In a small bowl, combine garlic and oil; brush over corn. Sprinkle with sugar. Place each on a double thickness of heavy-duty foil (about 14 in. x 12 in.). Fold foil over corn and seal tightly.
Grill corn, covered, over medium heat for 10-15 minutes or until tender, turning occasionally. Open foil carefully to allow steam to escape.
We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices.