GMC Envoy shares its chassis and engine with the Chevrolet TrailBlazer, Buick Rainier, and Oldsmobile Bravada. Each boasts unique styling, however. Envoy has conservative, upmarket styling. The GMC offers more features than the Chevy. GMC Envoy is responsive and stable. The six-cylinder Vortex 4200 engine is exceptional and a perfect companion for the Envoy. It incorporates state-of-the-art engine construction and management, and gets 16/22 mpg city/highway mileage with 2WD. From 4.2 liters, the inline-6 produces a dazzling 275 horsepower, 36 more than Ford Explorer's new 4.6-liter sohc V8. Envoy's engine boasts a broad torque curve peaking at 275 pounds-feet, only 7 less than the Ford and arriving 400 rpm sooner. About 90 percent of the peak torque is available at just 1600 rpm and it's still there at 5600 rpm. That means quick response at any engine speed, allowing the Envoy to bound past trucks on steep uphill two-lanes with confidence. This vehicle is exceptionally clean inside and out and will give you reliable and functional transportation without breaking the bank.