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

Forward Center of Interior Compartment


Object Number: 374791  Size: LF
(1)Inside Rearview Mirror (Lighted) Connector
(2)Inside Rearview Mirror (Lighted)
Figure 2:

Right Side Rear Window


Object Number: 374779  Size: LF
(1)Radio Noise Suppressor Ground
(2)Rear Window Defogger Connector
Figure 3:

Left Rear Window


Object Number: 374777  Size: LF
(1)Rear Window Defogger Grid Connector