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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1607 (Data Communication System) >> Diagnostic Information and Procedures >> DTC C0550 >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  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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