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Originally Posted by DM72C20
Just checking in if anyone has this swap working with a Gen IV engine? I've got an 09 4.8 going into my 72 C20 and was contemplating this gauge swap, but saw that it might not work. Thanks from social distancing in Toronto.
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I have not personally messed with a lot of GenIV engines, other than one L99, but from what I have read, they don't have a dedicated speed signal going to the instrument cluster as its all on the CAN bus. When I did the L99 harness I believe there was a place to add a wire for a speedo but you needed to have it programmed to work, which we didn't do. So unless you can figure out that way to get that signal out of the ECM, then I am going to guess that this wont work for you.