Brown Sugar Crock Pot Chicken

2 lbs. boneless chicken pieces
1 cup packed brown sugar
2/3 cup vinegar
1/4 up lemon lime soda
2-3 tablespoons minced garlic
2 tablespoons soy sauce
1 teaspoon black pepper
Place chicken pieces in your slow cooker. Combine remaining ingredients and pour over the top of chicken. Cover and cook on low for 6 to 8 hours. Serve with rice.