This Impala-based model was freshened for 2006. The 5.3-liter V8 has a lot of power but spins the front tires easily during acceleration, producing disconcerting torque steer. This engine shuts off fuel to four cylinders when power demand is low, but still returned only 17 mpg overall. The base engine is a coarse 3.5-liter V6. The SS model has a stiff and busy ride. Handling is cumbersome; the steering feels heavy and offers little feedback. Wide roof pillars and a high dashboard restrict overall visibility. Interior quality is unimpressive. Options such as satellite radio and remote starting are worthwhile. The 2007 run will be its swan song.