I’ve never had a problem using a 12 point 24mm Sears socket on any of my fill plugs. I hold the socket and wrench against the plug with one hand and tap on the end of the wrench with a BFH. After a few hits the plug will loosen. Worked for me on three different cruisers.
Another idea is to use and impact driver with the 24mm socket on the end of it.
Another idea is to use and impact driver with the 24mm socket on the end of it.