General Motors is to revamp its entire mid-size car line over the next three years, focusing on fewer, yet stronger nameplates. “GM is stepping up its efforts in this core segment, the largest in the industry, with a portfolio of ‘gotta-have’ vehicles that will cater to more diverse customer groups than ever before. New bodystyles, powertrains and performance packages created for each nameplate are being developed to increase volume and provide a greater range of options and pricing for the customer,” GM said in a statement.