1. Cook macaroni according to package directions. Drain macaroni and rinse with.
2. cold water. Drain again.
3. In a mixing bowl, combine cooked macaroni, cheese, celery, green bell pepper, peas, and onion. Stir gently to combine.
4. For dressing: Mix mayonnaise or salad dressing, sour cream, milk, pickle.
5. relish, and 1/4 teaspoon salt. Toss dressing with macaroni mixture.
6. Cover and chill for 4 to 24 hours. If necessary, stir in a small amount of additional milk.