The GMC Envoy was launched for 2002 as an upscale, "professional grade" iteration of the prolific General Motors GMT-360 midsize SUV platform that has spawned the Buick Rainier, Chevrolet TrailBlazer, Oldsmobile Bravada, and most recently, the Saab 9-7x. The Envoy's high feature content, strong powertrains, impressive on- and off-road ability, and varied work talents earned it praise and distinction. For 2005, the Envoy range is expanded with new Envoy Denali and Denali XL models. As with other GMC truck lines, Denali models tout upgraded interior trim and bigger standard engines. Most noteworthy of the Denali add-ons is the 5.3-liter/300-horse V-8. When it comes to fuel efficiency, Displacement on Demand, which deactivates certain cylinders while cruising, compensates for the V-8 XL's weight penalty. Other trim levels are equipped standard with a 4.2-liter inline six-cylinder engine making 275 horsepower. Both powerplants can drive the rear wheels, with part-time four-wheel-drive a desirable upgrade.... Read full article