The key transponder worked with Autel KM100 using the "add key" process (not All Keys Lost) with 1 existing working/programmed GM key. Found a helpful video on youtube. Used on a 2018 Silverado 1500 LT. Used a local locksmith to have the actual blade cut to match existing GM blade, they charged $60 using this blank which I then used to program (add key) to my truck with the KM100. Also used the KM100 to program extra remotes/fobs to the 2018 Silverado, that part was pretty quick/easy. The key transponder programming was quick with the KM100, but the add-key process took a while and a bit convoluted, likely a GM security feature, etc. But I am glad it worked.