Engine Controls Schematics. Chevrolet Express 2003

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 Express 🢒 Engine 🢒 Engine Controls - 4.8L, 5.3L, and 6.0L 🢒 Engine Controls Schematics

Figure 1:	Power, Ground, MIL and DLC Master Electrical Component List Powertrain Control Module Description 5 Volt Reference (4.8L, 5.3L, and 6.0L) OBD II Symbol Description Notice B+ Bus - Underhood Fuse Block IGN B Fuse O2A, O2B, SPARE, BTSI BU, PCM IGN 1, BTSI, and TRLR BU Fuses CRANK, IGN O, TBC ACC, FR WPR, BRKS, and HVAC Fuses CRANK, IGN O, TBC ACC, FR WPR, BRKS, and HVAC Fuses G103, G104, G105, G106, G300, and G301 Data Link Schematics
Figure 2:	5 Volt Reference Master Electrical Component List Powertrain Control Module Description Engine Data Sensors Power, Ground, MIL, and DLC OBD II Symbol Description Notice
Figure 3:	Engine Data Sensors Master Electrical Component List Powertrain Control Module Description Oxygen Sensors 5 Volt Reference (4.8L, 5.3L, and 6.0L) OBD II Symbol Description Notice IGN B Fuse ENG 1, and ENG 2 Fuses - 4.8L, 5.3L, and 6.0L ENG 1, and ENG 2 Fuses - 4.8L, 5.3L, and 6.0L Temperature/Pressure/Range Switches, and VSS Temperature/Pressure/Range Switches and VSS Cruise Control G103, G104, G105, G106, G300, and G301 Temperature/Pressure/Range Switches and VSS
Figure 4:	Oxygen Sensors Master Electrical Component List Powertrain Control Module Description Knock, CMP, CKP Sensors, and EGR Engine Data Sensors OBD II Symbol Description Notice IGN B Fuse
Figure 5:	Knock, CMP, CKP Sensors and EGR Master Electrical Component List Powertrain Control Module Description Ignition Controls - Page 1 of 2 Oxygen Sensors OBD II Symbol Description Notice
Figure 6:	Ignition Controls - Page 1 of 2 Master Electrical Component List Powertrain Control Module Description Ignition Controls - Page 2 of 2 Knock, CMP, CKP Sensors, and EGR OBD II Symbol Description Notice IGN B Fuse ENG 1, and ENG 2 Fuses - 4.8L, 5.3L, and 6.0L ENG 1, and ENG 2 Fuses - 4.8L, 5.3L, and 6.0L G102
Figure 7:	Ignition Controls - Page 2 of 2 Master Electrical Component List Powertrain Control Module Description Fuel Controls Ignition Controls - Page 1 of 2 OBD II Symbol Description Notice IGN B Fuse ENG 1, and ENG 2 Fuses - 4.8L, 5.3L, and 6.0L G102
Figure 8:	Fuel Controls Master Electrical Component List Powertrain Control Module Description Fuel Injection Controls Ignition Controls - Page 2 of 2 OBD II Symbol Description Notice B+ Bus - Underhood Fuse Block Gages G400 G102
Figure 9:	Fuel Injection Controls Master Electrical Component List Powertrain Control Module Description Fuel and Device Controls Fuel Controls OBD II Symbol Description Notice IGN B Fuse ENG 1, and ENG 2 Fuses - 4.8L, 5.3L, and 6.0L
Figure 10:	Fuel, EVAP, and Device Controls Master Electrical Component List Powertrain Control Module Description Controlled/Monitored Subsystem and Transmission Fuel Injection Controls OBD II Symbol Description Notice B+ Bus - Underhood Fuse Block TRLR STOP/TRN, CAN VENT,LH-LOBM, RH-LOBM, LH-HIBM, and RH-HIBM Fuses IGN B Fuse ENG 1, and ENG 2 Fuses - 4.8L, 5.3L, and 6.0L ENG 1, and ENG 2 Fuses - 4.8L, 5.3L, and 6.0L Gages Power, Ground, DLC and Indicator Cruise Control
Figure 11:	Controlled/Monitored Subsystem and Transmission Master Electrical Component List Powertrain Control Module Description Fuel and Device Controls OBD II Symbol Description Notice Compressor Controls (C60) Wheel Speed Sensors, VSS and Brake Pressure Switch Cruise Control Charging System Starting System Gages Indicators Temperature/Pressure/Range Switches, and VSS Temperature/Pressure/Range Switches and VSS Power, and Solenoid Valve Controls Power and Solenoid Valve Controls Power, and Solenoid Valve Controls Power and Solenoid Valve Controls