Preheat oven to 350°.
Spray a loaf pan with cooking spray and set aside.
In a large bowl, cream together sugar, eggs, pumpkin and oil.
In another medium bowl, whisk together flour, baking soda, salt, cinnamon, nutmeg, and ginger.
Add dry ingredients into wet ingredients and mix until just combined.
Gently stir in chocolate chips.
Pour into loaf pan and set aside.
For streusel, combine butter, brown sugar, flour and cinnamon.
Sprinkle evenly over batter and bake for 55-60 minutes.
Let it cool for 10 minutes then turn out onto rack and cool completely.