GMC Sierra 2014 Owner's Manual page 315

Then slowly release the dial to
the Four-Wheel Drive Low
position. The N (Neutral) light will
come on when the transfer case
shift to N (Neutral) is complete.
7. If the engine is running, make
sure that the transfer case is in
N (Neutral) by shifting the
transmission to R (Reverse) for
one second, then shift the
transmission to D (Drive) for
one second.
8. Turn the ignition to ACC/
ACCESSORY, which will turn the
engine off.
9. Place the transmission shift
lever in P (Park).
10. Release the parking brake prior
to moving the vehicle.
11. Turn the ignition to LOCK/OFF.
Shifting Out of N (Neutral)
To shift out of N (Neutral):
1. Set the parking brake and apply
the regular brake pedal.
2. Turn the ignition to ON/RUN with
the engine off, and shift the
transmission to N (Neutral).
3. Turn the transfer case dial to
Two-Wheel Drive High,
Four-Wheel Drive High,
or AUTO.
After the transfer case has
shifted out of N (Neutral), the
N (Neutral) light will go out.
4. Release the parking brake prior
to moving the vehicle.
Caution
Shifting the transmission into
gear before the requested mode
indicator light has stopped
flashing could damage the
transfer case.
Driving and Operating
Caution (Continued)
To help avoid damaging the
vehicle, always wait for the mode
indicator lights to stop flashing
before shifting the transmission
into gear.
5. Start the engine and shift the
transmission to the desired
position.
(Continued)
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