General Motors Chevrolet brand is continuing its drive for younger customers. The automaker is adding a special midnight edition to its popular Trax subcompact crossover for the 2016 model year. The new package will add $500 to the $26,000 sticker price when it goes on sale late next month. The automaker will produce 1,000 of the new editions. The Trax was introduced a year ago and quickly became an important vehicle for Chevy, brining in more new, younger, and female buyers.