Preheat oven to 375°F. Grease and flour 10-inch tube pan.
To prepare streusel filling, combine 2 tablespoons cake mix, brown sugar and cinnamon in medium bowl. Stir in pecans. Set aside.
To prepare cake, combine remaining cake mix, eggs, sour cream, oil, water and granulated sugar in large bowl. Beat at medium speed with electric mixer 4 minutes. Pour two-thirds of batter into pan. Sprinkle with streusel filling. Spoon remaining batter evenly over filling.
Bake at 375°F for 45 to 55 minutes, or until toothpick inserted in center comes out clean. Cool in pan 25 minutes. Invert onto serving plate. Cool completely.
For glaze, blend sugar and milk. Drizzle over cake.