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

PCM Power and Ground


Object Number: 659789  Size: FS
Master Electrical Component List
Transmission Component and System Description
Sensors
OBD II Symbol Description Notice
ABS, PCM, HZDT/SG, F/PMP, LP PK and B/U LAMP Fuses
Battery Feed to Left and Right Underhood Fuse Blocks
Battery Feed to Left and Right Underhood Fuse Blocks
CRK, PCM/CRU and SBM Fuses
G100, G101, G102, and G103
Figure 2:

Sensors


Object Number: 902498  Size: FS
Master Electrical Component List
Transmission Component and System Description
Solenoids and TCC/Cruise Release Switch
PCM Power and Ground
OBD II Symbol Description Notice
Engine Data Sensors - 5-Volt and Low Reference
Figure 3:

Solenoids and TCC/Cruise Release Switch


Object Number: 1440979  Size: FS
Master Electrical Component List
Transmission Component and System Description
VSS and IMS
Sensors
OBD II Symbol Description Notice
Battery Feed to Left and Right Underhood Fuse Blocks
Battery Feed to Left and Right Underhood Fuse Blocks
Brake Pedal Switches and Indicator
Figure 4:

VSS and IMS


Object Number: 1440991  Size: FS
Master Electrical Component List
Transmission Component and System Description
Solenoids and TCC/Cruise Release Switch
OBD II Symbol Description Notice
Class 2 Serial Data Lines
G100, G101, G102, and G103