 Your source for the latest news all day, every day. Wake up with us and check back all day long. Kellogg News Talk 1320, 107.9. At Billion Buick GMC in Sioux Falls, we have one of the largest new GMC inventories in the Midwest. Whether you need a hard-working new GMC Sierra, half-ton or heavy-duty for work, or an SUV with room for the whole family, we have you covered. Stop by today.