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Home >> Cadillac >> 2009 >> Escalade EXT >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC C0550 >> Circuit/System Verification
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Circuit/System Verification

  1. With a scan tool, clear DTC C0550. The DTC should clear.
    • If the DTC will not clear, replace the control module.
  2. Ignition OFF, remove the scan tool, open and close the drivers door.
  3. Wait 60 seconds, ignition ON, then recheck for DTCs. DTC C0550 should not set.
    • If DTC C0550 sets, replace the module.
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