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Home >> GMC >> 1999 >> Envoy >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes - DTC P0453-P0656 >> DTC P0602 >> DTC P0602: ECM Not Programmed (3.0L "V" Body) >> Circuit Description

Circuit Description

This DTC indicates that ECM's internal EEPROM has not been flashed with any vehicle software, or an error occurred during programming.

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