Buick marks its 100th year with a Celebration Edition package for its 2003 LeSabre. LeSabre is America's best-selling full-size car and comes in Custom and Limited models, with the Celebration Edition a Limited-model option package. All use a 3.8-liter V6 and automatic transmission. Antilock 4-wheel-disc brakes are standard. Front side airbags are standard on Limited and optional on Custom. Traction control and General Motors' OnStar assistance system are standard on Limited, optional on Custom. GM's Stabilitrak antiskid system is available on Limited. The optional Gran Touring Package includes firmer suspension and 16-inch wheels vs. 15s. The standard front bench seat allows 6-passenger seating; bucket seats are optional. Leather upholstery is standard on Limited, optional on Custom. Power memory front seats are optional on Limited. Buick will build 10,000 Celebration Editions, distinguished by body-color exterior trim, chrome alloy wheels, 2-tone leather seating with embroidered logos, Black Cherry woodgrain interior trim, and turn-signal indicators in the side mirrors. XM satellite radio is a new option available on the Limited.