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

Global Positioning System (GPS) Antenna


Object Number: 1499752  Size: MF
(1)Global Positioning System (GPS) Antenna
Figure 2:

Radio


Object Number: 749971  Size: MF
(1)Instrument Panel
(2)Radio Antenna
(3)Radio
(4)Instrument Panel Harness