GM Service Manual Online
For 1990-2009 cars only

If your vehicle has the Ultrasonic Front and Rear Parking Assist (UFRPA) system, it helps you park easier and helps you avoid colliding with objects such as parked vehicles. It operates at speeds less than 5 mph (8 km/h). It can determine how close objects are to the front bumper, up to 4 feet (1.2 m) in front of your vehicle and the rear bumper, up to 8 feet (2.5 m) behind your vehicle. The distance sensors are located on the front and rear bumper.

Caution: The Ultrasonic Front and Rear Park Assist (UFRPA) system does not replace driver vision. It cannot detect:

   • objects that are below the bumper, underneath the vehicle, or if they are too close or far from the vehicle
   • children, pedestrians, bicyclists, or pets.
If you do not use proper care before moving forward and while backing; vehicle damage, injury, or death could occur. Even with UFRPA, always check in front of the vehicle before moving forward and behind the vehicle before backing up. While moving forward and backing, be sure to look for objects and check the vehicle's mirrors.

Front Parking Assist Display


Object Number: 1645012  Size: A3

Rear Parking Assist Display


Object Number: 805622  Size: A2

The front display is located on top of the instrument panel to the right of the driver. The front display will have either three or six lights to provide distance and system information. With Adaptive Cruise control (ACC), it will have three lights along with the ACC lights. Without ACC, it will have six lights. High-toned beeps from the front speakers are for objects detected near the front bumper.

The rear display is located near the rear window and can be seen by looking over your right shoulder. The rear display uses three color-coded lights to provide distance and system information. Low-toned beeps from the rear speakers are for the rear bumper.

How the System Works

UFRPA comes on automatically when the shift lever is moved out of PARK (P). The system does not work at a forward or reverse speed greater than 5 mph (8 km/h).

To be detected, objects must be at least 10 inches (25.4 cm) off the ground and below hood or trunk level. Objects must also be within 4 feet (1.2 m) in front of your vehicle and 8 feet (2.5 m) from your rear bumper. This distance may be less during warmer or humid weather.

When backing, if objects are detected at the same time near both the front and rear bumpers, both color-coded light displays will notify you of objects close to each bumper. If there are objects detected near both bumpers, the beeps will only be sounded to notify that objects are close to the rear bumper. However, if while you are backing and an object comes within 1 ft (0.3 m) of the front bumper, and at the same time there is another object further than 1 ft (0.3 m) from the rear bumper, then the beeps will only be sounded to notify you of the closer object that is near the front bumper.

The system can be disabled using the Driver Information Center (DIC). See "Parking Assist" under DIC Operation and Displays for more information.

Moving Forward

When the vehicle is started, the front display will briefly illuminate to let you know the system is working.

The following describes what will occur with the front display as you get closer to a object detected in the front of your vehicle:

Description

English

Metric

amber/amber lights

ACC -- one amber light

4 ft

1.2 m

four amber lights

ACC -- two amber lights

40 in

1.0 m

four amber/ two red lights

ACC -- two amber lights/one red light

23 in

0.6 m

four amber/ two red lights and beep for three seconds

ACC -- two amber lights/one red light and beep for three seconds

1 ft

0.3 m

Backing

URPA comes on automatically when the shift lever is moved into REVERSE (R). The rear display will then briefly illuminate to let you know the system is working.

The following describes what will occur with the rear display as you get closer to an object detected in the rear of your vehicle:

Description

English

Metric

amber light

8 ft

2.5 m

amber/amber lights

40 in

1.0 m

amber/amber/red lights

23 in

0.6 m

amber/amber/red lights flashing and beep for three seconds

1 ft

0.3 m

The system can be disabled through the Driver Information Center (DIC). See "Parking Assist" under DIC Operation and Displays for more information.

When the System Does Not Seem to Work Properly

    • The driver disables the system.
    • The parking brake pedal is depressed.
    • The ultrasonic sensors are not kept clean. So be sure to keep your vehicle's front and rear bumpers free of mud, dirt, snow, ice and slush. For cleaning instructions, see Washing Your Vehicle .
    • A trailer was attached to your vehicle, or a bicycle or an object was hanging out of your trunk during your last drive cycle, the red light may illuminate in the rear display. Once the attached object is removed, UFRPA will return to normal operation.
    • A tow bar is attached to your 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 your vehicle to your dealer/retailer.