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Home >> Chevrolet >> 2007 >> TrailBlazer 5.3 M, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 5.3L - DTC P0351 To DTC P3449 >> DTC P0420 or P0430 >> DTC Descriptors

DTC Descriptors

DTC P0420: Catalyst System Low Efficiency Bank 1
DTC P0430: Catalyst System Low Efficiency Bank 2

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