Engine Controls Schematics

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Module Power, Ground, Serial Data, and MIL

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Fig 2: Fuse Block - Underhood, IGN 1 Relay

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Fig 3: Engine Data Sensors - 5-Volt and Low Reference

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Fig 4: Engine Data Sensors - Pressure, Temperature, and VSS

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Fig 5: Engine Data Sensors - Oxygen Sensors

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Fig 6: Engine Data Sensors - Throttle Actuator Controls

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Fig 7: Ignition Controls - Ignition System Coils 1, 3, 5, 7

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Fig 8: Ignition Controls - Ignition System Coils 2, 4, 6, 8

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Fig 9: Ignition Controls - Sensors

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Fig 10: Fuel Controls - Fuel Pump Controls and Fuel Injectors

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Fig 11: Fuel Controls - EVAP Controls

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Fig 12: Controlled/Monitored Subsystem References

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Fig 13: Transmission Control References - A/T

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