GMC Sierra 2500 HD 2023 Owner's Manual page 30

If the tailgate encounters multiple obstacles,
the power function will deactivate. After
removing the obstructions, manually close
the tailgate to resume normal power
operation.
Manual Operation
The tailgate can be manually closed from
the full-open position when the tailgate is
lifted in a continuous motion. If the tailgate
motion is stopped between the full-open
and half-closed positions, the lift-to-close
feature can engage and power close the
tailgate. If the touch pad is pressed during
power operation, the tailgate will stop and
allow manual operation. The tailgate must
be held after stopping, or it will continue
to open.
MultiPro Tailgate
Warning
Make sure there is no one in the way of
the power tailgate as it is opening and
closing, and keep hands away from the
tailgate hinges when in use. You or
others could be injured if caught in the
path of the power tailgate or tailgate
hinges.
Caution
To avoid damage to the tailgate, make
sure the area behind the tailgate is clear
before opening it.
If equipped with this feature, the vehicle
must be in P (Park).
Switches in the inner tailgate prevent the
primary tailgate from being opened when
the inner tailgate is not fully closed.
Keys, Doors, and Windows
To open the primary tailgate:
Press twice quickly on the RKE
transmitter until the tailgate moves. See
Remote Keyless Entry (RKE) System
Operation (Key Access) 0 12 or
Remote Keyless Entry (RKE) System
Operation (Keyless Access) 0 14.
If equipped with Keyless Access, the
tailgate can be opened if the RKE
transmitter is within 1 m (3 ft).
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