Bring a large pot of lightly salted water to the boil. Stir in pasta and cook for 10 to 12 minutes or until al dente; drain.
Place bacon in a frying pan over medium-high heat and cook until evenly brown. Drain and chop.
In a large bowl, mix mayonnaise, Ranch dressing mix, garlic granules and garlic pepper. Stir in milk until smooth. Place bacon, tomato, black olives and cheese in bowl and toss to coat with dressing. Cover and chill at least 1 hour in the refrigerator. Toss with additional milk if the salad seems a little dry.