Preheat your oven to 325°F and grease two loaf pans.
In a large bowl, whisk together the flour, sugar, baking soda, baking powder, cinnamon, and salt.
In another bowl, beat the eggs and then mix in the grated zucchini, vegetable oil, and vanilla.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Fold in the chopped pecans.
Divide the batter evenly between the two loaf pans.
Bake for about 60 minutes or until a toothpick inserted into the center comes out clean.
Allow the bread to cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely.