I went to fill up my truck and the gas cap was real hard to turn. I gave it a few minutes thinking maybe there was kind of vacuum holding it in place. When I went to turn it, it turned all the way around without releasing. Then the top half of it broke off leaving the threaded plug part still in the filler neck. Anyone have this problem before? I can't get the plug out of the filler neck, and the dealer won't have one until Wednesday sometime.