Drive Systems; Four-Wheel Drive - GMC Sierra 2023 Manual

When shifting to L (Low), the transmission
will shift to a preset lower gear range. For
this preset range, the highest gear available
will be displayed next to the L in the DIC.
See your owner s manual. All gears below
that number are available to use. For
example, when 4 (Fourth) is shown next to
the L, 1 (First) through 4 (Fourth) gears are
shifted automatically. To shift to 5 (Fifth)
gear, tap the right steering wheel control or
shift into D (Drive).
L (Low) will prevent shifting to a lower gear
range if the engine speed is too high. If the
vehicle speed is not reduced within the time
allowed, the lower gear range shift will not
be completed. Slow the vehicle, then tap the
left steering wheel control to the desired
lower gear range.
Cruise control can be used while in ERS.

Drive Systems

Four-Wheel Drive

If equipped, four-wheel drive engages the
front axle for extra traction.
Read the appropriate section for transfer
case operation before using.
Caution
Do not drive on clean, dry pavement in
4 and 4 (if equipped) for an extended
period of time. These conditions may
cause premature wear on the vehicle s
powertrain.
Driving on clean, dry pavement in 4 or 4
may:
Cause a vibration to be felt in the
steering system.
Cause tires to wear faster.
Warning
If equipped with four-wheel drive, the
vehicle will be free to roll if the transfer
case is in N (Neutral), even when the shift
lever is in P (Park). You or someone else
could be seriously injured. Be sure the
transfer case is in a drive gear
or 4 or set the parking brake before
placing the transfer case in N (Neutral).
See Shifting Into Park (Mechanical Shifter)
0 81 or Shifting Into Park (Electronic
Shifter) 0 82.
Driving and Operating
Extended high-speed operation in 4
may damage or shorten the life of the
drivetrain.
An engagement noise and bump is normal
when shifting between 4 and 4 or
N (Neutral), with the engine running.
Shifting into 4 will turn Traction Control
and StabiliTrak/Electronic Stability Control
(ESC) off. See Traction Control/Electronic
Stability Control 0 100.
2 , 4 ,
95
Caution