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

Module Power, Ground, Serial Data, and MIL


Object Number: 785926  Size: FS
Master Electrical Component List
Powertrain Control Module Description
5 Volt and Low Reference
OBD II Symbol Description Notice
Battery Voltage Supply to Underhood Fuse Blocks
Left Underhood Fuse Block- ABS, PCM, HZDT/SG, F/PMP and LP PK Fuses
Battery Voltage Supply to Underhood Fuse Blocks
Rear Fuse Block- CRK, PCM/CRU and SBM Fuses
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Rear Fuse Block- CRK, PCM/CRU and SBM Fuses
Indicators
Class 2 Serial Data Line
G100, G101, G102 and G103
Figure 2:

Engine Data Sensors- 5 Volt and Low Reference


Object Number: 785928  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors
Module Power, Ground, Serial Data, and MIL
OBD II Symbol Description Notice
Figure 3:

Engine Data Sensors


Object Number: 785930  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Fuel Controls- EVAP Controls
5 Volt and Low Reference
OBD II Symbol Description Notice
Battery Voltage Supply to Underhood Fuse Blocks
Left Underhood Fuse Block- ABS, PCM, HZDT/SG, F/PMP and LP PK Fuses
Fuel Controls- EVAP Controls
Device Controls
Driver Information Center
VSS and Transmission Internal Mode Switch
Gages
G100, G101, G102 and G103
G202 (1 of 4)
Figure 4:

Engine Data Sensors- Heated Oxygen Sensors


Object Number: 659447  Size: FS
Master Electrical Component List
Fuel System Description
Ignition Controls- Ignition System
Engine Data Sensors
OBD II Symbol Description Notice
Battery Voltage Supply to Underhood Fuse Blocks
G100, G101, G102 and G103
Figure 5:

Ignition Controls- Ignition System


Object Number: 785931  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Ignition Controls- Sensors
Fuel Controls- EVAP Controls
OBD II Symbol Description Notice
Battery Voltage Supply to Underhood Fuse Blocks
Figure 6:

Ignition Controls- Sensors


Object Number: 785932  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Engine Data Sensors- Heated Oxygen Sensors
Ignition Controls- Ignition System
OBD II Symbol Description Notice
Figure 7:

Fuel Controls- Fuel Pump Controls


Object Number: 659434  Size: FS
Master Electrical Component List
Fuel System Description
Ignition Controls- Ignition System
Ignition Controls- Sensors
Left Underhood Fuse Block- T/SIG, A/C CLU Fuses and A/C CLU Relay
Left Underhood Fuse Block- ABS, PCM, HZDT/SG, F/PMP and LP PK Fuses
G100, G101, G102 and G103
G400 (1 of 2)
Figure 8:

Fuel Controls- Fuel Injectors


Object Number: 659435  Size: FS
Master Electrical Component List
Fuel System Description
Fuel Controls- EVAP Controls
Engine Data Sensors- Heated Oxygen Sensors
OBD II Symbol Description Notice
Battery Voltage Supply to Underhood Fuse Blocks
Figure 9:

Fuel Controls- EVAP Controls


Object Number: 785933  Size: FS
Master Electrical Component List
Evaporative Emission Control System Description
Device Controls
Ignition Controls- Ignition System
OBD II Symbol Description Notice
Battery Voltage Supply to Underhood Fuse Blocks
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Engine Data Sensors
5 Volt and Low Reference
Figure 10:

Device Controls


Object Number: 875650  Size: FS
Master Electrical Component List
Boost Control System Description
Controlled/Monitored Subsystem References
Fuel Controls- EVAP Controls
OBD II Symbol Description Notice
Engine Data Sensors
Figure 11:

Controlled/Monitored Subsystem References


Object Number: 785935  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Transmission Controls
Device Controls
OBD II Symbol Description Notice
Compressor Control
Driver Information Center
Traction Control (w/NW9)
Starter Motor Controls
Engine Cooling Schematics
Brake Pedal Switches and Indicator
Figure 12:

Transmission Controls


Object Number: 902501  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Controlled/Monitored Subsystem References
OBD II Symbol Description Notice
VSS and Transmission Internal Mode Switch
Sensors
Solenoids and Stop Lamp Switch