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

Power, Ground, Serial Data, DIC and Indicator


Object Number: 1470720  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Engine Data Sensors - 5 volt and Low References Busses
Engine Controls Schematic Icons
Underhood Fuse Block B+ Bus - 2 of 2
Underhood Fuse Block DIM/ALDL, VOLT CHECK, FLASHER, CCP, EGM/TCM and ABS Fuses
Ignition Switch - 2 of 2
Ignition Switch - 2 of 2
Underhood Fuse Block STARTER Relay, IGN 1 Relay, HTR VLV/CLTCH and TCM/IPC Fuses
Underhood Fuse Block STARTER Relay, IGN 1 Relay, HTR VLV/CLTCH and TCM/IPC Fuses
G104 - 1 of 2
Ignition Switch - 1 of 2
Engine Data Sensors - Throttle Actuator Control (TAC) System
Class 2 Serial Data Bus - LHD - 1 of 2
Class 2 Serial Data Bus - LHD - 2 of 2
G140, G141 and G142 (L56)
G140, G141 and G142 (L56)
G140, G141 and G142 (L56)
G104 - 1 of 2
Figure 2:

Engine Data Sensors - 5-Volt and Low Reference Buses


Object Number: 1470721  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Engine Data Sensors - MAP, ECT, MAF and IAT Sensors
Power, Ground, Serial Data, DIC and Indicator
Engine Controls Schematic Icons
Figure 3:

Engine Data Sensors - MAP, ECT, MAF and IAT Sensors


Object Number: 1470722  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Engine Data Sensors - Heated Oxygen Sensors (HO2S)
Engine Data Sensors - 5 volt and Low References Busses
Engine Controls Schematic Icons
Underhood Fuse Block B+ Bus - 2 of 2
Underhood Fuse Block STARTER Relay, IGN 1 Relay, HTR VLV/CLTCH and TCM/IPC Fuses
G104 - 1 of 2
Underhood Fuse Block WASH NOZ, STRG CTLS and IGN MOD/MAF Fuses
G104 - 1 of 2
G140, G141 and G142 (L56)
Figure 4:

Engine Data Sensors - Heated Oxygen Sensors (HO2S)


Object Number: 1470723  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Engine Data Sensors - Throttle Actuator Control (TAC) System
Engine Data Sensors - MAP, ECT, MAF and IAT Sensors
Engine Controls Schematic Icons
Module Power, Ground, Serial Data, and MIL
Underhood Fuse Block B+ Bus - 2 of 2
Underhood Fuse Block B+ Bus - 2 of 2
Underhood Fuse Block PRE 02/CAM Fuse
Figure 5:

Engine Data Sensors - Throttle Actuator Control (TAC) System


Object Number: 1470724  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Ignition Controls - Odd Ignition Coils
Engine Data Sensors - Heated Oxygen Sensors (HO2S)
Engine Controls Schematic Icons
Underhood Fuse Block STARTER Relay, IGN 1 Relay, HTR VLV/CLTCH and TCM/IPC Fuses
Underhood Fuse Block STARTER Relay, IGN 1 Relay, HTR VLV/CLTCH and TCM/IPC Fuses
Underhood Fuse Block STARTER Relay, IGN 1 Relay, HTR VLV/CLTCH and TCM/IPC Fuses
BPP Sensor, Switches and Indicators 5.7L
Cruise Control System - 5.7L (L56)
Steering Wheel Controls - 5.7L (L56)
G140, G141 and G142 (L56)
Figure 6:

Ignition Controls - Odd Ignition Coils


Object Number: 1470725  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Ignition Controls - Even Ignition Coils
Engine Data Sensors - Throttle Actuator Control (TAC) System
Engine Controls Schematic Icons
Module Power, Ground, Serial Data, and MIL
Underhood Fuse Block ODD INJ/COIL Fuse
Underhood Fuse Block ODD INJ/COIL Fuse
G140, G141 and G142 (L56)
Figure 7:

Ignition Controls - Even Ignition Coils


Object Number: 1470726  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Ignition Controls - Knock, CKP and CMP Sensors
Ignition Controls - Odd Ignition Coils
Engine Controls Schematic Icons
Module Power, Ground, Serial Data, and MIL
Underhood Fuse Block EVEN INJ/COIL Fuse
Underhood Fuse Block EVEN INJ/COIL Fuse
G140, G141 and G142 (L56)
Figure 8:

Ignition Controls - Knock, CKP and CMP Sensors


Object Number: 1470727  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Fuel Controls - Fuel Injectors, Fuel Pump and Sender Assembly
Ignition Controls - Even Ignition Coils
Engine Controls Schematic Icons
Figure 9:

Fuel Controls - Fuel Injectors and Fuel Pump and Sender Assembly


Object Number: 1470730  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Fuel Controls - EVAP Controls
Ignition Controls - Knock, CKP and CMP Sensors
Engine Controls Schematic Icons
Module Power, Ground, Serial Data, and MIL
Underhood Fuse Block ODD INJ/COIL Fuse
Underhood Fuse Block B+ Bus - 2 of 2
Right Rear Fuse Block B+ Bus
G401
Gages - 5.7L (L56)
Figure 10:

Fuel Controls - EVAP Controls


Object Number: 1470731  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Controlled/Monitored Subsystem References
Fuel Controls - Fuel Injectors, Fuel Pump and Sender Assembly
Engine Controls Schematic Icons
Module Power, Ground, Serial Data, and MIL
Underhood Fuse Block Cooling Fan Fuses/Relays, MAIN Relay, ECM and TOS Fuses
Underhood Fuse Block Cooling Fan Fuses/Relays, MAIN Relay, ECM and TOS Fuses
Right Rear Fuse Block DR MOD PWR Circuit Breaker, CANISTER VENT, RIM/IGN SW, R FRT HTD SEAT MOD, and POWER SOUNDER Fuses
Engine Data Sensors - 5 volt and Low References Busses
Figure 11:

Controlled/Monitored Subsystem References


Object Number: 1470732  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Control Module References
Fuel Controls - EVAP Controls
Engine Controls Schematic Icons
Starting System - 2.8L/3.6L (LP1/LY7)
BPP Sensor, Switches and Indicators - 2.8L/3.6L (LP1/LY7)
Cooling Fans 5.7L (L56)
Engine OIl Pressure (EOP) Sensor, Engine Oil Level/Temperature Sensor, TFT and Indicator
A/C Compressor Controls 5.7L
Manual Transmission (M12)