Heat oven to 350°F (175°C). Grease a 9x13 dish and set it on a foil-lined baking sheet.
Press 2 pie crusts into the bottom of the dish. Prick with a fork and bake 10 minutes until dry and pale golden.
Whisk corn syrup, brown sugar, granulated sugar, eggs, cooled melted butter, vanilla and salt until smooth. Stir in pecans.
Pour half the filling over the bottom crust.
Cut 1 crust into wide strips and lay over the filling.
Pour remaining filling over the strips. Top with strips from the last crust and sprinkle with sugar.
Bake 45–55 minutes until edges bubble and the center only slightly jiggles (about 200°F). Tent with foil if the top browns too fast.
Cool at least 1 hour before serving.