COMBINE: Mix salad dressing, sugar, oil, vinegar, and salt together in a bowl and combine. Toss coleslaw mix and onion together, adding the salad dressing mixture on top. Toss to fully coat the coleslaw mix.
1/4 onion, diced, 2/3 cup creamy salad dressing, 1/3 cup granulated sugar, 3 tbsp oil, 1 tbsp white vinegar, salt, to taste, 16 oz bag coleslaw mix