In a small bowl, mix the ranch seasoning, Italian dressing mix and brown gravy mix.
Pat roast dry then rub the seasoning mixture over the entire roast.
Place in a 5-7 quart slow cooker and pour the water around the roast.
Add the carrots and potatoes, if using.
Cover and cook on low 7-10 hours, high 4-7 hours. !!TIMES ARE APPROXIMATE AND DEPEND ON THE SHAPE/THICKNESS OF THE ROAST!!
To thicken gravy, mix 2 tbs flour with 3 tbs water for EACH cup of pan juice. Place the pan juices in a small saucepan and heat to boiling. Add the flour/water mixture and stir until thick. Bring to a boil, then reduce heat to simmer and cook for about 5 minutes
Use the dressing mixes DRY. Do not make up like a salad dressing.