In a large mixing bowl, add the ground turkey, bread crumbs, half of the taco sauce, diced green chiles, eggs, ½ cup of the Cheddar cheese, and seasonings, mixing well with your hands to thoroughly blend.
Coat the bottom of a 3½-quart, or larger, slow cooker, with cooking spray, and place the meat mixture into the center, shaping into a loaf. Top with remaining half of the taco sauce.
Cover and cook on low for 8 hours. Sprinkle with remaining ½ cup Cheddar cheese. Cover and cook for 15 minutes, until cheese is melted.