I have a 89 Chevy Step Side, Short Box. Over the past six months or so the tail gate has been getting harder and harder to open til finally this pastweek I could not get it to open. I had to use a set of channel lock pliers to squeeze the hinges to help open the gate. It appears that when I go to lift the latch it doesn't move the hinges enough to open the right hand side latch. How in the world does someone get inside the tail gate to fix this problem?