Preheat oven to 350°F - spray a bundt pan generously with baking spray. Set aside.
Mix cake mix, dry vanilla pack, sugar, cinnamon, and pumpkin pie spice together in a large bowl.
Add water and pumpkin to the bowl. Mix all until well incorporated.
Then mix in eggs. Then add sour cream. Mix with spoon until well combined.
Pour into well-greased bundt pan.
Bake at 350°F for 55-60 minutes until cake springs back to the touch.Remove from oven. Let cool before frosting.