Preheat oven to 325 degrees F. Spray two 8x4 inch bread pans with cooking spray.
Wash and dry zucchini and peel. Grate the zucchini until you have 2 cups. Wrap the grated zucchini is some paper towels and squeeze to remove excess moisture.
In a large bowl, sift together flour, pumpkin pie spice, salt, baking soda, and baking powder.
Beat together eggs, sugar, vegetable oil, pumpkin, and vanilla in a second bowl until mixed.
Pour wet ingredients into the flour bowl and mix until combined.
Gently fold in the zucchini and chocolate chips.
Divide batter between the two greased bread pans.
Bake in a 325 degree oven until the middle is fully cooked about 50 minutes. Test by inserting a toothpick in the center of the bread. If it comes out clean, the bread is ready.
Remove from oven and let cool before removing them from the pans.