The Chevrolet Impala is a full-size family sedan that comes in three trim levels: the entry-level LS, the midgrade LT and the loaded LTZ. Antilock brakes, stability and traction control, front seat side airbags and side curtain airbags are standard on all Chevrolet Impala trims. With its front bench seat, the Impala can accommodate six passengers in a pinch.Under the hood, the "Chevrolet Impala"