2024 GMC SIERRA DENALI Rear Window

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
14 Keys, Doors, and Windows
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Remote Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Remote Key Operation . . . . . . . . . . . . . . . . . . 15
Remote Vehicle Start . . . . . . . . . . . . . . . . . . . 21
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . 23
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 23
Automatic Door Locks . . . . . . . . . . . . . . . . . . 23
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . 23
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Doors
Tailgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Transporting Items That CanCatch Fire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Power Assist Steps . . . . . . . . . . . . . . . . . . . . . . 31
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 32
Vehicle Alarm System . . . . . . . . . . . . . . . . . . 32
Steering Column Lock . . . . . . . . . . . . . . . . . . . 33
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Immobilizer Operation . . . . . . . . . . . . . . . . . . 33
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 34
Manual Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 34
Trailer-Tow Mirrors . . . . . . . . . . . . . . . . . . . . . 35
Power Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 36
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 37
Automatic Dimming Mirror . . . . . . . . . . . . . 37
Blind Spot Mirrors . . . . . . . . . . . . . . . . . . . . . . 37
Reverse Tilt Mirrors . . . . . . . . . . . . . . . . . . . . . 38
Interior Mirrors
Interior Rearview Mirrors . . . . . . . . . . . . . . . 38
Manual Rearview Mirror . . . . . . . . . . . . . . . . 38
Automatic Dimming Rearview Mirror . . . 38
Rear Camera Mirror . . . . . . . . . . . . . . . . . . . . 38
Truck Bed Camera Rearview Mirror . . . . . 41
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Power Windows . . . . . . . . . . . . . . . . . . . . . . . . 42
Rear Windows . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with a
remote key is dangerous and children or
others could be seriously injured or killed.
They could operate the power windows
or other controls or make the vehicle
move. The windows will function with
the remote key in the vehicle, and
children or others could be caught in the
path of a closing window. Do not leave
children in a vehicle with a remote key.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Keys, Doors, and Windows 21
3. Remove the battery cover.
4. Pull the seal by pulling on the tab toaccess the battery.
5. Remove the old battery. Do not use a metal object.
6. Insert the new battery, positive side facing up. Replace with a CR2450 or
equivalent battery.
7. Place the seal back into the groove around the battery compartment.
8. Replace the battery cover by snapping it back into the remote key.
9. Reinsert the mechanical key.
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 Seats 054. To
view available settings from the
infotainment screen, touch Settings >
Vehicle > Comfort and Convenience.
If equipped, the automatic heated steering
wheel may also come on. See Heated
Steering Wheel 0105.
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 remote key 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.
.The 30 minutes of engine run time 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 remote key range may be reduced
while the vehicle is running.
Other conditions can affect the performance
of the remote key. See Remote Key015.
Starting the Engine Using Remote Start
Press
Stwice on the remote key. The turn
signal lamps will flash. The lamps flash to
confirm the request to remote start the
vehicle has been received. During the
remote start the parking lamps will remain
on as long as the engine is running.
The engine will shut off after 15 minutes or
after the remainder of the 30 minute total
running time is used, unless you stop the
remote start before engine running has
completed or the vehicle is turned on.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
24 Keys, Doors, and Windows
Safety Locks
The rear door safety locks prevent
passengers from opening the rear doors
from inside the vehicle.
The safety lock is on the inside edge of the
rear doors. To use the safety lock:1. Move the lever down 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
unlock switch, or by using the
remote key.
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 up to unlock. Do the same for the other door.
Doors
Tailgate
Manual Tailgate
{Warning
It is extremely dangerous to ride on the
tailgate, even when the vehicle is
operated at low speeds. People riding on
the tailgate can easily lose their balance
and fall in response to vehicle maneuvers.
Falling from a moving vehicle may result
in serious injuries or death. Do not allow
people to ride on the tailgate. Be sure
everyone in your vehicle is in a seat and
using a seat belt properly.
Use the key to unlock the tailgate.
Open the tailgate by lifting up on its handle
while pulling the tailgate down.
To shut the tailgate, firmly push it upward
until it latches.
After closing the tailgate, pull it back to be
sure it is latched securely.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Keys, Doors, and Windows 29
Caution
Do not open the inner tailgate with the
primary tailgate open if there is a hitch
ball or trailer attached. This may damage
the tailgate.
To close the inner tailgate with the primary
tailgate closed, firmly push or pull it upward
until it latches. Pull it back to be sure it is
latched securely.
To close the inner tailgate with the primary
tailgate open:
.Hold the primary tailgate and firmly close
the inner tailgate.
.Raise the inner tailgate so it meets the
primary tailgate and close together at the
same time.
When using the tailgate step as a load stop,
the load must be secured as the load could
shift. See Cargo Tie-Downs 0102.
MultiPro Inner Tailgate Enable/Disable
The MultiPro inner tailgate may be equipped
with an enable/disable feature to prevent
the inner tailgate from being opened when
a hitch or other equipment is installed that
could damage the inner tailgate.
To disable the inner tailgate from opening:
ensure that the remote key is within
1 meter (3 ft) of the rear bumper and then
hold the upper touchpad on the tailgate
handle for up to seven seconds. The tail
lamps will flash to alert you that the inner
gate has been disabled. The inner and outer
tailgate can still be operated like a
traditional tailgate, but the inner gate will
not be able to be opened alone. To enable the inner tailgate function, hold
the upper touchpad on the handle for up to
seven seconds until the tail lamps flash. The
inner tailgate can now be opened separately
from the outer tailgate.
Tailgate Step (Step Mode)
{Warning
To avoid personal injury, keep hands
away from the hinges when operating
the tailgate step.
With the primary and inner tailgates open,
the tailgate step can be lowered to access
the pickup bed.
Using the Step
Caution
When using the tailgate as a step, the
load rating is 170 kg (375 lb), which
includes a person and cargo. Overloading
the tailgate step can cause damage to
the tailgate system.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Keys, Doors, and Windows 35
Trailer-Tow Mirrors
Extending Mirrors
Trailer tow mirrors can extend out for better
visibility when towing a trailer.
If equipped, grasp the mirror housing firmly
and pull back in one motion, arching slightly
toward the rear of the vehicle.
To return the mirror to its original position,
reverse the motion.
Auxiliary Cargo Mirror Lamps
If equipped, cargo mirror lamps face
rearward to provide more light on the sides
of the vehicle, if needed. SeeExterior Cargo
Lamps 0149.
Advanced Trailering Vision System Side
Cameras
If equipped, the Advanced Trailering Vision
System side cameras are on the bottom of
the outside mirrors. See Surround Vision
System 0254.
Power Mirrors

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Keys, Doors, and Windows 37
Fold and unfold the mirrors one time using
the mirror controls to reset them to their
normal position. A noise may be heard
during the resetting of the power folding
mirrors. This sound is normal after a manual
folding operation.
Remote Mirror Folding
If equipped, double press and holdQon the
remote key for approximately one second to
remotely fold the exterior mirrors. Double
press and hold
Kon the remote key for
approximately one second to unfold. See
Remote Key Operation 015.
This feature can be turned on or off. To
view available settings from the
infotainment screen, touch Settings >
Vehicle > Comfort and Convenience.
Heated Mirrors
If equipped with heated mirrors:
1REAR : Press to heat the outside
mirrors.
See “Rear Window Defogger” underDual
Automatic Climate Control System 0193.
Automatic Dimming Mirror
If equipped, the driver and passenger
outside mirrors automatically adjust for the
glare of headlamps from behind. This
feature comes on when the vehicle is
started.
Blind Spot Mirrors
If equipped, there is a small convex mirror
built into the upper and outer corner of the
driver outside mirror. It can show objects
that may be in the vehicle's blind zone.
Driving with the Blind Spot Mirror
Actual Mirror View

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
38 Keys, Doors, and Windows
1. When the approaching vehicle is a longdistance away, the image in the main
mirror is small and near the inboard
edge of the mirror.
2. As the vehicle gets closer, the image in the main mirror gets larger and moves
outboard.
3. As the vehicle enters the blind zone, the image transitions from the main mirror
to the blind spot mirror.
4. When the vehicle is in the blind zone, the image only appears in the blind spot
mirror.
Using the Outside Mirror with the Blind
Spot Mirror
1. Set the main mirror so that the side ofthe vehicle can just be seen and the
blind spot mirror has an
unobstructed view.
2. When checking for traffic or before changing a lane, look at the main driver/
passenger side mirror to observe traffic
in the adjacent lane, behind your vehicle.
Check the blind spot mirror for a vehicle
in the blind zone. Then, glance over your
shoulder to double check before moving
slowly into the adjacent lane.
Reverse Tilt Mirrors
If equipped with reverse tilt mirrors and
memory seats, the passenger and/or driver
mirror tilts to a preselected position when
the vehicle is in R (Reverse). This allows the
curb to be seen when parallel parking.
The mirror(s) may move from their tilted
position when:
.The vehicle is shifted out of R (Reverse),
or remains in R (Reverse) for about
30 seconds.
.The vehicle is turned off.
.The vehicle is driven in R (Reverse) above
a set speed.
To view available settings from the
infotainment screen, touch Settings >
Vehicle > Comfort and Convenience.
Interior Mirrors
Interior Rearview Mirrors
Adjust the rearview mirror for a clear view
of the area behind your vehicle.
Do not spray glass cleaner directly on the
mirror. Use a soft towel dampened with
water.
Manual Rearview Mirror
If equipped, push the tab forward for
daytime use and pull it rearward for
nighttime use to avoid glare from the
headlamps from behind.
Automatic Dimming Rearview
Mirror
If equipped, the mirror will automatically
reduce the glare of the headlamps from
behind. The dimming feature comes on each
time the vehicle is started.
Rear Camera Mirror
If equipped, this automatic dimming mirror
provides a wide angle camera view of the
area behind the vehicle.

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
40 Keys, Doors, and Windows
.Tilt
{Warning
The Rear Camera Mirror (RCM) has a
limited view. Portions of the road,
vehicles, and other objects may not be
seen. Do not drive or park the vehicle
using only this camera. Objects may
appear closer than they are. Check the
outside mirrors or glance over your
shoulder when making lane changes or
merging. Failure to use proper care may
result in injury, death, or vehicle damage.
Troubleshooting
See your dealer for service if a blue screen
and
3are displayed in the mirror, and
the display shuts off. Also, push the tab as
indicated to return to the automatic
dimming mode.
The Rear Camera Mirror may not work
properly or display a clear image if:
.There is glare from the sun or headlamps.
This may obstruct objects from view.
If needed, push the tab to turn off the
display.
.Dirt, snow, or other debris blocks the
camera lens. Clean the lens with a soft
damp cloth.
.The camera’s mounting on the vehicle has
been damaged, and/or the position or the
mounting angle of the camera has
changed.