slim jim

The problem I'm having is with the cruise ,on and I come to a hill it holds speed but coming down it will gain not correct . So I push the coast button and will not slow down I've also tried it on the flat and coast will not work .The accel botton and cancel does work . I'm think coast button is bad or the cruise servo? I have change the vaccum lines and I have no leaks thanks jim 1999 dodge ram 2500 quad cab 2wd 5.9 cummins stock 5 speed