Buick relies on transponder keys and smart key fobs, with push-to-start on newer Enclave, Encore, and LaCrosse models. Dealers and locksmiths can program keys on-site. Common issues include lost keys, dead fobs, and immobilizer problems.

U.S. Models & Years

 Enclave (2008–present); Encore (2013–present); Envision (2016–present); LaCrosse (1997–2019); Regal (1973–present; U.S. 1973–2004, 2011–2020); Verano (2011–2017); LeSabre (1959–2005); Riviera (1963–1999).