . . . . . . . . . 84
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Power Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Wireless Charging . . . . . . . . . . . . . . . . . . . . . . 86
Warning Lights, Gauges, and Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . 89
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . 93
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Engine Coolant Temperature Gauge . . . . 94
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . . 94
Airbag Readiness Light . . . . . . . . . . . . . . . . . 95
Passenger Airbag Status Indicator . . . . . . 95
Charging System Light . . . . . . . . . . . . . . . . . 96
Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . . . . . . . . . . . . . . . . . . 96 Brake System Warning Light . . . . . . . . . . . 98
Electric Parking Brake Light . . . . . . . . . . . . . 98
Service Electric Parking Brake Light . . . . . 99
Antilock Brake System (ABS) Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
All-Wheel-Drive Light . . . . . . . . . . . . . . . . . . . 99
Sport Mode Light . . . . . . . . . . . . . . . . . . . . . 100
Lane Keep Assist (LKA) Light . . . . . . . . . . 100
Vehicle Ahead Indicator . . . . . . . . . . . . . . . 100
Pedestrian Ahead Indicator . . . . . . . . . . . . 100
Traction Off Light . . . . . . . . . . . . . . . . . . . . . 100
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . 101
Traction Control System (TCS)/ StabiliTrak Light . . . . . . . . . . . . . . . . . . . . . . 101
Tire Pressure Light . . . . . . . . . . . . . . . . . . . . . 101
Engine Oil Pressure Light . . . . . . . . . . . . . . 102
Low Fuel Warning Light . . . . . . . . . . . . . . . 102
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . 102
High-Beam On Light . . . . . . . . . . . . . . . . . . . 103
Front Fog Lamp Light . . . . . . . . . . . . . . . . . . 103
Lamps On Reminder . . . . . . . . . . . . . . . . . . . 103
Cruise Control Light . . . . . . . . . . . . . . . . . . . 103
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . 104
Information Displays
Driver Information Center (DIC) (Base Level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Driver Information Center (DIC) (Uplevel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . . . . . . . . . 109
Engine Power Messages . . . . . . . . . . . . . . . 110
Vehicle Speed Messages . . . . . . . . . . . . . . . 110
Vehicle Personalization
Vehicle Personalization . . . . . . . . . . . . . . . . . 110

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
102 Instruments and Controls
pressure value shown on the Tire and
Loading Information label. SeeTire Pressure
0 285.
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
0 287.
Engine Oil Pressure Light
Oil pressure can vary with engine speed,
outside temperature, and oil viscosity.
On some models, the oil pump will vary
engine oil pressure according to engine
needs. Oil pressure may change quickly as
the engine speed or load varies. This is
normal. If the oil pressure warning light or
Driver Information Center (DIC) message
indicates oil pressure outside the normal
operating range, check the vehicle's oil as
soon as possible.
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.
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.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
104 Instruments and Controls
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 information about your
vehicle. It also displays warning messages if
a system problem is detected. SeeVehicle
Messages 0109. All messages appear in the
DIC display in the center of the instrument
cluster.
DIC Operation and Displays
.TRIP
.VEHICLE
.ECO
Some of the displayed functions differ
between vehicle driving and standstill and
some functions are only active when the
vehicle is driving. See Vehicle Personalization
0 110.
< Type 1 >
The DIC has different displays which can be
accessed by using the DIC buttons on the
turn signal lever.
DIC Buttons
1.
l: Press to set, or press and hold to
clear, the menu item displayed.
2.
m: Use the band to scroll through the
items in each menu.
3. SELECT : Press to access the cluster
applications. This button is also used to
return to or exit the last screen displayed on
the DIC.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
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Instruments and Controls 109
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,
seeEngine Air Filter Life System 0253.
Fuel Economy : Displays average fuel
economy, the best fuel economy over the
selected distance, and a bar graph showing
instantaneous fuel economy.
Following Distance : When Adaptive Cruise
Control (ACC) is not engaged, the current
follow time to the vehicle ahead is displayed
as a time value on this page.
If equipped and when ACC has been
engaged, the display switches to the gap
setting page.
This page shows the current gap setting
along with the vehicle ahead indicator.
Driver Assistance : Displays the states of all
active safety systems.
Top Consumers : List of top comfort
consumers currently switched on is
displayed in descending order. Fuel saving
potential is indicated. During sporadic driving conditions, the
engine will activate the heated rear window
automatically. In this event, the heated rear
window is indicated as one of the top
consumers, without activation by the driver.
Economy Trend :
Shows history of the
Average Fuel Economy from the last 50 km
(30 mi). Each bar represents about 5 km
(3 mi) of driving. During driving the bars will
shift to always reflect the most recent
distance on the right side. Press and hold
the center toggle switch to clear the graph
or press
pto reset through the menu.
ECO Index : Provides feedback on the
efficiency of current driving behavior. The
bar graph shows a value that is based on
current fuel consumption compared to what
is expected from the vehicle with good and
bad driving habits.
Vehicle Messages
Messages displayed on the DIC indicate the
status of the vehicle or some action that
may be needed to correct a condition.
Multiple messages may appear one after
another. The messages that do not require
immediate action can be acknowledged and
cleared by pressing
V. The messages that
require immediate action cannot be cleared
until that action is performed.
All messages should be taken seriously;
clearing the message does not correct the
problem.
If a SERVICE message appears, see your
dealer.
Follow the instructions given in the
messages. The system displays messages
regarding the following topics:
.Service Messages
.Fluid Levels
.Vehicle Security
.Brakes
.Steering
.Ride Control Systems
.Driver Assistance Systems
.Cruise Control
.Lighting and Bulb Replacement
.Wiper/Washer Systems
.Doors and Windows
.Seat Belts
.Airbag Systems

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
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160 Infotainment System
To manually check for updates, touch
Settings on the Home Page, followed by
Software Information, and then System
Update. Follow the on-screen prompts. The
steps to check for, download and install
updates may vary by vehicle.
Downloading Over-the-Air vehicle software
updates requires internet connectivity, which
can be accessed through the vehicle’s
built-in 4G LTE connection, if equipped and
active. If required, data plans are provided
by a third party. Optionally, a secure Wi-Fi
hotspot such as a compatible mobile device
hotspot, home hotspot or public hotspot can
be used. Applicable data rates may apply.
To connect the infotainment system to a
secured mobile device hotspot, home
hotspot, or a public hotspot, touch Settings
on the Home Page, select the System tab,
followed by Wi-Fi Networks. Select the
appropriate Wi-Fi network, and follow the
on-screen prompts.
Download speeds may vary. On most
compatible mobile devices, activation of the
Wi-Fi hotspot is in the Settings menu under
Mobile Network Sharing, Personal Hotspot,
Mobile Hotspot or similar. Availability ofOver-the-Air software updates varies by
vehicle and country. For more information
on this feature, see my.chevrolet.com/learn.
Preferences
Touch the controls on the infotainment
display to disable or enable the download of
new updates in the background.
About
Touch to view the infotainment system
software information.
Running Applications
If equipped, touch to see a complete list of
applications that are currently running on
the infotainment system.
Return to Factory Settings
Touch and the following may display:
.Reset Vehicle Settings: Resets all vehicle
settings for the current user.
Touch Reset or Cancel.
.Erase Settings and Personal Data: Erases
app data settings, user profiles, and
personal data including mobile
device data.
Touch Erase or Cancel.
.Clear Default Applications: Resets
preferred applications that have been set
to open when selecting a function. No
application data will be lost.
Touch Clear or Cancel.
Apps
The menu may contain the following:
Android Auto
This feature allows you to interact directly
with your mobile device on the infotainment
display. See
Apple CarPlay and Android Auto
0 156.
Touch Off or On.
Apple CarPlay
This feature allows you to interact directly
with your mobile device on the infotainment
display. See Apple CarPlay and Android Auto
0 156.
Touch Off or On.
Apps
Touch and the following may display:
.Update Apps Automatically: This allows
downloaded applications to be updated
automatically.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
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162 Infotainment System
Phone
Touch and the following may display:
.My Number: Displays the cell phone
number of the Bluetooth connected
device.
.Active Call View: Shows active call display
when answering a call.
Touch the controls on the infotainment
display to disable or enable.
.Privacy : Only show call alerts in cluster.
.Sort Contacts: Touch to sort by first or
last name.
.Re-sync phone Contacts: This allows the
device contacts to re-sync if you are
having difficulty accessing all of the
contacts on your cell phone.
OnStar Phone TTY Mode: This enables
OnStar cell phone TTY mode.
Touch Disable or Enable.
Vehicle
This menu allows adjustment of different
vehicle features. SeeVehicle Personalization
0 110.
Personal
If equipped, this menu allows adjustment of
different user profile settings. See “Users”in
Using the System 0124 for information on
setting up user profiles.
The menu may contain the following:
Name
Touch to edit your user name that will be
displayed in the vehicle.
Vehicle Account Information
Touch to view the vehicle account
information and to change the account
password.
An “unverified user account” pop-up will
display until the account information
verification process has been completed on
the Internet. Check your registered e-mail
account for an activation e-mail to complete
the verification process.
Profile Picture
Touch to choose or change your profile
picture.
Profile Identifiers
Touch to have the vehicle recognize the
identifier you choose. Touch Vehicle Key 1 and/or Vehicle Key 2.
If the Remote Keyless Entry (RKE)
transmitter is lost or stolen, see your dealer.
Security
Touch to have your profile secured with
a PIN.
Touch No or Yes.
Vehicle Name
Touch to edit your vehicle name.
Vehicle Account
Touch to view the vehicle account
information and to change the account
password.
Remove Profile
Touch to remove the profile from the
vehicle.
Touch Remove or Cancel.
Teen Driver
If equipped, this allows multiple keys to be
registered for beginner drivers to encourage
safe driving habits. When the vehicle is
started with a Teen Driver key, it will
automatically activate certain safety
systems, allow setting of some features, and

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
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Infotainment System 165
Report Card
The vehicle owner must secure the driver’s
consent to record certain vehicle data when
the vehicle is driven with a registered Teen
Driver key. There is one Report Card per
vehicle. Data is only recorded when a
registered Teen Driver key is used to
operate the vehicle.
The Report Card data is collected from the
time Teen Driver is activated or the last
time the Report Card was reset. The
following items may be recorded:
.Distance Driven–the total distance
driven.
.Maximum Speed –the maximum vehicle
speed detected.
.Overspeed Warnings –the number of
times the speed warning setting was
exceeded.
.Wide Open Throttle –the number of
times the accelerator pedal was pressed
nearly all the way down.
.Forward Collision Alerts –the number of
times the driver was notified when
approaching a vehicle ahead too quickly
and at potential risk for a crash.
.Automatic Emergency Braking (if
equipped) –the number of times the
vehicle detected that a forward collision
was imminent and applied the brakes.
.Traction Control –the number of times
the Traction Control System activated to
reduce wheel spin or loss of traction.
.Stability Control –the number of events
which required the use of electronic
stability control.
.Antilock Braking System Active –The
number of Antilock Brake System
activations.
.Tailgating Alerts –the number of times
the driver was alerted for following a
vehicle ahead too closely.
Report Card Data
Cumulative Data is saved for all trips until
the Report Card is reset or until the
maximum count is exceeded. If the
maximum count is exceeded for a Report
Card line item, that item will no longer be
updated in the Report Card until it is reset.
Each item will report a maximum of
1,000 counts. The distance driven will report
a maximum of 64,374 km (40,000 mi).
To delete Report Card data, do one of the
following:
.From the Report Card display, touch
Reset.
.Touch Clear All Teen Keys and PIN from
the Teen Driver menu. This will also
unregister any Teen Driver keys and
delete the PIN.
Forgotten PIN
See your dealer to reset the PIN.
Trademarks and License
Agreements
FCC Information
See Radio Frequency Statement 0340.
"Made for iPod," and "Made for iPhone,"
mean that an electronic accessory has been
designed to connect specifically to iPod or
iPhone, respectively, and has been certified
by the developer to meet Apple
performance standards. Apple is not
responsible for the operation of this device