GMC Cadillac XT4 2019 Owner's Manual page 204

Once the vehicle speed reaches about
40 km/h (25 mph) or more, move the
thumbwheel up toward RES+ briefly.
The vehicle returns to the previous set
speed.
Increasing Speed While Using
Cruise Control
If the cruise control system is already
activated:
Move the thumbwheel up toward
RES+ until the desired speed is
reached, then release it.
To increase vehicle speed in small
increments, move the thumbwheel
up toward RES+ briefly. For each
press, the vehicle goes about
1 km/h (1 mph) faster.
To increase vehicle speed in larger
increments, move the thumbwheel
up toward RES+ to the second
detent. For each press, the vehicle
speed increases to the next 5 km/h
(5 mph) mark on the speedometer.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster 0 124.
The increment value used depends on
the units displayed.
Reducing Speed While Using Cruise
Control
If the cruise control system is already
activated:
Move the thumbwheel down
toward SET until the desired
lower speed is reached, then
release it.
To decrease the vehicle speed in
small increments, move the
thumbwheel down toward SET
briefly. For each press, the vehicle
goes about 1 km/h (1 mph) slower.
To decrease the vehicle speed in
larger increments, move the
thumbwheel down toward SET to
the second detent. For each press,
the vehicle speed decreases to the
next 5 km/h (5 mph) mark on the
speedometer.
DRIVING AND OPERATING
The cruise control system may
automatically brake to slow the
vehicle down.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster 0 124.
The increment value used depends on
the units displayed.
Passing Another Vehicle While
Using Cruise Control
Use the accelerator pedal to increase
the vehicle speed. When you take your
foot off the pedal, the vehicle will slow
down to the previous set cruise speed.
While pressing the accelerator pedal
or shortly following the release to
override cruise, briefly moving the
thumbwheel down toward SET will
result in cruise set to the current
vehicle speed.
Using Cruise Control on Hills
How well the cruise control will work
on hills depends upon the vehicle
speed, load, and the steepness of the
hills. When going up steep hills, you
might have to step on the accelerator
pedal to maintain your speed. When
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