Preheat oven to 350 degrees. Spray 2 9×5 loaf pans with non stick cooking spray. (I like the bakers joy with flour for this.)
In a mixing bowl, mix the pumpkin, brown sugar, granulated sugar, oil, sour cream, eggs, molasses, vanilla extract, pumpkin pie spice, cinnamon and ground nutmeg together until well combined.
In a separate bowl, whisk together the flour, baking powder, baking soda and salt.
Add the dry ingredients to the wet mixture and mix gently (on low if you use a mixer) until just combined.
Stir in the chocolate chips.
Divide the mixture between both of the pans, (I like to sprinkle a few of the chocolate chips over the top so it looks pretty.)
Bake for 50 minutes.
Cool in the pan for 10-15 minutes, then run a knife around the edges and flip it out of the pans.
Allow to cool completely on wire racks before slicing.