How the System Works
URPA comes on automatically when the shift lever is moved into R (Reverse). The rear display briefly illuminates to indicate the system is working.
URPA operates only at speeds less than 8 km/h (5 mph). If the vehicle is above this speed, the red light on the rear display will flash.
To be detected, objects must be at least 25 cm (10 in) off the ground and below trunk level. Objects must also be within 2.5 m (8 ft) from the rear bumper. This distance may be less during warmer or humid weather.
A single beep will sound the first time an object is detected between 1 m (40 in) and 2.5 m (8 ft) away.
Beeping will occur continuously when the vehicle is at 0.6 m (23 in) or closer to an object.
The following describes what will occur with the URPA display as the vehicle gets closer to a detected object:

The system can be disabled through the Driver Information Center (DIC). See “Park Assist” under DIC Operation and Displays for more information.
See also:
How OnStar Service Works
Automatic Crash Response,
Emergency Services, Crisis Assist,
Stolen Vehicle Assistance, Vehicle
Diagnostics, Remote Door Unlock,
Roadside Assistance, Turn-by-Turn
Navigation, and Hands-Free ...
Ignition Positions (Keyless Access)
Ignition Positions (Keyless Access)
The vehicle has an electronic
keyless ignition with pushbutton
start.
Pressing the button cycles it through
three modes, ACC/ACCESSORY,
ON/RUN/START, an ...
Additional Required Services
At Each Fuel Stop
• Engine oil level check. See Engine Oil.
• Engine coolant level check. See Engine Coolant
(4.6L Engine) or Engine Coolant
(3.9L Engine).
• Windshield washer fluid level check. See Windshi ...
