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

Module Power, Ground, Serial Data and MIL


Object Number: 789163  Size: FS
Master Electrical Component List
Engine Data Sensors - Volt and Low Reference
Engine Controls Schematic Icons
Serial Data Class 2
G104 and G105
Start 1 Relay, INJR 2, PCM IGN, CR CONT, and INJR 2 Fuses (Fuse Block - Underhood)
High and Low Beam Relays, ABS, PCM BATT, High and Low Beam Relays (Fuse Block Underhood)
Ignition Switch (2 of 2)
Figure 2:

Engine Data Sensors -- Volt and Low Reference


Object Number: 789167  Size: FS
Master Electrical Component List
Engine Data Sensors - Pressure and Temperature
Module Power, Ground, Serial Data and MIL
Engine Controls Schematic Icons
Figure 3:

Engine Data Sensors -- Pressure and Temperature


Object Number: 789171  Size: FS
Master Electrical Component List
Engine Data Sensors - MAF, VSS and Extended Brake Travel Switch
Engine Data Sensors - Volt and Low Reference
Engine Controls Schematic Icons
Figure 4:

Engine Data Sensors -- MAF, VSS and Extended Brake Travel Switch


Object Number: 789175  Size: FS
Master Electrical Component List
Engine Data Sensors - (HO2S)
Engine Data Sensors - Pressure and Temperature
Engine Controls Schematic Icons
G200 (1 of 2)
Transmission Inputs L36
PCM, IPC Inputs
G104 and G105
IGN 1 Relay, Transmission, DIS, OXY SEN, and IGN 1 Fuses (Fuse Block Underhood)
IGN 1 Relay, Transmission, DIS, OXY SEN, and IGN 1 Fuses (Fuse Block Underhood)
Figure 5:

Engine Data Sensors -- (HO2S)


Object Number: 789177  Size: FS
Master Electrical Component List
Ignition Controls - Ignition System
Engine Data Sensors - MAF, VSS and Extended Brake Travel Switch
Engine Controls Schematic Icons
G100, and G102
IGN 1 Relay, Transmission, DIS, OXY SEN, and IGN 1 Fuses (Fuse Block Underhood)
Figure 6:

Ignition Controls -- Ignition System


Object Number: 789179  Size: FS
Master Electrical Component List
Ignition Controls - Sensors
Engine Data Sensors - (HO2S)
Engine Controls Schematic Icons
PCM, IPC Inputs
IGN 1 Relay, Transmission, DIS, OXY SEN, and IGN 1 Fuses (Fuse Block Underhood)
Figure 7:

Ignition Controls -- Sensors


Object Number: 789182  Size: FS
Master Electrical Component List
Fuel Controls - Fuel Pump Controls
Ignition Controls - Ignition System
Engine Controls Schematic Icons
Figure 8:

Fuel Controls -- Fuel Pump Controls


Object Number: 789185  Size: FS
Master Electrical Component List
Fuel Controls - Fuel Injectors
Ignition Controls - Sensors
Engine Controls Schematic Icons
G300 and G302
G401 (2 of 2)
Fuel Pump and Sender Assembly, Rear Compartment Lid Switch
Battery Feed to Rear Fuse Block
Figure 9:

Fuel Controls -- Fuel Injectors


Object Number: 789187  Size: FS
Master Electrical Component List
Fuel Controls - EVAP Controls
Fuel Controls - Fuel Pump Controls
Engine Controls Schematic Icons
Start 1 Relay, INJR 2, PCM IGN, CR CONT, and INJR 2 Fuses (Fuse Block - Underhood)
Figure 10:

Fuel Controls -- EVAP Controls


Object Number: 789189  Size: FS
Master Electrical Component List
Device Controls - EGR, IAC, and AIR
Fuel Controls - Fuel Injectors
Engine Controls Schematic Icons
IGN-1, VENT SOL, and SIR Fuses (Fuse Block Rear)
IGN-1, VENT SOL, and SIR Fuses (Fuse Block Rear)
Figure 11:

Device Controls -- EGR, IAC, and AIR


Object Number: 789190  Size: FS
Master Electrical Component List
Controlled/Monitored Subsystem References
Fuel Controls - EVAP Controls
Engine Controls Schematic Icons
G100, and G102
AIR Pump and ACCY Relays, AIR, C/LTR, AUX PWR, WSW, and ACCY Fuses(Fuse Block Underhood)
IGN-1, VENT SOL, and SIR Fuses (Fuse Block Rear)
IGN-1, VENT SOL, and SIR Fuses (Fuse Block Rear)
Figure 12:

Controlled/Monitored Subsystem References


Object Number: 789191  Size: FS
Master Electrical Component List
Transmission Controls - A/T
Device Controls - EGR, IAC, and AIR
Engine Controls Schematic Icons
CCM, PCM Controls and Vehicle Speed Input
Generator Controls and Battery
Starter and Solenoid Controls
A/C Compressor Control (w/CJ2)
Traction Control (w/NW9)
Cooling Fans and Relays
Indicators
Figure 13:

Transmission Controls -- A/T


Object Number: 789192  Size: FS
Master Electrical Component List
Controlled/Monitored Subsystem References
Engine Controls Schematic Icons