Safety Locks; Doors; Tailgate - GMC Sierra 2018 Owner's Manual

40 Keys, Doors, and Windows
If an RKE transmitter is detected,
and the number of RKE transmitters
has not reduced, the driver door will
unlock and the horn will chirp three
times.
This can be manually overridden by
pressing and holding on the
power door lock switch.
Unlocked Door Anti-Lockout
If Unlocked Door Anti-Lockout is
turned on and the vehicle is off, the
driver door is open, and locking is
requested, all the doors will lock and
the driver door will remain open.
Press the button again to lock the
driver door. The Unlocked Door
Anti-Lockout feature can be turned
on or off. See Vehicle
Personalization 0 161.

Safety Locks

The rear door safety locks prevent
passengers from opening the rear
doors from inside the vehicle.
Crew/Double Cab Premium Trim
Shown, Others Similar
Press to activate the safety locks
on the rear doors. The indicator light
comes on when activated. Press
again to deactivate. The vehicle
must be on, in ACC/ACCESSORY,
or in Retained Accessory Power
(RAP). See Retained Accessory
Power (RAP) 0 250.
If the indicator light flashes, the
feature may not be working properly.

Doors

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.
If equipped, to lock or unlock the
tailgate, use the RKE transmitter or
the key. See Remote Keyless Entry
(RKE) System Operation 0 35.
Open the tailgate by lifting up on its
handle while pulling the
tailgate down.