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

IGN I/II


Object Number: 1892802  Size: FS
Master Electrical Component List
Power Mode Description and Operation
Control Module References
IGN II/III
Figure 2:

IGN II/III


Object Number: 1892804  Size: FS
Master Electrical Component List
Power Mode Description and Operation
Control Module References
IGN I/II