 at 10 a.m. on KELO 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. We'll help you find the right vehicle for you. Don't see exactly what you want? We'll order it. Shop the GMC Giant today. Billion Buick GMC in Sioux Falls.