Preheat oven to 350 degrees and grease a 9x13" pan
Dump the sliced peaches and juice evenly into the greased 9x13" pan
Sprinkle the dry cake mix on top. (if using pecans sprinkle evenly over top of cake mix)
Evenly pour butter on top of cake mix.
Bake for approximately 45-55 minutes, until golden brown and bubbly.
Enjoy