GMC 2018 Terrain Owner's Manual page 194

SET : Press briefly to set the
speed and activate cruise control.
If cruise control is already active,
use to decrease vehicle speed.
Setting Cruise Control
If is on when not in use, SET or
+RES could get bumped and go into
cruise when not desired. Keep
off when cruise is not being used.
To set a speed:
1. Press to turn the cruise
system on.
2. Get up to the desired speed.
3. Press and release SET. The
desired set speed briefly
appears in the instrument
cluster.
4. Remove your foot from the
accelerator pedal.
The cruise control indicator on the
instrument cluster turns green after
cruise control has been set to the
desired speed. See Instrument
Cluster 0 112.
Resuming a Set Speed
If the cruise control is set at a
desired speed and then the brakes
are applied or is pressed, the
cruise control is disengaged without
erasing the set speed from memory.
Once the vehicle speed reaches
about 40 km/h (25 mph) or more,
briefly press +RES. The vehicle
returns to the previous set speed.
Increasing Speed While Using
Cruise Control
If the cruise control system is
already activated:
Press and hold +RES on the
steering wheel until the vehicle
accelerates to the desired
speed, then release it.
To increase the speed in small
increments, briefly press +RES.
For each press, the vehicle goes
about 1 km/h (1 mph) faster.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster 0 112.
The increment value used depends
on the units displayed.
Driving and Operating
Reducing Speed While Using
Cruise Control
If the cruise control system is
already activated:
Press and hold SET until the
desired lower speed is reached,
then release it.
To slow down in small
increments, briefly press SET.
For each press, the vehicle goes
about 1 km/h (1 mph) slower.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster 0 112.
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 control, briefly
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