GMC HUMMER EV 2023 Owner's Manual page 208

Press and hold SET until the desired
lower speed is reached, then release it.
To decrease the vehicle speed in smaller
increments, press SET down briefly. For
each press, the vehicle goes about 1 km/h
or (1 mph) slower.
To decrease the vehicle speed in larger
increments, hold SET . While holding SET
, the vehicle speed decreases to the next
5 km/h (5 mph) step, then continues to
decrease by 5 km/h (5 mph) at a time.
The set speed can also be decreased while
the vehicle is stopped.
If stopped with the brake applied, press
or hold SET until the desired set speed is
displayed.
Selecting the Follow Distance Gap
When a slower moving vehicle is detected
ahead within the selected following gap,
ACC will adjust the vehicle's speed and
attempt to maintain the follow distance gap
selected.
Press on the steering wheel to adjust
the following gap. Each press cycles the gap
button through three settings: Far, Medium,
or Near.
When pressed, the current gap setting
displays briefly on the instrument cluster.
The gap setting will be maintained until it is
changed.
Far Gap Setting
Medium Gap Setting
Driving and Operating
Near Gap Setting
If equipped, and a trailer is electrically
connected, the gap setting display will be as
follows:
Far Gap Setting with Trailer
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