GMC 2012 Terrain Owner's Manual page 268

9-58 Driving and Operating
The vehicle can tow in D (Drive).
Use a lower gear if the
transmission shifts too often.
Do not use the Fuel Saver Mode
when towing.
Obey speed limit restrictions. Do
not drive faster than the
maximum posted speed for
trailers, or no more than 90 km/h
(55 mph), to reduce wear on the
vehicle.
For vehicles with the Ultra Rear
Parking Assist (URPA) system,
turn the system off when towing
a trailer. If the tow bar is
installed while not towing a
trailer, change the URPA system
to the Tow Bar setting. See
Ultrasonic Parking Assist on
page 9 43 for more information.
Driving with a Trailer
Towing a trailer requires experience.
Get familiar with handling and
braking with the added trailer
weight. The vehicle is now longer
and not as responsive as the
vehicle is by itself.
Check all trailer hitch parts and
attachments, safety chains,
electrical connectors, lamps, tires
and mirror adjustments. If the trailer
has electric brakes, start the vehicle
and trailer moving and then apply
the trailer brake controller by hand
to be sure the brakes are working.
During the trip, check regularly to be
sure that the load is secure, and the
lamps and trailer brakes are working
properly.
I n f o r ma t i o n P r o v i d e d b y :
Towing with a Stability Control
System
When towing, the sound of the
stability control system might be
heard. The system is reacting to the
vehicle movement caused by the
trailer, which mainly occurs during
cornering. This is normal when
towing heavier trailers.
Following Distance
Stay at least twice as far behind the
vehicle ahead as you would when
driving the vehicle without a trailer.
This can help to avoid situations
that require heavy braking and
sudden turns.
Passing
More passing distance is needed
when towing a trailer. Because the
rig is longer, it is necessary to go
farther beyond the passed vehicle
before returning to the lane.