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

Module Power, Ground, Serial Data, and MIL


Object Number: 744240  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors - Pressure and Temperature
OBD II Symbol Description Notice
AIR, RADIO, ECM B, FRT HVAC, and CIGAR Fuses
ECM 1, ETC, INJ A and INJ B Fuses
RTD, RDO AMP, CRANK, and IGN 0 Fuses
Splice Pack SP205
RTD, RDO AMP, CRANK, and IGN 0 Fuses
IGN 1, SEO IGN, and AIR BAG Fuses
IGN 1, SEO IGN, and AIR BAG Fuses
Indicators and Serial Data
G103, G105, and G106
Figure 2:

Engine Data Sensors - Pressure and Temperature


Object Number: 744242  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors - MAF and VSS
Module Power, Ground, Serial Data and MIL
OBD II Symbol Description Notice
Figure 3:

Engine Data Sensors - MAF and VSS


Object Number: 744277  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors - HO2S
Engine Data Sensors - Pressure and Temperature
OBD II Symbol Description Notice
O2 B, O2 A, ENG 1, and IGN E Fuses
G103, G105, and G106
Gages, VSS, and Engine Oil Signals
Vehicle Speed Signal and 4WD Low Signal
Figure 4:

Engine Data Sensors - HO2S


Object Number: 744248  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors - Electronic Throttle Controls - APP Sensor
Engine Data Sensors - MAF and VSS
OBD II Symbol Description Notice
O2 B, O2 A, ENG 1, and IGN E Fuses
G104
Figure 5:

Engine Data Sensors - Electronic Throttle Controls - Accelerator Pedal Position Sensor


Object Number: 744276  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors - Electronic Throttle Controls - TAC Motor and TP sensor
Engine Data Sensors - HO2S
OBD II Symbol Description Notice
Power, Cruise Control On/Off Switch, Stop Lamp Switch Input, TAC Module, APP Sensor (w/ETC)
Figure 6:

Engine Data Sensors - Electronic Throttle Controls - TAC Motor and TP Sensor


Object Number: 744252  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Ignition Controls - Cylinders 2, 4, 6, and 8
Engine Data Sensors - Electronic Throttle Controls - APP Sensor
OBD II Symbol Description Notice
ECM 1, ETC, INJ A and INJ B Fuses
G103, G105, and G106
Figure 7:

Ignition Controls - Cylinders 2, 4, 6, and 8


Object Number: 744253  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Ignition Controls - Cylinders 1, 3, 5, and 7
Engine Data Sensors - Electronic Throttle Controls - TAC Motor and TP sensor
OBD II Symbol Description Notice
ECM 1, ETC, INJ A and INJ B Fuses
G104
Figure 8:

Ignition Controls - Cylinders 1, 3, 5, and 7


Object Number: 744254  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Ignition Controls - Sensors
Ignition Controls - Cylinders 2, 4, 6, and 8
OBD II Symbol Description Notice
ECM 1, ETC, INJ A and INJ B Fuses
G103, G105, and G106
Figure 9:

Ignition Controls - Sensors


Object Number: 744255  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Fuel Controls - Fuel Pump Controls
Ignition Controls - Cylinders 1, 3, 5, and 7
OBD II Symbol Description Notice
Gages, VSS, and Engine Oil Signals
Figure 10:

Fuel Controls - Fuel Pump Controls


Object Number: 744260  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Fuel Controls - Fuel Injectors
Ignition Controls - Sensors
OBD II Symbol Description Notice
AIR, RADIO, ECM B, FRT HVAC, and CIGAR Fuses
O2 B, O2 A, ENG 1, and IGN E Fuses
O2 B, O2 A, ENG 1, and IGN E Fuses
G103, G105, and G106
Fuel Gauge and Fuel Pump and Sender Assembly
Figure 11:

Fuel Controls - Fuel Injectors


Object Number: 744261  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Fuel Controls - EVAP Controls and EGR
Fuel Controls - Fuel Pump Controls
OBD II Symbol Description Notice
ECM 1, ETC, INJ A and INJ B Fuses
ECM 1, ETC, INJ A and INJ B Fuses
Figure 12:

Fuel Controls - EVAP Controls and EGR


Object Number: 744263  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Controlled/Monitored Subsystem References
Fuel Controls - Fuel Injectors
OBD II Symbol Description Notice
O2 B, O2 A, ENG 1, and IGN E Fuses
O2 B, O2 A, ENG 1, and IGN E Fuses
O2 B, O2 A, ENG 1, and IGN E Fuses
Figure 13:

Controlled/Monitored Subsystem References


Object Number: 744264  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Transmission Controls A/T
Fuel Controls - EVAP Controls and EGR
OBD II Symbol Description Notice
A/C Compressor Controls
A/C Compressor Controls
Air Delivery Controls - Primary, Recirculation Actuator
Power, Ground, Data Link Connector (DLC)
Charging System
Power, Ground and Transfer Case Encoder Motor
Power, Ground, Class 2 Communication - w/Traction Assist
Gages, VSS, and Engine Oil Signals
2002 Engine Cooling
Figure 14:

Transmission Controls A/T


Object Number: 744265  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Controlled/Monitored Subsystem References
OBD II Symbol Description Notice
Switch Inputs
Switch Inputs
Tow/Haul and PNP Switch Inputs
Switch Inputs
Switch Inputs
Valve Controls and Brake Switch