Place the chicken wings into the slow cooker, ensuring they are spread out evenly. Sprinkle the salt, pepper, and garlic powder over the wings to season them thoroughly. Pour 1 cup of barbecue sauce over the wings, making sure they are well-coated with sauce.
Cover with the slow cooker lid and set to cook on low heat for 3 to 4 hours. After cooking, add an additional cup of barbecue sauce, tossing the wings to give them a flavorful coating.
Serve these saucy, tender wings and enjoy!