Preheat oven to 350°F (180°C). Spray two 9X5 inch loaf pans with butter-flavored cooking spray. Set aside.
Blend yogurt, sour cream, pumpkin, eggs and vegetable oil in a large mixing bowl. Add flour, SPLENDA® Granulated, baking powder and pumpkin pie spice. Stir well. Add raisins and walnuts. Stir until just blended.
Spread batter into prepared pans. Bake 45-50 minutes or until a toothpick inserted in the center comes out clean.
Cool and cut each loaf into eight thick slices.
Amount per serving (1 slice): Total Calories: 174, Calories from Fat: 54, Total Fat: 6 g, Cholesterol: 40 mg, Sodium: 141 mg, Total Carbohydrates: 27 g, Dietary Fiber: 2 g, Protein: 5 g