Ok, I found a few recipes on my favorite site (Allrecipes.com), that have the method you mentioned: Warming vineger and sugar in a sauce pan, no mayo. All have different seasonings, so you may have to play around to find the right combo of seasons.
1) Tangy Coleslaw
Ingredients
6 cups shredded cabbage
2 medium carrots, shredded
4 celery ribs,
chopped 1/2 cup finely chopped green pepper
1/2 cup finely chopped onion
1/2 cup cider vinegar
1/4 cup vegetable oil
1/4 cup sugar
1 1/2 teaspoons salt
1/4 teaspoon pepper
1/4 teaspoon paprika
Directions
In a large bowl, combine the cabbage, carrots, celery, green pepper and onion. In a jar with a tight-fitting lid, combine the vinegar, oil, sugar, salt, pepper and paprika; shake well. Pour over cabbage mixture and toss to coat. Cover and refrigerate until serving
2) German Coleslaw
Ingredients
1 medium head cabbage, finely shredded
3 green onions, sliced
3/4 cup sugar
3/4 cup vinegar
1 1/2 teaspoons celery seed
1 1/2 teaspoons salt
3/4 cup vegetable oil
Directions
In a large bowl, combine cabbage and onions. In a saucepan, mix sugar, vinegar, celery seed and salt; bring to a boil. Add oil; return to boiling and cook until sugar dissolves. Pour over cabbage; toss gently. Chill.
3) Amish Coleslaw
Ingredients
1 medium head cabbage, cored and shredded
1 medium onion, finely chopped
1 cup sugar
1 cup vinegar
1 teaspoon salt
1 teaspoon celery seed
1 teaspoon sugar
1 teaspoon prepared mustard
3/4 cup vegetable oil
Directions
In a large bowl, toss together the cabbage, onion, and 1 cup sugar. In a small saucepan, combine the vinegar, salt, celery seed, 1 teaspoon sugar, mustard and oil. Bring to a boil, and cook for 3 minutes. Cool completely, then pour over cabbage mixture, and toss to coat. Refrigerate overnight for best flavor.
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I hope these help!