Before getting started, pre-heat the oven to 350°F, and lightly coat your baking dish with cooking spray.
Dump the pie filling, spreading it evenly over the bottom of the pan.
Dump the dry cake mix over the pie filling, making sure it's spread evenly all around the pan.
Sprinkle the cinnamon evenly over the cake mix.
Then sprinkle chopped pecans over the cinnamon.
Thinly slice 2 sticks of butter over the entire top of the cake.
Bake at 350°F for about 1 hour, or until the cake turns a golden brown and the fruit filling is bubbly all around the edges.
Serve while warm or cold, with a big dollop of whipped cream or a scoop of vanilla ice cream.