Breadcrumb Home April 11, 2017 01:00 AM 2018 Buick Enclave Avenir The Buick Enclave is dropping nearly 400 pounds for 2018 while gaining cargo space and fuel economy. Tweet Share Share Email More Toggle Fullscreen Share Toggle Fullscreen Share Toggle Fullscreen Share Toggle Fullscreen Share Toggle Fullscreen Share Toggle Fullscreen Share Toggle Fullscreen Share The Enclave has a lower roofline, slightly longer wheelbase and less rounded appearance than the outgoing model.