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

Left Front of Floor Console


Object Number: 1263995  Size: MF
(1)C214
(2)Cigar Lighter
(3)Traction Control Switch (NW7/NW9) or Auxiliary Power Outlet (w/o NW7/ NW9)
Figure 2:

Rear of Center Console Compartment


Object Number: 1394537  Size: SF
(1)Auxiliary Power Outlet (NW7/NW9)