I own an LX model. Little confused on the tailgate operation. I know it does not have a smart tailgate. But there is a button on the key fob, that if you hold, it is supposed to "pop" the tailgate or unlock it.. I think anyway. When I hold down the button, the lights flash but that's it. The tailgate is not unlocked. Is it supposed to do anything on the LX model from the key fob?