(Heavy Duty) released a year later. A small refresh for 2003 models was introduced in 2002, bringing slight design changes and an upgrade to the audio and HVAC controls. The 2007.5 GMT800 trucks, built after the GMT900 had gone on sale, used the name Classic to denote the difference between the two generations. Second-generation Silverado / third-generation Sierra (GMT900; 2007) The all-new GMT900 generation of the Silverado/Sierra arrived in the last quarter of 2006 as a 2007 model. It features a redesigned exterior, interior, frame, and suspension as well as power increases on certain engines. Like the previous generation GMT800's and earlier C/K lines, it takes styling cues from the GMT900 SUVs of the same year, and also even from the 2004 Chevrolet Colorado/GMC Canyon. Like the GMT900 SUVs, these pickups also have greatly improved aerodynamics over their predecessors thanks to steeply raked windshields and tighter panel gaps which help improve fuel economy. The previous GMT800 models were continued through 2007 badged as "Classic", just as the GMT400 models continued for two years after the GMT800's introduction. The new Silverado 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 offers buyers a choice of two-door regular cabs, four-door extended cabs (with front-opening rear doors that now open 170 degrees similar to the Nissan Titan) and four-door crew cabs. GM also offers the trucks in the traditional two- and four-wheel-drive configurations. For the 2007 model year, the Sierra Denali shares the same billet grille from the other Denali models, and also has the same dash as the 2007 SUV's. The 2007 Sierra Denali was initially the only half-ton pickup that had a 6.2L V8 engine with and of torque coupled to a six-speed automatic transmission. This truck is also an optional all-wheel-drive vehicle and goes in 6.3 seconds. The Generation III small block V8 engines offered in the GMT800 trucks were replaced in the GMT900 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 and of torque) was introduced with the 2007 Cadillac Escalade and 2007 GMC Denali line, and was made available in the Silverado 1500 for MY 2009. After skipping the 2008 model