HD truck sales numbers (2500/3500)

GM needs to release their 45-5500 pickups. I am told they will release when the updated Duramax comes on line in 2017. While GM is increasing their marketshare in the HD market, they need the heavier trucks to anchor their HD lineup. While they don't need the more powerful Duramax to handle the Ford or Ram on the street (we will see if that continues with the 900 ft Ram), they need it to win the war on the advertising front.