key battery CHEVROLET BLAZER 2021 Owner's Manual

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Keys, Doors, and Windows 7
The key that is part of the Remote Keyless
Entry (RKE) transmitter can be used for all
locks.
Remove the key by pressing the button on
the side of the RKE transmitter near the
bottom and pull the key out. Never pull the
key out without pressing the button.
If it becomes difficult to turn the key,
inspect the key blade for debris. Periodically,
clean with a brush or a pick.
See your dealer if a new transmitter is
needed.
If locked out of the vehicle, seeRoadside
Assistance Program 0352.
With an active OnStar or connected service
plan, an OnStar Advisor may remotely
unlock the vehicle. See OnStar Overview
0 360.
Remote Keyless Entry (RKE)
System
See Radio Frequency Statement 0357.
If there is a decrease in the Remote Keyless
Entry (RKE) operating range:
.Check the distance. The transmitter may
be too far from the vehicle.
.Check the location. Other vehicles or
objects may be blocking the signal.
.Check the transmitter's battery. See
“Battery Replacement” later in this
section.
.If the transmitter is still not working
correctly, see your dealer or a qualified
technician for service.
Remote Keyless Entry (RKE)
System Operation
The Keyless Access system allows for vehicle
entry when the Remote Keyless Entry (RKE)
transmitter is within 1 m (3 ft). See “Keyless
Access Operation” later in this section.
The RKE transmitter may work up to 60 m
(197 ft) away from the vehicle.
Other conditions can affect the performance
of the transmitter. See Remote Keyless Entry
(RKE) System 07.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
10 Keys, Doors, and Windows
lock with the RKE transmitter inside the
vehicle. Do not leave the RKE transmitter in
an unattended vehicle.
To customize the doors to automatically lock
when exiting the vehicle, see“Remote Lock,
Unlock, Start” underVehicle Personalization
0 113.
Temporary Disable of Passive Locking
Temporarily disable passive locking by
pressing and holding
Kon the interior door
switch with a door open for at least
four seconds, or until three chimes are
heard. Passive locking will then remain
disabled until
Qon the interior door is
pressed, or until the vehicle is turned on.
Remote Left in Vehicle Alert
When the vehicle is turned off and an RKE
transmitter is left in the vehicle, the horn
will chirp three times after all doors are
closed. To turn on or off, see Vehicle
Personalization 0113.
Remote No Longer in Vehicle Alert
If the vehicle is on with a door open, and
then all doors are closed, the vehicle will
check for RKE transmitters inside. If an RKE
transmitter is not detected, the Driver
Information Center (DIC) will display NO REMOTE DETECTED and the horn will chirp
three times. This occurs only once each time
the vehicle is driven. See
Vehicle
Personalization 0113.
Keyless Liftgate Opening
Press the touch pad in the liftgate handle to
open the liftgate if the RKE transmitter is
within 1 m (3 ft).
Key Access
To access a vehicle with a weak transmitter
battery, see Door Locks014.
Programming Transmitters to the Vehicle
Only RKE transmitters programmed to the
vehicle will work. If a transmitter is lost or
stolen, a replacement can be purchased and
programmed through your dealer. The
vehicle can be reprogrammed so that lost or
stolen transmitters no longer work. Each
vehicle can have up to eight transmitters
matched to it.
Programming with Recognized Transmitters
A new transmitter can be programmed to
the vehicle when there are two recognized
transmitters. To program, the vehicle must be off and all
of the transmitters, both currently
recognized and new, must be with you.
1. Remove the key lock cylinder cap on the driver door handle. See Door Locks014.
Place the two recognized transmitters in
the cupholder.
2. Insert the vehicle key of the transmitter into the key lock cylinder on the driver
door handle and turn the key,
counterclockwise, to the unlock position
five times within 10 seconds.
The DIC displays READY FOR REMOTE #3,
4, 5, ETC.
3. Place the new transmitter into the frontcupholder.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
12 Keys, Doors, and Windows
8. Replace the key lock cylinder cap. SeeDoor Locks 014.
Starting the Vehicle with a Low
Transmitter Battery
When the vehicle is started, if the
transmitter battery is weak, the DIC may
display NO REMOTE DETECTED or NO
REMOTE KEY WAS DETECTED PLACE KEY IN
TRANSMITTER POCKET THEN START YOUR
VEHICLE. The DIC may then display REPLACE
BATTERY IN REMOTE KEY.
To start the vehicle:
1. Place the transmitter in the front
cupholder. 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 if the DIC displays
REPLACE BATTERY IN REMOTE KEY.
The battery is not rechargeable. To replace
the battery:

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Keys, Doors, and Windows 13
1. Press the button on the side of the RKEtransmitter and pull the key out. Never
pull the key out without pressing the
button.
2. Separate the two halves of the transmitter using a flat tool inserted into
the area near the key slot.3. Remove the battery by pushing on thebattery and sliding it toward the bottom
of the transmitter. Do not use a metal
object.
4. Insert the new battery, positive side facing the back cover. Push the battery
down until it is held in place. Replace
with a CR2032 or equivalent battery.
5. Snap the battery cover back on to the transmitter.
6. Reinsert the key.
Remote Vehicle Start
If equipped, this feature allows the engine
to be started from outside of the vehicle.
/: This button will be on the RKE
transmitter if the vehicle has remote start.
The climate control system will use the
previous settings during a remote start. The
rear defog may come on during a remote
start based on cold ambient conditions. The
rear fog indicator light does not come on
during a remote start.
If the vehicle has auto heated or ventilated
seats, they may come on during a remote
start. See Heated and Ventilated Front Seats
0 40.
If equipped with a remote start heated
steering wheel, it may come on during a
remote start when it is cold outside,
if enabled. See Heated Steering Wheel 083
and
Vehicle Personalization 0113.
Laws in some local communities may restrict
the use of remote starters. For example,
some laws may require a person using
remote start to have the vehicle in view.
Check local regulations for any
requirements.
Do not use the remote start feature if the
vehicle is low on fuel. The vehicle could run
out of fuel.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Keys, Doors, and Windows 15
Warning (Continued)
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 or unlock the doors from the
outside:
.PressQorKon the Remote Keyless
Entry (RKE) transmitter. See Remote
Keyless Entry (RKE) System Operation 07.
.In the case of a dead battery, use the key
in the driver door. The key lock cylinder is
covered with a cap.
To lock or unlock the doors from the inside:
.PressQorKon the power door lock
switch.
.Push down on a door lock knob to lock
a door.
.Pull the door handle once to unlock the
door. Pull the 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
unlock. See
“Keyless Access Operation” in
Remote Keyless Entry (RKE) System
Operation 07.
Driver Door Key Lock Cylinder Access (In
Case of Dead Battery)
To access the driver door key lock cylinder:
1. Pull the door handle (1) to the open position and hold it open until cap
removal is complete.
2. Insert the key into the slot (3) on the bottom of the cap (2) and lift the key
upward.
3. Move the cap (2) rearward and remove.
4. Use the key in the cylinder.
To replace the cap: 1. Pull the door handle (1) to the open position and hold it open until cap
installation is complete.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Keys, Doors, and Windows 19
Use the pull cup to lower and close the
liftgate. Do not press the touch pad while
closing the liftgate. This will cause the
liftgate to be unlatched.
The liftgate can be opened when locked if
the RKE transmitter is within 1 m (3 ft) of
the touch pad. SeeRemote Keyless Entry
(RKE) System Operation 07.
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.
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 with a power liftgate, the 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.
To power open or close the liftgate, select
MAX or 3/4 mode.
.Pressbtwice quickly on the RKE
transmitter until the liftgate moves.
.Press8on the driver door. The driver
door must either be unlocked or locked
without the security armed.
.Press the touch pad in the liftgate handle
after unlocking all doors. The RKE
transmitter must be within 1 m (3 ft).
.Presslon the bottom of the liftgate.
Press any liftgate button or the touch pad
while the liftgate is moving to stop it.
Pressing again restarts the operation in the
reverse direction. The touch pad in the
liftgate handle cannot be used to close the
liftgate.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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22 Keys, Doors, and Windows
1. 1 m (3 ft) Hands-Free OperationDetection Zone
2. 2 m (6 ft) Projected Logo Detection Zone
The projected logo shows where the kicking
motion is to take place.
The projected logo will only be available for
this RKE transmitter after it has been out of
range for at least 20 seconds.
If an RKE transmitter is again detected
within approximately 2 m (6 ft) of the
liftgate, or another hands-free operation has
been detected, the one-minute timer will be
reset. The projected logo will not work under
these conditions:
.The vehicle battery is low.
.The transmission is not in P (Park).
.Hands Free Liftgate Control is set to Off
in vehicle personalization. See
Vehicle
Personalization 0113.
.The power liftgate is turned off.
.The vehicle remains parked for 72 hours
or more, with no RKE transmitter use or
Keyless Access operation. To re-enable,
press any button on the RKE transmitter
or open and close a vehicle door.
The projected logo will not work for a single
RKE transmitter when a transmitter:
.Has been left within approximately 2 m
(6 ft) of the liftgate for several minutes.
.Has been left inside the vehicle and all
vehicle doors are closed.
.Has approached the area outside of the
liftgate five times within 10 minutes. Lens Cleaning
If equipped, use a cotton swab to clean
the lens.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Keys, Doors, and Windows 23
Hands-Free Liftgate and Projected Logo Availability
ActionHands-Free Liftgate Projected Logo
RKE transmitter entering projected logo
detection zone Operative
On for one minute
RKE transmitter left inside projected logo
detection zone for minimum of 10 minutes Operative
Off until RKE transmitter button press or a
door is opened and closed
RKE transmitter brought in and out of
projected logo detection zone five times or
more within 10 minutes Operative
Off for one hour or until RKE transmitter
button press or a door is opened and closed
Vehicle remains parked for more than
72 hours Operative
Off until RKE transmitter button press or a
door is opened and closed
Vehicle battery is low Non-operative Off
Transmission is not in P (Park) Non-operative Off
Power liftgate is turned off Non-operative Off
Hands-free liftgate is disabled in vehicle per-
sonalization Non-operative
Off
Vehicle Security
This vehicle has theft-deterrent features;
however, they do not make the vehicle
impossible to steal.
Vehicle Alarm System
This vehicle has an anti-theft alarm system.
Arming the Alarm System
1. Close the liftgate and the hood. Turn off
the vehicle. 2. Lock the vehicle in one of three ways:
.Use the RKE transmitter.
.Use the Keyless Access system.
.With a door open, press the
inside
Q.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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30 Keys, Doors, and Windows
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.
Remote Window Operation
If equipped, this feature allows all the
windows to be opened remotely. If enabled
in vehicle personalization, press and hold
K
on the RKE transmitter. See Vehicle
Personalization 0113.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Driving and Operating 201
The Remote Keyless Entry (RKE) transmitter
must be in the vehicle for the system to
operate. If the pushbutton start is not
working, the vehicle may be near a strong
radio antenna signal causing interference to
the Keyless Access system. SeeRemote
Keyless Entry (RKE) System Operation 07.
To shift out of P (Park), the ignition must be
on or in Service Mode and the brake pedal
must be applied.
Stopping the Engine/OFF (No Indicator
Lights) : When the vehicle is stopped, press
ENGINE START/STOP once to turn the
engine off.
If the vehicle is in P (Park), the ignition will
turn off, and Retained Accessory Power
(RAP) will remain active. See Retained
Accessory Power (RAP) 0205.
If the vehicle is not in P (Park), the ignition
will return to ACC/ACCESSORY and display
the message SHIFT TO PARK in the Driver
Information Center (DIC). When the vehicle
is shifted into P (Park), the ignition will
turn off.
Do not turn the engine off when the vehicle
is moving. This will cause a loss of power
assist in the brake and steering systems and
disable the airbags. If the vehicle must be shut off in an
emergency:
1. Brake using a firm and steady pressure. Do not pump the brakes repeatedly. This
may deplete power assist, requiring
increased brake pedal force.
2. Shift the vehicle to N (Neutral). This can be done while the vehicle is moving.
After shifting to N (Neutral), firmly apply
the brakes and steer the vehicle to a
safe location.
3. Come to a complete stop, shift to P (Park), and turn the ignition off. The
shift lever must be in P (Park) to turn the
ignition off.
4. Set the parking brake. See Electric
Parking Brake 0211.
{Warning
Turning off the vehicle while moving may
cause loss of power assist in the brake
and steering systems and disable the
airbags. While driving, only shut the
vehicle off in an emergency. If the vehicle cannot be pulled over, and
must be shut off while driving, press and
hold ENGINE START/STOP for longer than
two seconds, or press twice in five seconds.
ACC/ACCESSORY (Amber Indicator Light) :
This mode allows some electrical accessories
to be used when the engine is off.
With the ignition off, pressing the button
one time without the brake pedal applied
will place the ignition system in ACC/
ACCESSORY.
The ignition will switch from ACC/
ACCESSORY to OFF after five minutes to
prevent battery rundown.
ON/RUN/START (Green Indicator Light) :
This
mode is for driving and starting. With the
ignition off, and the brake pedal applied,
pressing the button once will place the
ignition system in ON/RUN/START. Once
engine cranking begins, release the button.
Engine cranking will continue until the
engine starts. See Starting the Engine 0202.
The ignition will then remain in ON/RUN.
Service Mode
This power mode is available for service and
diagnostics, and to verify the proper
operation of the malfunction indicator lamp
as may be required for emission inspection