The 2008 GMC Envoy gains standard curtain side airbags and trims down its model lineup. This five-passenger midsize SUV is a traditional truck-type design that is shared with the Chevrolet TrailBlazer, Isuzu Ascender, and Saab 9-7X. SLE, SLT, and uplevel Envoy Denali trim levels return. Base versions use a 285-hp 4.2-liter inline 6-cylinder engine. Denalis have a 300-hp 5.3-liter V8 with GM's Active Fuel Management cylinder deactivation. Maximum towing capacity is 6600 lb. All Envoys have a 4-speed automatic transmission and are available with rear-wheel drive or 4-wheel drive that can be left engaged on dry pavement and includes a low-range gear for off-roading. Available safety features include ABS, traction control, antiskid system, and curtain side airbags. Options include power-adjustable pedals, DVD entertainment, and navigation system. Denalis stand apart with a chrome grille and other styling touches inside and out, plus load-leveling suspension and extra sound insulation.