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Home >> GMC >> 1998 >> Forward Control 6.5 F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes - Introduction >> Self-Diagnostic System >> Clearing Diagnostic Trouble Codes (DTCS)

Clearing Diagnostic Trouble Codes (DTCS)

To clear DTCs from memory, use scan tool, following scan tool manufacturer's instructions. Codes may also be cleared by disconnecting power supply to ECM/PCM/VCM for at least 30 seconds.