Drive Systems; Four-Wheel Drive - GMC Sierra Denali 1500 2023 Owner's Manual

For vehicles without Driver Mode Control,
press the Tow/Haul button on the center
stack.
If equipped, the Stop/Start system will
become unavailable when Tow/Haul Mode is
active.
If equipped with Active Hydraulic Assist, the
vehicle will provide a stiffer steering
response when Tow/Haul mode is engaged
to provide enhanced steering functionality.
Tow/Haul Mode Grade Braking
Tow/Haul Mode Grade Braking is only
enabled while the Tow/Haul Mode is
selected and the vehicle is not in the Range
Selection Mode. See Manual Mode
(Mechanical Shifter) 0 230 or
Manual Mode (Electronic Shifter) 0 232.
Tow/Haul Mode Grade Braking assists in
maintaining desired vehicle speeds when
driving on downhill grades by using the
engine and transmission to slow the vehicle.
See Towing Equipment 0 309.

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.
Driving and Operating
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)
0 219 or
Shifting Into Park (Electronic Shifter)
0 220.
Caution
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 0 240.
233
2 , 4 ,