Code P0513 - Incorrect Immobilizer Key

[WingsAA]

I have this code on my 2007 Suburban LTZ. Any clue as to why this would be thrown and more specifically what it's referring to?

From what I can tell it's thrown when the incorrect key is used.

 

[newTahoeguy]

You ever find a fix for this ?

 

[Fless]

You ever find a fix for this ?

This might help, but use the links at the top to get the correct vehicle.

https://charm.li/Chevrolet/2007/Suburban%202WD%20V8-5.3L/Repair%20and%20Diagnosis/A%20L%20L%20%20Diagnostic%20Trouble%20Codes%20%28%20DTC%20%29/Testing%20and%20Inspection/P%20Code%20Charts/P0513/