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

Floor Console


Object Number: 1558672  Size: MF
(1)Ignition Switch
(2)Auxiliary Power Outlet - Front
(3)Auxiliary Power Outlet - Front
Figure 2:

Floor Console - Rear


Object Number: 1558797  Size: MF
(1)HVAC Control Module - Auxiliary
(2)Auxiliary Power Outlet - Rear