yes it was for no vats for engine swap into a vehicle that didnt have a ls. if switching to a 7603 os (operating system) you will need a new eletric foot pedal and module. 2006 is different for the os you have. truck will not responde well. may need to swap something with throttle body or injectors to match the 7603 os. 7603 is the only xdf i know of for the p59 pcm 1mb memory.
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