2006 Duramax means the 6spd tiptronic shifter and even longer brake life. This one won't last long as Durmax Diesels are about as hard to come by as an honest politician. Karavan Camper Shell Bed Extend Slide Out EZ Storage. Lifted with Wheels and Tires SLT trim package with Leather Moonroof Bose CD changer sound system Onstar Heated/Memory Seats and SOOOOO MUCH MORE!!