Originally Posted by NISR20MO

I am still waiting on my harness as they are being produced currently. Yes it works with the options you select, so if you pick T56 only it will work with that. The ECU I was going to originally use was a OEM PCM commonly reffered to as a "411" ecu/pcm, whatever you prefer. The harness as it is designed plugs into almost any ECU that you will find controlling a Gen III/IV LSx or truck motor in most any newer GM.

The ECU I have is a standalone by AEM that directly replaces the stock factory ECU/PCM.

I am building a L33 5.3 truck motor. I suggest you look at silviav8forums.com and ls1tech.com and even performancetrucks.com for some helpful info about the motors. And also to get a good understanding of what is involved in the swap.