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

Power and Ground


Object Number: 657779  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
SP205
B+ Bus Bar
G203 - 3 of 4 - Base Pickup
AIR, RADIO, ECM B, FRT HVAC, and CIGAR Fuses
G103 and G105 - Gas
G203 - 3 of 4 - Base Pickup
G103 and G105 - Gas
G105 - Diesel
G103 and G105 - Gas
G203 - 1 of 4
Figure 2:

SP205


Object Number: 657780  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Power and Ground