2006 Used Automatic I am offering a 2006 GMC Superman, six-stud double, second owner for 15 years. Mileage is 302 as shown in the pictures. The car is like new. Body and engine are original and available for inspection. All glass has original seals. I just had it inspected and renewed. The car is used with care and has been kept in a garage. Contact via call due to infrequent access to the site.