GMC Sierra Denali 1500 2023 Owner's Manual page 228

Warning (Continued)
transfer case is in a drive gear
or 4 or set the parking brake before
placing the transfer case in N (Neutral).
See Four-Wheel Drive 0 233.
This vehicle is equipped with an
electronically controlled transmission. The
shift lock release button is designed to
prevent inadvertent shifting out of P (Park)
unless the ignition is on, the brake pedal is
applied, and the shift lock release button is
pressed.
When the vehicle is stopped, press ENGINE
START/STOP to turn off the vehicle. The
transmission will shift to P (Park)
2 , 4 ,
automatically unless the vehicle is in
N (Neutral), See Car Wash Mode later in
this section.
The vehicle will not shift into P (Park) if it is
moving too fast. Stop the vehicle and shift
into P (Park).
To shift in and out of P (Park), see Shifting
Into Park (Mechanical Shifter) 0 219 or
Shifting Into Park (Electronic Shifter) 0 220
and Shifting out of Park (Mechanical Shifter)
0 221 or Shifting out of Park (Electronic
Shifter) 0 221.
Service Shift Lever Message
If the message SERVICE SHIFTER SEE
OWNER S MANUAL appears in the Driver
Information Center (DIC), the shift lever
needs service. Have the vehicle serviced as
soon as possible. If the vehicle is
automatically shifting into P (Park), check to
see if the P (Park) button on top of the shift
lever is stuck. To operate the vehicle, hold
the shift lever in the desired gear,
R (Reverse) or D (Drive), until vehicle speed
exceeds 15 km/h (10 mph), then release the
shift lever.
Driving and Operating
R : Use this gear to back up.
If the vehicle is shifted from either
R (Reverse) to D (Drive) or L (Low), or L (Low)
or D (Drive) to R (Reverse) while the speed is
too high, the vehicle may shift to
N (Neutral). Reduce the vehicle speed and
try the shift again.
To shift into R (Reverse):
1. Bring the vehicle to a complete stop.
2. Press and hold the shift lock release
button on the side of the shift lever.
3. From the center position, move the shift
lever forward to R (Reverse). R will be
illuminated in red.
4. After releasing the shift lever, it will
return to the center position.
To shift out of R (Reverse):
1. Bring the vehicle to a complete stop.
2. Shift to the desired gear.
3. After releasing the shift lever, it will
return to the center position.
At low vehicle speeds, R (Reverse) can be
used to rock the vehicle back and forth to
get out of snow, ice, or sand without
damaging the transmission. See If the
Vehicle Is Stuck 0 206.
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