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

I/P Components


Object Number: 1456637  Size: LF
(1)Multifunction Alarm Module
(2)Ignition Key Alarm Switch
(3)Defogger Switch
(4)Clock/Tele Tail
(5)Cluster
(6)Radio
(7)Tweeter Right/Left Similar
(8)Cigar Lighter
(9)Wiper Switch
(10)Blower Switch
(11)Horn Switch
(12)Headlamp Switch
Figure 2:

Horn Relay


Object Number: 1495993  Size: LF
(1)Horn Relay
Figure 3:

Horns


Object Number: 1467221  Size: MF
(1)Horn