Everybody has their own recipes for dump cake, some with coconut and some with nuts etc. My family likes the more simple ones and each member has a favorite. My son in law likes blueberry, my daughter likes peach, I like blackberry, and the grandchildren ... well, strawberry is their go to fave!! They like it a'la mode.
In a 9×13 inch pan, pour the pie filling over the bottom. Sprinkle the pineapple plus juice over the pie filling. Pour the dry cake mix over this and level the powder. Pour melted butter over the top and use te back of a spoon to make sure the butter gets all over (no dry powder spots).
Bake in a preheated 350 degree oven for 30-45 minutes. Now this will not be a dry cake so a cake tester will not work. The crust will be a deep golden brown and a little fruit juice may be bubbling up around the edges. I like to serve this warm and the family must have ice cream on it.