The 2019 Buick LaCrosse add a new style statement with the new Sport Touring (ST) model. The ST brings a monotone theme to the LaCrosse with a body color grille surround and side vents, which are finished in chrome on other models. Additionally, the ST features a subtle rear spoiler, black mesh grille, 19-inch midnight silver wheels, and "ST" badging on the trunk lid.

The 2019 LaCrosse ST features a standard 310-horsepower, 3.6L V-6 and a 9-speed automatic transmission, with five exterior color options: White Frost Tricoat, Satin Steel Metallic, Quicksilver Metallic, Red Quartz Tintcoat and Ebony Twilight Metallic.

2019 also brings additional changes to other models in the LaCrosse lineup, including two new exterior colors, Carrageen Metallic and Pewter Metallic. A new air ionizer designed to eliminate odors and improve air quality is now standard on the Avenir model.

The combination of an electric motor with Buick's latest 2.5L four-cylinder engine delivers quiet, refined and spirited efficient performance backed by the value and customer experience expected of Buick. This eAssist system, when coupled with the four-cylinder engine, has a 19 percent increase in city fuel economy compared to the LaCrosse's advanced V-6 and leverages a compact lithium-ion battery pack to provide select benefits found in fully electric vehicles, such as torque-assisted launch, energy-saving regenerative braking and exceptionally smooth stop/start.

Compared to previous Buick eAssist executions, this newest iteration is more sophisticated, powerful and compact. With its increase in overall torque, drivers get the responsiveness expected from a full-size sedan. In addition, the newest eAssist system is discreetly packaged to maintain the LaCrosse's fold-down rear seat and ample trunk space.