Preheat oven to 350°F. Line a 9″x13” pan with parchment.
In a large bowl, combine cake mix and pumpkin puree and whisk until smooth. Spread batter into prepared pan.
Bake until a toothpick inserted into the middle of the cake comes out clean, 27–30 minutes.
Let the cake cool completely.
Using the back of a wooden spoon, poke holes all over the surface of the cake. Pour caramel to fill the holes. Spread Cool Whip all over the top of the cake, then sprinkle with pumpkin pie spice and drizzle with more caramel. Sprinkle with chopped pecans.