The Buick LaCrosse is a mid-size entry-level luxury sedan produced by General Motors. It replaced the Buick Century and Regal in North America beginning in the 2005 model year. The LaCrosse made its debut in late 2004 as a 2005 model to replace the Century and Regal. Riding on a revised version of the W-body known as MS2000, the LaCrosse was initially available with two powerplant choices in three trim levels: a 3.8 L 3800 Series III V6 available in base CX and mid-level CXL forms, and a 3.6 L HFV6 V6 in the top line CXS model. Power is routed to the front wheels via a 4T65-E automatic transmission (4T65-E HD on Supers). The name was inspired by a Buick concept car of the same name shown in 2000 and also used as a reference to the sport of lacrosse, seen as popular with a younger, more active demographic to which Buick sought to market. It was originally sold as Buick Allure in Canada because 'la crosse' means 'self-love' (or 'swindle') in Quebec French slang.
Contributions by Bull-Doser, Atarivideomusic, and Jacob Poon.