Virtually unchanged since its redesign in 2002, the 2008 GMC Envoy remains a mainstay in the diet of car buyers looking for spaciousness, power and handling. Available in SLE1, SLE2, SLT and a top-of-the-line Denali model, the Envoy is a four door, seven passenger SUV featuring a 285 horsepower 4.2-liter gas-powered inline 6-cylinder with a 4-speed overdrive-enabled automatic transmission. The Denali gets an additional power boost, featuring a 300 horsepower 5.3-liter gas-powered V8. The Envoy comes nicely equipped with power accessories and safety features.