Preheat the oven to 350 degrees F (175 degrees C).

Spread cherry pie filling over the bottom of a 9x13-inch baking pan. Stir cake mix and butter together into a gooey, clumpy mixture. Break into pieces between your fingers and crumble evenly on top of the cherry filling. Sprinkle chopped pecans evenly on top.

Bake in the preheated oven until fruit is bubbling and dump cake is golden brown on top, 35 to 40 minutes.