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Home >> Chevrolet >> 2009 >> TrailBlazer 4.2 S, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.2L - DTC P0366 T0 DTC P2544 >> DTC P0685 or P0690 >> DTC Descriptors

DTC Descriptors

DTC P0685

Engine Controls Ignition Relay Control Circuit

DTC P0690

Engine Controls Ignition Relay Feedback Circuit High Voltage

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