2018 Buick Enclave Avenir, Base, Essence, Premium 3.6L V6 - Gas. 2018 Buick Envision Base, Essence, Preferred, Premium 2.0L L4 - Gas, 2.5L L4 - Flex, 2.5L L4 - Gas. 2018 Buick LaCrosse Avenir, Base, Essence, Preferred, Premium 2.5L L4 - Electric/Gas, 3.6L V6 - Gas.
