Mix all ingredients except chopped pecans and cinnamon topping.
In a separate bowl mix cinnamon topping with ½ cup chopped pecans.
Spray crock with cooking spray.
Pour in ½ of cake mix and top with cinnamon topping/ pecan mix, then repeat once more.
Cover and cook on high for about 2 hours then remove lid and turn the slow cooker off.
Let the cake set up for about 15 minutes, then serve!