Cruise Control; Adaptive Cruise Control (Advanced) - GMC HUMMER EV 2023 Owner's Manual

Aerodynamic height is automatically
disabled when a trailer is connected to the
vehicle, Tow/Haul mode is active, or the
vehicle is at Increased Height.
Suspension Modes
The air suspension has two special modes,
Service Mode and Alignment Mode, located
in the infotainment screen under Settings >
Vehicle > Suspension.
Service Mode
Service Mode will disable all air suspension
operation including raising and lowering the
vehicle and operation of the air compressor.
This mode is useful when the vehicle is
being towed on a flat bed or when any
work under the vehicle is being performed.
Service Mode is recommended when the
vehicle is put on a hoist or a floor jack is
used to raise a corner. Service Mode
automatically disables when vehicle speed
exceeds 32 km/h (20 mph).
Alignment Mode
Alignment Mode will optimize the vehicle
height to provide the most accurate wheel
alignment. This mode should be enabled
once the vehicle is driven onto the
alignment station.
To enable Alignment Mode, ensure the
vehicle is at Normal Height and shift the
vehicle to N (Neutral). Alignment Mode
automatically disables when vehicle speed
exceeds 16 km/h (10 mph).
Air Suspension Operation with Door(s) or
Hood Open
The air suspension will temporarily suspend
all height changes while the hood or any
door is open.
System Over-Temperature
If the air suspension is under heavy use, the
system may temporarily suspend all height
changes to allow the compressor to cool
down. When this occurs and a height
change is requested, the message LEVELING
SYSTEM UNAVAILABLE will display in the
instrument cluster.
Air Suspension Service
If a SERVICE LEVELING SYSTEM message
displays in the instrument cluster, see your
authorized dealer immediately.
Driving and Operating

Cruise Control

Adaptive Cruise Control
(Advanced)
Adaptive Cruise Control (ACC) allows the
cruise control set speed and following gap
to be selected. Read this entire section
before using this system. The following gap
is the following time (or distance) between
your vehicle and a vehicle detected directly
ahead in your path, moving in the same
direction. If no vehicle is detected in your
path, ACC works like regular cruise control.
ACC uses a camera and radar sensor(s) to
detect other vehicles. See Radio Frequency
Statement 0 374.
If a vehicle is detected in your path, ACC can
apply acceleration or limited, moderate
braking to maintain the selected following
gap. To disengage ACC, apply the brake.
If ACC is controlling the vehicle speed when
the Traction Control System (TCS) or
StabiliTrak/Electronic Stability Control (ESC)
system activates, ACC may automatically
disengage. See Traction Control/Electronic
Stability Control 0 191. When road
conditions allow ACC to be safely used, ACC
can be turned back on.
203