Test Drive: The 2018 Buick Enclave Avenir delivers

The Buick story is one of survival. While General Motors’ mid-level brands, Oldsmobile and Pontiac, were discontinued, Buick remains in the game, along with Chevrolet, Cadillac and GMC. Contributing to Buick’s enduring success is its lines of near-luxury crossover and sport-utility models — which now include the tiny Encore, compact Envision and midsize Enclave. Since …

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