Preheat oven to 350°F.
In a food processor, blend the graham crackers and pecans until finely chopped.
Stir in butter and sugar until well combined and press into the bottom of a 13×9 pan.
Bake for 8 minutes and cool completely on a wire rack.
In a large bowl, using a hand mixer, beat cream cheese and powdered sugar until smooth.
Using 1 container of cool whip, add in 1 cup and mix well until there are are no lumps.
Fold in the remaining whipped topping from the 1st container.
Spread the cream cheese mixture over the cooled crust.
Top with the blueberry pie filling.
Add the remaining container of whipped topping spreading to the edges evenly.
Garnish with chopped pecans.
Cover and chill for at least 2 hours or overnight before serving.