GMC Terrain 2010 Owner's Manual page 257

System Settings
Each time the vehicle is started
URPA defaults to the On setting.
Use the Vehicle Personalization on
page 4 36 menu to
configure URPA.
The settings are:
On: Turns URPA on
Off: Turns URPA off
Tow Bar: Use when a tow bar is
attached to the vehicle
Tow Bar
When the tow bar setting is used,
an area of 16 cm (6 in) around the
hitch is not detected by the system.
When the System Does Not
Seem to Work Properly
If the URPA system does not
activate due to a temporary
condition, the message Park Assist
Off displays on the DIC and a red
light is shown on the rear URPA
display when the shift lever is
moved into R (Reverse). This can
occur under the following
conditions:
The ultrasonic sensors are not
clean. Keep the vehicle's rear
bumper free of mud, dirt, snow,
ice and slush. For cleaning
instructions, see Exterior Care
on page 9 85.
A trailer was attached to the
vehicle, or an object was
hanging out of the liftgate during
the last drive cycle, a red light
may come on in the rear display.
Once the attached object is
removed, URPA will return to
normal operation.
Driving and Operating
A tow bar is attached to the
vehicle and the tow bar setting is
not being used, or an odd
shaped tow bar is attached to
the vehicle and the tow bar
setting is being used.
The vehicle's bumper is
damaged. Take the vehicle to
your dealer/retailer to repair the
system.
Other conditions may affect
system performance, such as
vibrations from a jackhammer or
the compression of air brakes on
a very large truck.
If the system is still disabled, after
driving forward at least 25 km/h
(15 mph), take the vehicle to your
dealer/retailer.
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