| Go to the website below and find the number in the list. Look in the Reg column. If the letter is an F then it's a fed ECU. If the letter is a C then it's a Cali ECU. Because of where you're located (according to your profile) it will most likely be a fed ECU. But it could be either if the ECU has been replaced before. [ http://jimwolftechnology.com/wolfpdf/ECU-ID.PDF ]
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