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The Chevrolet Avalanche was launched in 2001 and came with 2 engine choices: the Vortec 5.3L V8 engine and the Vortec 8.1L V8 engine. Although fuel economy is not its strong suit, the Avalanche was an immediate success. Though never as popular as its sisters the Tahoe and the Yukon, the Avalanche has developed a loyal following all its own.