GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Rear Object Sensing


Object Number: 1916784  Size: FS
Master Electrical Component List
Object Detection Description and Operation
Control Module References
Rear Object Sensors
Figure 2:

Rear Object Sensors


Object Number: 1916787  Size: FS
Master Electrical Component List
Object Detection Description and Operation
Control Module References
Rear Object Sensing