2007 Chevrolet Avalanche Owner's Manual - Page 220

Ultrasonic Rear Parking Assist (URPA) If your vehicle has the Ultrasonic Rear Parking Assist (URPA) system it is designed to help you park while in REVERSE (R). It operates only at speeds less than 5 mph (8 km/h). URPA helps make parking easier and helps you avoid colliding with objects such as parked vehicles. The URPA system detects objects that are close to the rear of the vehicle which are at least 10 inches (25.4 cm) off the ground and below hood or trunk level. The system detects objects up to 8 feet (2.5 m) behind your vehicle. The URPA sensors determine how close these objects are from your bumper within this area. {CAUTION: Even with the Ultrasonic Rear Park Assist system, the driver must check carefully before backing up. The system does not operate above speeds of 5 mph (8 km/h). The system does not detect objects more than 8 feet (2.5 meters) behind the vehicle. This detection distance limit may be reduced during warm weather or high humidity. Also, the system does not detect objects that are below your bumper, underneath your vehicle, or some objects very close to the vehicle. The system is not designed to detect children, pedestrians, bicyclists, or pets. So, unless you check carefully behind your vehicle while you are backing up, they could be injured or killed. Whether or not you are using rear park assist, always check carefully behind your vehicle before backing up and then watch closely as you do. 220