First be sure to give your slow cooker a light coat of cooking spray to prevent sticking and burning.
Dump the pie filling and evenly spread it in the bottom of your CrockPot.
Next sprinkle the dry cake mix, and spread it evenly all over the top of the pie filling.
Sprinkle cinnamon over the dry cake mix.
Sprinkle chopped pecans over the cinnamon and dry cake mix.
Slice cold butter all over the top of the cake.
Cover and cook on high for 2-3 hours, or on low for 5-6 hours. You'll know it's fully cooked when the butter has melted and transformed the dry cake mix into a golden crust, and the mixture is bubbly.
Scoop it out and serve it with your favorite toppings.