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

Power, Ground, Serial Data and MIL


Object Number: 1391398  Size: FS
Master Electrical Component List
5 Volt and Low Reference Bussing
Engine Controls Schematic Icons
L/H BEC BATT1, AUX PWR/CIGAR, PARK LPS, PCM BATT, PWR MIRROR, DR LOCK, TRUNK REL/RFA/Radio Amp Fuses and PWR SEAT Circuit Breaker
IGN SW-BATT2, WIPER, AIR BAG, TURN LPS, IGN MOD, B/U LP/BTSI, PCM IGN, F/P INJR, A/C BFC, AUTO TRANS, ABS/EVO/IGN Fuses
PCM ACC and IPC/BFC ACC Fuses
G102 and G104
G102 and G104
Data Link Connector (DLC) Schematics
Figure 2:

5-Volt and Low Reference Bussing


Object Number: 1391424  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors - Pressure and Temperature
Power, Ground, Serial Data and MIL
Engine Controls Schematic Icons
Figure 3:

Engine Data Sensors - Pressure and Temperature


Object Number: 1391426  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Heated Oxygen Sensors
5 Volt and Low Reference Bussing
Engine Controls Schematic Icons
Fuel Level and Oil Pressure
Figure 4:

Heated Oxygen Sensors


Object Number: 1391429  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Ignition System
Engine Data Sensors - Pressure and Temperature
Engine Controls Schematic Icons
IGN SW-BATT2, WIPER, AIR BAG, TURN LPS, IGN MOD, B/U LP/BTSI, PCM IGN, F/P INJR, A/C BFC, AUTO TRANS, ABS/EVO/IGN Fuses
IGN SW BATT1, ERLS, HTR-A/C and CRANK Fuses
IGN SW-BATT2, WIPER, AIR BAG, TURN LPS, IGN MOD, B/U LP/BTSI, PCM IGN, F/P INJR, A/C BFC, AUTO TRANS, ABS/EVO/IGN Fuses
Figure 5:

Ignition System


Object Number: 1391432  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Fuel Pump Controls
Heated Oxygen Sensors
Engine Controls Schematic Icons
IGN SW-BATT2, WIPER, AIR BAG, TURN LPS, IGN MOD, B/U LP/BTSI, PCM IGN, F/P INJR, A/C BFC, AUTO TRANS, ABS/EVO/IGN Fuses
Engine Controls Schematic Icons
Engine Controls Schematic Icons
G103 and G105
G103 and G105
Figure 6:

Fuel Pump Controls


Object Number: 1391433  Size: FS
Master Electrical Component List
Fuel System Description
Fuel Injectors
Ignition System
Engine Controls Schematic Icons
IGN SW-BATT2, WIPER, AIR BAG, TURN LPS, IGN MOD, B/U LP/BTSI, PCM IGN, F/P INJR, A/C BFC, AUTO TRANS, ABS/EVO/IGN Fuses
G103 and G105
G302
G103 and G105
G103 and G105
Figure 7:

Fuel Injectors


Object Number: 1391434  Size: FS
Master Electrical Component List
Fuel System Description
EVAP and IAC Controls
Fuel Pump Controls
Engine Controls Schematic Icons
IGN SW-BATT2, WIPER, AIR BAG, TURN LPS, IGN MOD, B/U LP/BTSI, PCM IGN, F/P INJR, A/C BFC, AUTO TRANS, ABS/EVO/IGN Fuses
Figure 8:

EVAP and IAC Controls


Object Number: 1391436  Size: FS
Master Electrical Component List
Evaporative Emission Control System Description
Controlled/Monitored Subsystem References
Fuel Injectors
Engine Controls Schematic Icons
IGN SW BATT1, ERLS, HTR-A/C and CRANK Fuses
Figure 9:

Controlled/Monitored Subsystem References


Object Number: 1391437  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Transmission Controls - A/T
EVAP and IAC Controls
Engine Controls Schematic Icons
Compressor Controls
Power and Ground
Fuel Level and Oil Pressure
Charging System
Transmission Solenoids, VSS and TCC Brake Switch
Cooling Fans - L61
Figure 10:

Transmission Control References - A/T


Object Number: 1261635  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Controlled/Monitored Subsystem References
Engine Controls Schematic Icons
Transmission Solenoids, VSS and TCC Brake Switch
Transmission Switches, TFT and A/T ISS Sensor
Transmission Switches, TFT and A/T ISS Sensor
PNP Switch