Chevrolet has introduced a new 1LT luxury Impala for the year 2008, loaded with features. The car cruises well on the highway. Chevy Impala is offered in four models: LS, LT, LTZ and SS. The LT has two different trim levels: 1LT and 2LT. The Impala rides on 16-18-inch, five-spoke, styled cast-aluminum wheels. It has a simplified sound system, while the new radio is intuitive and offers excellent reception.