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Engine Controls/fuel - 4.3l - Wiring Schematic Diagrams GMC Sierra 2500

Testing & Diagnostics 11 illustrations

Scheme 64

Scheme 64: Module Power, Ground, Serial Data And MIL

Scheme 65

Scheme 65: 5V1 And 5V2 And Low Reference Bus

Scheme 66

Scheme 66: Engine Data Sensors - Pressure and Temperature

Scheme 67

Scheme 67: Engine Data Sensors - Heated Oxygen Sensors

Scheme 68

Scheme 68: Engine Data Sensors - Throttle Controls

Scheme 69

Scheme 69: Ignition Controls - Ignition Control Module

Scheme 70

Scheme 70: Ignition Controls - Sensors

Scheme 71

Scheme 71: Fuel Controls - Fuel Pump

Scheme 72

Scheme 72: Fuel Controls - Fuel Injectors

Scheme 73

Scheme 73: Fuel Controls - EVAP Controls

Scheme 74

Scheme 74: Controlled/Monitored Subsystem References