Re: Transmission option for LSx swap
I wish I could help, but my 2008 5.3L / 4L60E had a separate TCM. I'm not sure if 2004 was the same. I would think that the 4L60E would be easier to install. It's just plug and play. The 700R4 would require a TV cable, which could prove difficult to hook up with a DBW system. Just my $.02.
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