Golden Butter Bundt Cake

1 Duncan Hines Golden Butter cake mix
1/2 cup granulated sugar
4 eggs
3/4 cup vegetable oil
8 ounces sour cream
4 tablespoons brown sugar
2 teaspoons cinnamon
1 cup pecans

Combine cake mix, sugar, oil, eggs and sour cream. Mix well. Mix together the brown sugar, cinnamon and pecans. Place one-third of the cinnamon mixture in the bottom of a greased Bundt pan. Add one-half of the batter. Add another one-third of the mixture, the remaining batter and end with the mixture. Bake at 350 degrees F for 45 minutes to 1 hour.