Combine 1 teaspoon white vinegar, 1/2 cup sour cream, 1 tablespoon minced fresh dill, 1 teaspoon sugar, 1/2 teaspoon salt, 1/4 teaspoon garlic powder.  Stir until combined.

Add 3 cups thinly sliced cucumbers and 1 cup red onion, sliced.

Stir to combine; cover and chill at least two hours.