I have a 2017 GMC Sierra slt Texas edition. Didn’t come equipped with the electric running boards but bought the oem factory ones from someone I met. I been looking around for someone who can wire them up for me, my issue is I can’t seem to find anyone to do it. They say I need the harness, which I don’t have . I’ve taken the running boards to gm & they inform me there’s “no way” they can do it unless I buy the “whole kit” from them. I’ve also went to other professionals who “specialize” in that area, but I’m getting the same response from everyone.that since my truck did not come equipped with the electric running boards my truck does not have the bdm module & can’t be done.. but I did find something on YouTube where a guy in a similar situation installed some factory running boards on his truck which did not come equipped with them.. he made his own harness & did his thing ‘ they work perfectly fine.. can anyone give me some good & simple feedback on this issue, it is greatly appreciated. Thanks in advance.