GMC HUMMER EV 2023 Owner's Manual page 198

Four-wheel steering is not operational when
Super Cruise is active. See Super Cruise
0 213.
Maximum vehicle speed may be limited if
the four-wheel steering system becomes
inoperable.
When towing a trailer the four-wheel
steering provides enhanced stability allowing
the trailer to follow the path of the tow
vehicle more closely, especially during lane
changes. See General Towing Information
0 262 for more information on towing a
trailer.
Driver Notification
The four-wheel steering button is on the
Driver Mode Control rotary switch on the
center console behind the shift lever.
If CrabWalk Mode or Off Mode is activated,
an icon on the Driver Information Center
(DIC) will turn on and stay on. If the
Automatic Mode is activated, no icon will
display.
The following icons will display depending
on the mode activated:
CrabWalk Mode Off Mode
The following three second pop-up messages
will display on the DIC when the four-wheel
steering mode changes:
Rear Wheel Steering AUTO
Rear Wheel Steering CRABWALK
Rear Wheel Steering OFF
How to Enter Automatic Mode
Automatic Mode is the default four-wheel
steering mode at vehicle key-up.
Driving and Operating
Tap the four-wheel steering button while
in Off Mode or CrabWalk Mode to return
to the Automatic Mode.
Steering Behavior in Automatic Mode
Four-wheel steering is based on front
steering angle.
At lower vehicle speeds less than
40 km/h (25 mph) the rear wheels steer
opposite of the front wheels to
improve turning radius.
At higher vehicle speed more than
40 km/h (25 mph) the rear wheels steer
in same direction as the front wheels
to improve handling stability.
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