Power Door Locks; Delayed Locking; Automatic Door Locks; Lockout Protection - GMC Chevrolet Silverado 2500HD 2021 Owner's Manual

22 Keys, Doors, and Windows
fully inserted. Remove the key and insert it
again. If this does not reset the lock, turn
the key halfway around in the cylinder and
repeat the reset procedure.

Power Door Locks

If equipped with power door locks.
: Press to lock the doors.
: Press to unlock the doors.

Delayed Locking

If equipped, this feature delays the locking
of the doors until five seconds after all
doors are closed.
Delayed locking can only be turned on when
the Open Door Anti-Lockout feature has
been turned off.
When is pressed on the power door lock
switch while the door is open, a chime will
sound three times indicating delayed locking
is active.
The doors will lock automatically
five seconds after all doors are closed. If a
door is reopened before that time, the
five-second timer will reset when all doors
are closed again.
Press
on the door lock switch again or
press on the RKE transmitter to lock the
doors immediately.
This feature can be programmed. See Vehicle
Personalization 0 126.

Automatic Door Locks

If equipped, the doors will lock
automatically when all doors are closed, the
ignition is on, and the vehicle is shifted out
of P (Park).
If a vehicle door is unlocked, and then
opened and closed, the doors will lock either
when your foot is removed from the brake
or the vehicle speed becomes faster than
13 km/h (8 mph).
To unlock the doors:
Press on the power door lock switch.
Shift the transmission into P (Park).
Automatic door locking cannot be disabled.
Automatic door unlocking can be
programmed. See Vehicle Personalization
0 126.

Lockout Protection

If equipped, the ignition is on or in ACC/
ACCESSORY and the power door lock switch
is pressed with the driver door open, all the
doors will lock and only the driver door will
unlock.
If the vehicle is off and locking is requested
while a door is open, when all doors are
closed the vehicle will check to the Keyless
Access function (if equipped). If an RKE
transmitter is detected and the number of
RKE transmitters inside has not reduced, the
driver door will unlock and the horn will
chirp three times.