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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics - 4.3L >> Diagnostic Tests >> DTC P0420 Or P0430: TWC System - Low Efficiency (Bank 1 & 2) >> Notes

DTC P0420 Or P0430: TWC System - Low Efficiency (Bank 1 & 2): Notes

NOTE: To locate components, see COMPONENT LOCATIONS . For circuit reference, see WIRING DIAGRAMS . For connector terminal identification, see CONNECTOR IDENTIFICATION .
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