The new Silverado/SIERRA earned the North American Truck of the Year award for 2007 and was Motor Trend magazine's Truck of the Year for 2007. , , Like its predecessors, the new Silverado/ SIERRA offers buyers a choice of two door regular cabs, four door extended cabs (with rear doors that now open 170 degrees similar to the Nissan Titan) and four door crew cabs with the rear doors opening in the same direction as the front doors. GM also offers the trucks in the traditional two and four wheel drive configurations., The Generation III small block V8 engines offered in the GMT 800 trucks will be replaced in the GMT 900 series by the Generation IV small block V8 engine family, featuring upgrades such as increased power and Active Fuel Management on the 5.3 L and 6.0 L V8s. A new high performance 6.2 liter V8 (with 403 hp and 417 lb·ft of torque) was introduced with the 2007 Cadillac Escalade and 2007 GMC Denali line, and is now available on the Silverado LTZ trim line.