Engine Controls Schematics. GMC Truck TopKick C-Series (Conventional) C4/C5 2003

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Mechanical - 8.1L 🢒 Engine Controls Schematics

Figure 1:	Module Power, Ground, Serial Data and MIL Master Electrical Component List Powertrain Control Module Description Engine Data Sensors - 5 Volt and Low Reference Engine Controls Schematic Icons Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars Underhood Fuse Block, PCM-B, HTD FUEL, A/C COMP, and RR DEFOG Fuses I/P Fuse Block, R-RR TRUCK, L-RR TRUCK, GAGES, and SIR Fuses/Circuit Breaker I/P Fuse Block, START and TRANS Fuses/Circuit Breakers Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker I/P Fuse Block, START and TRANS Fuses/Circuit Breakers I/P Fuse Block, START and TRANS Fuses/Circuit Breakers I/P Fuse Block, START and TRANS Fuses/Circuit Breakers Underhood Fuse Block, PCM-B, HTD FUEL, A/C COMP, and RR DEFOG Fuses I/P Fuse Block, R-RR TRUCK, L-RR TRUCK, GAGES, and SIR Fuses/Circuit Breaker Splice Pack SP203 (L18/LB7/LG4) G200, G202, and G203 - 1 of 4 G100 (L18)
Figure 2:	Engine Data Sensors - 5-Volt and Low Reference Master Electrical Component List Powertrain Control Module Description Fuse Block - Underhood Ignition A Relay Module Power, Ground, Serial Data, and MIL Engine Controls Schematic Icons
Figure 3:	Engine Data Sensors-Pressure and Temperature Master Electrical Component List Powertrain Control Module Description Engine Data Sensors-VSS Engine Data Sensors - 5 Volt and Low Reference Engine Controls Schematic Icons B+ Bus Bar Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker Underhood Fuse Block, ENG 4 and ENG 1 Fuses (L18/LB7) Underhood Fuse Block, ENG 4 and ENG 1 Fuses (L18/LB7) G200, G202, and G203 - 1 of 4
Figure 4:	Engine Data Sensors- VSS Master Electrical Component List Air Intake System Description Engine Data Sensors - Oxygen Sensors Fuse Block - Underhood Ignition A Relay Engine Controls Schematic Icons PNP Switch and Trans Opt Connector Instrument Panel Cluster - 2 of 2 Engine Controls Schematic Icons Engine Controls Schematic Icons
Figure 5:	Engine Data Sensors - Oxygen Sensors Master Electrical Component List Air Intake System Description Engine Data Sensors - Electronic Throttle Controls Engine Data Sensors-VSS Engine Controls Schematic Icons Underhood Fuse Block, ENG 3 and ENG 2 Fuses (L18) Ignition Switch, RUN and ACC/RUN Bus Bars BRAKE, CHASSIS, HTR/AC, and AXLE/4WD Fuses/Circuit Breakers G101 - 1 of 2
Figure 6:	Engine Data Sensors-Throttle Actuator Controls Master Electrical Component List Throttle Actuator Control (TAC) System Description Ignition Controls - Ignition Systems - 1 of 2 Engine Data Sensors - Oxygen Sensors Engine Controls Schematic Icons Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker I/P Fuse Block, BRAKE ISO Fuse/Circuit Breaker Cruise Control Switch (L18/LB7) G203 - 2 of 4
Figure 7:	Ignition Controls-Ignition System - 1 of 2 Master Electrical Component List Electronic Ignition (EI) System Description Ignition Controls - Ignition System - 2 of 2 Engine Data Sensors - Electronic Throttle Controls Engine Controls Schematic Icons Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars B+ Bus Bar Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker Ignition Controls - Ignition System - 2 of 2 Underhood Fuse Block, ENG 3 and ENG 2 Fuses (L18) G100 (LG4) G100 (LG4)
Figure 8:	Ignition Controls - Ignition System - 2 of 2 Master Electrical Component List Electronic Ignition (EI) System Description Ignition Systems - CMP and CKP Sensors Ignition Controls - Ignition Systems - 1 of 2 Engine Controls Schematic Icons Ignition Controls - Ignition Systems - 1 of 2 Ignition Controls - Ignition Systems - 1 of 2
Figure 9:	Ignition Systems - CMP and CKP Sensors Master Electrical Component List Knock Sensor (KS) System Description Fuel Controls - Fuel Pump Controls Ignition Controls - Ignition System - 2 of 2 Engine Controls Schematic Icons
Figure 10:	Fuel Controls - Fuel Pump Controls Master Electrical Component List Fuel System Description Fuel System - B3D Only Ignition Systems - CMP and CKP Sensors Engine Controls Schematic Icons B+ Bus Bar G112, G113, G203 - 4 of 4, G204, G205 and G400 G112, G113, G203 - 4 of 4, G204, G205 and G400
Figure 11:	Fuel Controls - Fuel Injectors Master Electrical Component List Fuel System Description Device Controls - EGR Valve and Solenoid Fuel System - B3D Only Engine Controls Schematic Icons Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker G100 (L18)
Figure 12:	Device Controls - EGR Valve and Solenoid Master Electrical Component List Powertrain Control Module Description Controlled/Monitored Subsystem Reference Fuel Controls - Fuel Injectors Engine Controls Schematic Icons Underhood Fuse Block, ENG 4 and ENG 1 Fuses (L18/LB7) Underhood Fuse Block, ENG 4 and ENG 1 Fuses (L18/LB7) Instrument Panel Cluster - 2 of 2 Blower Controls (C60) Starter and Charging System (LG4/LG5)
Figure 13:	Controlled/Monitored Subsystem References Master Electrical Component List Powertrain Control Module Description Controlled/Monitored Subsystem References Device Controls - EGR Valve and Solenoid Engine Controls Schematic Icons Instrument Panel Cluster - 1 of 2 Electronic Fan Controls, Coolant Level Switch Starting System (L18/LB7) Overdrive Defeat and CAN Serial Data Cruise Control Switch (L18/LB7)
Figure 14:	Controlled/Monitored Subsystem References Master Electrical Component List Powertrain Control Module Description Controlled/Monitored Subsystem Reference Engine Controls Schematic Icons Power Takeoff (LG4/L18/LB7) - 1 of 2 Module Power, Ground, Serial Data, MIL, VSS, and Torque Signals