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

Rear Fascia


Object Number: 2018367  Size: LF
(1)Object Sensor - Left Rear Corner (UD7)
(2)Object Sensor - Left Rear Middle (UD7)
(3)Object Sensor - Right Rear Middle (UD7)
(4)Object Sensor - Right Rear Middle (UD7)
Figure 2:

Headliner Components


Object Number: 2018370  Size: LF
(1)Front Roof Courtesy/Reading Lamp
(2)Infrared Module
(3)Keyless Entry System Antenna - Headliner
(4)Sunroof Control Module (CF5)
(5)Rear Roof Courtesy/Reading Lamp
(6)Rear Parking Assist (RPA) Display (UD7)
(7)Sunroof Assembly (CF5)
(8)Top of Headliner
(9)Noise Compensation Microphone (UY5)
(10)Sunroof Switch (CF5)
Figure 3:

Under the Rear Window Shelf


Object Number: 2018371  Size: LF
(1)Module Bracket Assembly
(2)Remote Control Door Lock Receiver (RCDLR)
(3)Rear Integration Module (RIM)
(4)Rear Object Sensor Control Module
(5)Rear Window Shelf