Hello - How's it going?

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Hello,

I'm trying to find "just the right software" to program these two LS engines (stock GM computers) that I have. They are almost identical, cabled and the other is drive by wire but both are 5.3l, one is from a 2002 Silverado 2500HD and the other is from a 2008 Yukon (I believe). They are for LS swapping; one will go into my 65 Impala, and the other will go in my 85 Trans Am. I'm hoping I can get some guidance here.

One thing I need to do is remove the GM Passlock security stuff so I can actually "run" the engines. Then I need to program one for twin turbos (once I get them installed and running).

I'll be creating another thread for all my questions regarding these engines and computers.