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

Left Side of the Instrument Panel, Near the Instrument Cluster


Object Number: 524987  Size: LF
(1)Headlamp Switch
(2)LH Driver Information Center (DIC) Switch
(3)LH A/C Temperature Sensor (RH Similar)
Figure 2:

Passenger Compartment, Center of the Instrument Panel


Object Number: 524953  Size: LF
(1)Ambient Light Sensor
(2)Front IP Speaker (Midrange)
(3)Hazard Switch
(4)Instrument Panel Integration Module (IPM)
(5)Radio (w/o UY4)
(6)RH Driver Information Center (DIC) Switch