
Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
16 Keys, Doors, and Windows
To start the vehicle:
1. Place the transmitter in the transmitterpocket with the buttons facing the front
of the vehicle.
2. With the vehicle in P (Park) or N (Neutral), press the brake pedal and
ENGINE START/STOP.
Replace the transmitter battery as soon
as possible.
Battery Replacement
{Warning
Never allow children to play with the RKE
transmitter. The transmitter contains a
small battery, which can be a choking
hazard. If swallowed, internal burns can
occur, resulting in severe injury or death.
Seek medical attention immediately if a
battery is swallowed.
{Warning
To avoid personal injury, do not touch
metal surfaces on the RKE transmitter
when it has been exposed to extreme
heat. These surfaces can be hot to the
touch at temperatures above 59 °C
(138 °F).
Caution
When replacing the battery, do not touch
any of the circuitry on the transmitter.
Static from your body could damage the
transmitter.
Caution
Always replace the battery with the
correct type. Replacing the battery with
an incorrect type could potentially create
a risk of battery explosion. Dispose of
used batteries according to instructions
and local laws. Do not attempt to burn,
crush, or cut the used battery, and avoid
exposing the battery to environments
with extremely low air pressures or high
temperatures.
Replace the battery in the transmitter soon
if the DIC displays REPLACE BATTERY IN
REMOTE KEY.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
18 Keys, Doors, and Windows
Other conditions can affect the performance
of the transmitter. SeeRemote Keyless Entry
(RKE) System 09.
Starting the Engine Using Remote Start
To start the vehicle:
1. Press and release
Qon the RKE
transmitter.
2. Immediately after completing Step 1, press and hold
/until the turn signal
lamps flash. If the vehicle's lights cannot
be seen, press and hold
/for at least
four seconds.
When the vehicle starts, the park lamps will
turn on and remain on as long as the
engine is running. The doors will be locked
and the climate control system will operate
automatically if the vehicle has the
automatic system, or at the same setting as
when the vehicle was last turned off.
With an automatic climate control system
and if equipped with heated seats, the
heated seats turn on during colder outside
temperatures and shut off when the ignition
is turned on. The rear window defogger and heated
mirrors, if equipped, turn on during colder
outside temperatures and turn off when the
ignition is turned on.
After entering the vehicle during a remote
start, press the brake and ENGINE START/
STOP with the transmitter in the vehicle to
drive the vehicle.
If the vehicle is left running, it automatically
shuts off after 15 minutes unless a time
extension has been done.Extending Engine Run Time
To extend the engine run time by
15 minutes, repeat Steps 1 and 2 while the
engine is still running. An extension can be
requested 30 seconds after starting. The
engine run time can only be extended if it is
the first remote start since the vehicle has
been driven. Remote start can be extended
one time.
If the remote start procedure is used again
while the engine is still running, 15 minutes
will be added on for a total of 30 minutes.
For example, if
Qand then/are pressed
again while the engine is still running,
15 minutes will be added on for a total of
30 minutes. A maximum of two remote starts or remote
start with an extension are allowed between
ignition cycles.
After the vehicle's engine has been started
two times using the remote start button or
a start with an extension, the ignition must
be turned on and then back off before the
remote start procedure can be used again.
Canceling a Remote Start
To manually shut off a remote start:
.Press and hold/until the lamps
turn off.
.Turn on the hazard warning flashers.
.Turn the ignition switch on and then off.
Conditions in Which the Remote Start
Will Not Work
The vehicle cannot be started using the
remote start feature if the key is in the
ignition, the hood is open, the vehicle is on,
the hazard warning flashers are on, the
vehicle is not in P (Park), 30 minutes of
engine run time have been used, or there is
an emission control system malfunction.
The engine turns off during a remote start if
the coolant temperature gets too high or if
the oil pressure gets low.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
Keys, Doors, and Windows 19
Door Locks
{Warning
Unlocked doors can be dangerous.
.Passengers, especially children, can
easily open the doors and fall out of a
moving vehicle. The doors can be
unlocked and opened while the vehicle
is moving. The chance of being thrown
out of the vehicle in a crash is
increased if the doors are not locked.
So, all passengers should wear seat
belts properly and the doors should be
locked whenever the vehicle is driven.
.Young children who get into unlocked
vehicles may be unable to get out.
A child can be overcome by extreme
heat and can suffer permanent injuries
or even death from heat stroke.
Always lock the vehicle whenever
leaving it.
.Outsiders can easily enter through an
unlocked door when you slow down
or stop the vehicle. Locking the doors
can help prevent this from happening.To lock/unlock the doors from the outside:
.PressQorKon the Remote Keyless
Entry (RKE) transmitter. See Remote
Keyless Entry (RKE) System Operation (Key
Access) 09or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 011.
.Use the key in the driver door. The key
lock cylinder is covered with a cap.
To lock/unlock the doors from the inside:
.PressQorKon the power door lock
switch.
.Push down on the door lock knob to lock
a door.
.Pull the door handle once to unlock it.
Pull the door handle again to unlatch it. Keyless Access
The RKE transmitter must be within 1 m
(3 ft) of the liftgate or door being opened.
Press the button on the door handle to
open. See
Remote Keyless Entry (RKE)
System Operation (Key Access) 09or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 011.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
22 Keys, Doors, and Windows
If equipped, the safety lock is on the inside
edge of the rear doors. To use the
safety lock:1. Move the lever up to the lock position.
2. Close the door.
3. Do the same for the other rear door.
To open a rear door when the safety lock
is on: 1. Unlock the door by activating the inside handle, by pressing the power door lock
switch, or by using the Remote Keyless
Entry (RKE) transmitter.
2. Open the door from the outside.
When the safety lock is enabled, adults and
older children will not be able to open the
rear door from the inside. Cancel the safety
locks to enable the doors to open from the
inside.
To cancel the safety lock: 1. Unlock the door and open it from the outside.
2. Move the lever down to unlock. Do the same for the other door.Doors
Liftgate
{Warning
Exhaust gases can enter the vehicle if it
is driven with the liftgate or trunk/hatch
open, or with any objects that pass
through the seal between the body and
the trunk/hatch or liftgate. Engine
exhaust contains carbon monoxide (CO)
which cannot be seen or smelled. It can
cause unconsciousness and even death.
If the vehicle must be driven with the
liftgate or trunk/hatch open:
.Close all of the windows.
.Fully open the air outlets on or under
the instrument panel.
.Adjust the climate control system to a
setting that brings in only outside air
and set the fan speed to the highest
setting. See “Climate Control Systems”
in the Index.
(Continued)
Warning (Continued)
.If the vehicle is equipped with a
power liftgate, disable the power
liftgate function.
See Engine Exhaust 0200.
Caution
To avoid damage to the liftgate or
liftgate glass, make sure the area above
and behind the liftgate is clear before
opening it.
Manual Liftgate
To unlock the liftgate, pressKon the
power door lock switch or press
Kon the
Remote Keyless Entry (RKE) transmitter
twice within five seconds. See Remote
Keyless Entry (RKE) System Operation (Key
Access) 09or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 011.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
Keys, Doors, and Windows 23
To open the liftgate, press the touch pad
under the liftgate handle and lift up.
With Keyless Access, the liftgate can be
opened when locked if the RKE transmitter
is within 1 m (3 ft) of the touch pad. See
Remote Keyless Entry (RKE) System
Operation (Key Access)09or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 011.
Use the pull cup to lower and close the
liftgate. Do not press the touch pad while
closing the liftgate. This may cause the
liftgate to be unlatched. The liftgate has an electric latch. If the
battery is disconnected or has low voltage,
the liftgate will not open. The liftgate will
resume operation when the battery is
reconnected and charged.
Always close the liftgate before driving.
Power Liftgate Operation
{Warning
You or others could be injured if caught
in the path of the power liftgate. Make
sure there is no one in the way of the
liftgate as it is opening and closing.
Caution
Driving with an open and unsecured
liftgate may result in damage to the
power liftgate components.
If equipped, the power liftgate switch is on
the driver door. The vehicle must be in
P (Park).
The modes are:
.MAX: Opens to maximum height.
.3/4: Opens to a reduced height that can
be set from 3/4 to fully open. Use to
prevent the liftgate from opening into
overhead obstructions such as a garage
door or roof-mounted cargo. The liftgate
can be manually opened all the way.
.OFF: Opens manually only.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
Keys, Doors, and Windows 31
Exterior Mirrors
Convex Mirrors
{Warning
A convex mirror can make things, like
other vehicles, look farther away than
they really are. If you cut too sharply
into the adjacent lane, you could hit a
vehicle that is driving next to you. Check
the inside mirror or glance over your
shoulder before changing lanes.
The passenger side mirror is convex shaped.
A convex mirror's surface is curved so more
can be seen from the driver seat.
Power Mirrors
To adjust a mirror: 1. Press
}or|to choose the driver or
passenger mirror.
2. Press one of the four arrows on the control pad to move the mirror in the
desired direction.
3. Adjust each outside mirror so that a little of the vehicle and the area behind it can
be seen.
4. Press
}or|again to deselect the
mirror. If you do not deselect the mirror,
the mirror adjustment will turn off after
about one minute.
Lane Change Alert (LCA)
The vehicle may have LCA. See Lane Change
Alert (LCA) 0228.
Folding Mirrors
Manual Folding Mirrors
(If equipped), the mirrors can be folded
inward by hand to prevent damage when
going through tight maneuvers such as an
automatic car wash. Afterward, fold the
mirror outward by hand to return it to the
original position.
Heated Mirrors
K:Press to heat the mirrors.
See “Rear Window Defogger” under
Automatic Climate Control System 0176.
Interior Mirrors
Interior Rearview Mirrors
Adjust the rearview mirror for a clear view
of the area behind the vehicle.
Do not spray glass cleaner directly on the
mirror. Use a soft towel dampened with
water.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
32 Keys, Doors, and Windows
Manual Rearview Mirror
If equipped, push the tab forward for
daytime use and pull it rearward for
nighttime use to avoid glare of the
headlamps from behind.
Automatic Dimming Rearview
Mirror
If equipped, automatic dimming reduces the
glare of headlamps from behind. The
dimming feature comes on when the vehicle
is started.
Windows{
Warning
Never leave a child, a helpless adult, or a
pet alone in a vehicle, especially with the
windows closed in warm or hot weather.
They can be overcome by the extreme
heat and suffer permanent injuries or
even death from heat stroke.
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.
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 in a vehicle with
children. When there are children in the
rear seat, use the window lockout switch
(Continued)
Warning (Continued)
to prevent operation of the windows.
SeeKeys (Key Access) 06or
Keys (Keyless Access) 08.
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) 0199.
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.

Chevrolet Trailblazer Owner Manual (GMNA-Localizing-U.S./Canada-
14400528) - 2021 - CRC - 11/7/19
Keys, Doors, and Windows 33
Window Lockout
This feature stops the rear passenger
window switches from working.
.Press2to engage the rear window
lockout feature. The indicator light is on
when engaged.
.Press2again to disengage.
Window Express Movement
All windows can be opened without holding
the window switch. Press the switch down
fully and quickly release to express open the
window.
If equipped, pull the window switch up fully
and quickly release to express close the
window. Briefly press or pull the window switch in
the same direction to stop that window’s
express movement.
Window Automatic Reversal System
The express-close feature will reverse
window movement if it comes in contact
with an object. Extreme cold or ice could
cause the window to auto-reverse. The
window will operate normally after the
object or condition is removed.
Automatic Reversal System Override
{Warning
If automatic reversal system override is
active, the window will not reverse
automatically. You or others could be
injured and the window could be
damaged. Before using automatic reversal
system override, make sure that all
people and obstructions are clear of the
window path.
When the engine is on, override the
automatic reversal system by pulling and
holding the window switch if conditions
prevent it from closing.
Programming the Power Windows
Programming may be necessary if the
vehicle battery has been disconnected or
discharged. If the window is unable to
express-up, program each express-close
window: 1. Close all doors.
2. Turn the ignition on or to ACC/ ACCESSORY.
3. Partially open the window to be programmed. Then close it and continue
to pull the switch briefly after the
window has fully closed.
4. Open the window and continue to press the switch briefly after the window has
fully opened.
Sun Visors