General Motors released the Hummer H2 between 2003 and 2009 which signaled a complete transformation of military-grade H1 to focus on producing consumer SUVs. The Hummer H2 assembled at GM-leased plant under AM General production for General Motors produced two V8 engine versions: the 2003-2007 Vortec 6.0-liter V8 delivered 325 horsepower and 370 lb-ft of torque before an upgrade to 2008-2009's Vortec 6.2-liter V8 which produced 393 horsepower and 415 lb-ft torque. The engine system was joined with the tough 4-speed automatic transmission (4L65E) to offer versatile driving capabilities. The Hummer H2 achieved exceptional traction on rough surfaces when it used its permanent four-wheel-drive system. The Hummer H2's dimensions of 203.5 inches and 81.3 inches created a dominant road profile which merged perfectly with its sizable well-outfitted cabin. The optional power sunroof function served both as an open-air option and to enhance the outdoor features of the Hummer H2's rugged design. Safety instruments combined with utility features brought two major components such as reinforced bumpers integrated with impact force distribution and front and rear recovery hooks designed for off-road recovery. The manufacturer recommends using original Hummer H2 components to preserve both performance and lifetime because this practice supports the brand's goal to deliver durable and dependable engineering solutions.