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Home >> GMC >> 2001 >> Sierra 2500 HD, 2D Pickup, 6.6 1, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.6L - Repair Instructions >> Repair Instructions >> Engine Control Module Replacement >> Functional Check

Functional Check

  1. Clear any diagnostic trouble codes (DTCs).
  2. Perform the Diagnostic System Check-Engine Controls.
  3. Start the engine and idle the engine for 1 minute.
  4. Inspect for DTCs with a scan tool.
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