How much is a GMC Sierra 3500?

Based on the current GMC Sierra 3500 listings for sale on Classics on Autotrader, you may find some that cost as low as $5,500 and max out around $139,500. While the average price of a GMC Sierra 3500 is around $32,419, take a look at all the features, the vehicle's condition, and mileage to find the best deal.