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

Roof/Headliner


Object Number: 1206302  Size: LF
(1)Inside Rearview Mirror
Figure 2:

Above the Rear Window


Object Number: 1552092  Size: LF
(1)Digital Radio Antenna (U2K)
(2)Radio Antenna Module
(3)Roof Panel
(4)Radio Rear Window Antenna
(5)Rear Window Defogger Grid
Figure 3:

Rear of the Vehicle


Object Number: 1507909  Size: LF
(1)Rear Window Defogger Grid
(2)Center High Mounted Stop Lamp (CHMSL)
(3)Backup Lamp - Right
(4)Tail Lamp - Right Upper
(5)Tail / Stop and Turn Signal Lamp - Right
(6)Marker Lamp - Right
(7)Tail Lamp - Right Lower
(8)Object Sensor - RR Corner
(9)Object Sensor - RR Middle
(10)License Lamp - Right
(11)License Lamp - Left
(12)Object Sensor - LR Middle
(13)Object Sensor - LR Corner
(14)Tail Lamp - Left Lower
(15)Marker Lamp - Left
(16)Tail / Stop and Turn Signal Lamp - Left
(17)Backup Lamp - Left
(18)Tail Lamp - Left Upper