Place the boneless, skinless chicken breasts in the bottom of the crockpot.
In a bowl, mix together the dry ranch dressing mix, brown gravy mix, chicken broth, cream of chicken soup, garlic powder, onion powder, salt, and pepper. Stir until well combined.
Pour the gravy mixture over the chicken in the crockpot, ensuring the chicken is well coated.
Cover the crockpot with its lid and cook on low for 6 hours, or until the chicken is tender and fully cooked (internal temperature should reach 165°F or 74°C).
Once cooked, remove the chicken from the crockpot and shred it with two forks.
Return the shredded chicken to the gravy in the crockpot, stirring to combine.
Serve the chicken and gravy over rice, mashed potatoes, or egg noodles as desired.