Preheat the oven to 325°F.
In a medium bowl, combine graham cracker crumbs and melted butter. Press the mixture firmly into the bottom and up the sides of a 9-inch pie pan to form the crust.
Bake for 10 minutes, then remove from the oven and let cool slightly.
In a large mixing bowl, beat the softened cream cheese with ¾ cup of granulated sugar until smooth and creamy.
Add the vanilla extract and mix until combined.
Add the eggs one at a time, mixing well after each addition.
Stir in the sour cream, remaining ¼ cup of sugar, and ground cinnamon until fully incorporated.
Fold in the chopped pecans gently.
Pour the cheesecake mixture into the prepared crust and spread evenly.
Bake for 45-50 minutes, or until the center is set but still slightly jiggly.
Turn off the oven and leave the pie inside for an additional 30 minutes to cool gradually.
Remove the pie from the oven and let it cool to room temperature.
Refrigerate for at least 4 hours, or overnight, before serving.