Pam, I wondered how your truck is smelling?!
I borrowed my dad's van while I was dog sitting and a bag of ice leaked and then smelled like mildew. YUCK. My mom told me not to worry b/c it is just a work van, but I sprinkled Arm and Hammer Carpet Fresh all over the back of it (seat was removed) and put it in my garage and put a fan on it over nite. Let it dry.
Then I took my sweeper and swept it out, (course then I armor alled everything and washed the windows. Then got a Glad or Renuzit air freshener that was "SUPER ODOR KILLER" and put that it in there. It made a big difference!!