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

Switches, Lower Right of Instrument Panel


Object Number: 1676305  Size: MF
(1)Ultrasonic Rear Parking Assist (URPA) Switch (Z75); Roof Beacon Switch (5G4)
(2)Traction Control Switch (JL4)
Figure 2:

Under RR Seat (Short Wheelbase)


Object Number: 1522629  Size: LF
(1)LR Seat
(2)Rear Parking Assist (RPA) Diagnostic Connector
(3)Rear Object Sensor Control Module
Figure 3:

Left Side of the Luggage Compartment (Long Wheelbase, Except Avalanche and Escalade EXT)


Object Number: 1522630  Size: LF
(1)Left Rear Quarter Panel
(2)Rear Parking Assist (RPA) Diagnostic Connector
(3)Rear Object Sensor Control Module
Figure 4:

Under Left Rear Passenger Seat (Avalanche and Escalade EXT)


Object Number: 1562752  Size: LF
(1)C415 Body Extension Jumper Harness to Body Harness
(2)Rear Parking Assist (RPA) Display
(3)Left Rear Inner Door Panel
(4)Rear Object Sensor Control Module
(5)Rear Parking Assist (RPA) Diagnostic Connector
(6)Electronic Suspension Control (ESC) Module
Figure 5:

Right Rear Corner -- except Escalade EXT and Avalaanche


Object Number: 1685050  Size: MF
(1)Auxiliary Power Outlet -- Rear
(2)Speaker -- Right D-Pillar
(3)Rear Parking Assist (RPA) Display
Figure 6:

Rear Object Sensors


Object Number: 1402937  Size: MF
(1)Rear Fascia
(2)Object Sensor - RR Corner
(3)Object Sensor - RR Middle
(4)Object Sensor - LR Middle
(5)Object Sensor - LR Corner