How much is a 1978 GMC?

Based on the current 1978 GMC listings for sale on Classics on Autotrader, you may find some that cost as low as $6,795 and max out around $30,995. While the average price of a 1978 GMC is around $17,797, take a look at all the features, the vehicle's condition, and mileage to find the best deal.