GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Seats and Restraints 57
This feature turns on at the highest setting.
With each press of the button, the heated
seat changes to the next lower setting, and
then the off setting. Three lights indicate
the highest setting, and one light indicates
the lowest. If the heated seats are on high,
the level may automatically be lowered
after approximately 30 minutes.
Remote Start Heated Seats
If equipped, the heated seats will turn on
automatically during a remote start if it is
cold outside. The heated seat indicators may
come on during this operation. The heated
seats may cancel when the vehicle is
started. These features can be manually
selected with the heated seat buttons after
the vehicle is turned on.
The temperature performance of an
unoccupied seat may be reduced. This is
normal.
To enable or disable remote start heated
seats, select Settings > Vehicle > Remote
Lock, Unlock, and Start > Remote Start Auto
Heat Seats > ON or OFF. SeeRemote Vehicle
Start 021.Seat Belts
This section describes how to use seat belts
properly, and some things not to do.
{Warning
Do not let anyone ride where a seat belt
cannot be worn properly. In a crash,
if you or your passenger(s) are not
wearing seat belts, injuries can be much
worse than if you are wearing seat belts.
You can be seriously injured or killed by
hitting things inside the vehicle harder or
by being ejected from the vehicle. In
addition, anyone who is not buckled up
can strike other passengers in the vehicle.
It is extremely dangerous to ride in a
cargo area, inside or outside of a vehicle.
In a collision, passengers riding in these
areas are more likely to be seriously
injured or killed. Do not allow passengers
to ride in any area of the vehicle that is
not equipped with seats and seat belts.
Always wear a seat belt, and check that
all passenger(s) are restrained
properly too. This vehicle has indicators as a reminder to
buckle the seat belts. See
Seat Belt
Reminders 0120.
Why Seat Belts Work
When riding in a vehicle, you travel as fast
as the vehicle does. If the vehicle stops
suddenly, you keep going until something
stops you. It could be the windshield, the
instrument panel, or the seat belts!
When you wear a seat belt, you and the
vehicle slow down together. There is more
time to stop because you stop over a longer
distance and, when worn properly, your
strongest bones take the forces from the
seat belts. That is why wearing seat belts
makes such good sense.
GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada-16908340) - 2024 - CRC - 12/7/22
Lighting 149
Base Level
For information on roof-mounted emergency
lamp installation, see www.gmupfitter.com
or contact your dealer.
If the vehicle has this button, the vehicle
may have the snow plow prep package. See
Add-On Electrical Equipment 0306.
Exterior Cargo Lamps
Work Truck
Base Level Shown, Uplevel Similar The cargo lamps provide more light in the
cargo area or on the sides of the vehicle,
if needed. The lamps inside the pickup box,
in the tailgate handle, for the hitch, and/or
the cargo mirror lamps also turn on,
if equipped.
If the vehicle is in P (Park), R (Reverse),
or N (Neutral) the Cargo Lamp Switch causes
the lights to cycle through the following
states for each button press:
Initial Press
‐
Center High Mounted Stop Lamp
(CHMSL)/Cargo Bed Lights –On
‐ Cargo Mirror Lights –On
‐ Cargo Switch Indicator (if equipped) –On
Next Press (if within 5 seconds of the
previous button press)
‐ CHMSL/Cargo Bed Lights –On
‐ Cargo Mirror Lights –Off
‐ Cargo Switch Indicator (if equipped) –On
Next Press
‐ CHMSL/Cargo Bed Lights –Off
‐ Cargo Mirror Lights –Off
‐ Cargo Switch Indicator (if equipped) –Off
