Preheat oven to (350°F) = (176°C) degrees. Grease a 12-Cup Bundt Pan
After blending the cake mix and instant pudding with the eggs, oil, sour cream, and water, fold in the chocolate chips.
Blend the white sugar, brown sugar & cinnamon, and set aside. Pecan nuts are optional.
Scoop half of the batter into the Bundt pan and sprinkle 1/2 of the cinnamon mixture on top of the first layer of batter.
Spread the last of the batter and sprinkle the remaining cinnamon-sugar mixture on the top of the last layer of batter.
Use your spoon to partially blend the last of the cinnamon mixture into the batter.
Bake for about 55-60 minutes or until a toothpick comes out clean.