01 - 
                Place chicken breasts evenly in the slow cooker base to prepare for cooking.
              
              
              
                02 - 
                In a bowl, whisk together cream of chicken soup, chicken gravy mix, and chicken broth until smooth.
              
              
              
                03 - 
                Pour the gravy mixture over the chicken in the slow cooker. Set to low heat and cook for 6 to 8 hours until chicken is tender.
              
              
              
                04 - 
                Using two forks, shred the chicken directly in the slow cooker to allow absorption of gravy.
              
              
              
                05 - 
                Stir sour cream into the shredded chicken and gravy mixture. Season with salt and pepper to taste before serving.