PREHEAT oven to 425° F. If using frozen pie shell, place on baking sheet.
COMBINE pumpkin pie mix, evaporated milk, eggs and 1 teaspoon orange peel in large bowl. Pour into pie shell.
BAKE for 15 minutes. Reduce oven temperature to 350°F. Bake for 50 to 60 minutes or until knife inserted near center comes out clean. Cool on wire rack for 10 minutes.
COMBINE sour cream, sugar and remaining 1 1/2 teaspoons orange peel in medium bowl. Carefully spread over top of pie.
BAKE for an additional 8 minutes. Cool on wire rack for 1 hour. Refrigerate for 2 hours.