So I am considering swapping my current 5.3 (LH6 Vortec 5300) for another 5.3, but newer. I have a 2007 NNBS with about 185k on it. I want to buy a new engine/possibly transmission for it because they are both starting to fall apart. The problem is, Chevrolet has about a thousand different engine blocks on their website. Does anybody have an idea of what engine will fit in my engine bay? The LS3 or 5.3 Ecotec look the most similar to me but I could be way off. I am going to call my local dealership tomorrow but I just wanted to have an initial idea of what I might be looking for before I call.
Thanks in advance.
Thanks in advance.
