Chevrolet 2008 Avalanche Owner's Manual page 142

Driver Information Center (DIC) to indicate that URPA is
off, see DIC Warnings and Messages on page 3-59
for information about clearing the message.
Notice: If you use URPA while the tailgate is
lowered, it may not detect an object behind your
vehicle, and you might back into the object and
damage your vehicle. Always verify the tailgate is
closed when using URPA or turn off URPA when
driving with the tailgate lowered.
2-60
The system can be
disabled by pressing the
rear park aid disable button
located next to the radio.
The indicator light will
come on and PARKING
ASSIST OFF displays
on the
When the System Does Not Seem to
Work Properly
If the URPA system will not activate due to a temporary
condition, the message PARKING ASSIST OFF will be
displayed on the DIC and a red light will be shown on
the rear URPA display when the shift lever is moved into
R (Reverse). This occurs under the following conditions:
•
The driver disables the system.
•
The parking brake pedal is depressed.
•
The ultrasonic sensors are not clean. Keep the
vehicle's rear bumper free of mud, dirt, snow, ice and
slush. For cleaning instructions, see Washing Your
Vehicle on page 5-102.
•
A trailer was attached to the vehicle, or a bicycle or
an object was hanging out of the tailgate during the
last drive cycle, the red light may illuminate in the
rear display. Once the attached object is removed,
URPA will return to normal operation.
•
A tow bar is attached to the vehicle.
•
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 15 mph (25 km/h), take the vehicle to your dealer/
retailer.