The Chevy Tahoe and Suburban -- as well as the similar GMC Yukon -- are extremely important to General Motors (NYSE:GM). The company dominates this highly profitable full-size SUV space with a 74% market share. Ford (NYSE:F), with its Expedition and Lincoln Navigator twin, is a distant second place behind the GM fleet -- though it's widely expected to offer redesigned 2015 models as well. Meanwhile, Nissan (Armada), Toyota (Sequoia), and others fight for the leftovers.

Thus, GM's unveiling of the redesigned Tahoe and Suburban last week in New York was officially a Big Deal. Our roving reporter Rex Moore was at the event and, along with senior auto analyst John Rosevear, was generally impressed with the new vehicles.

In this installment of a multi-part video series, Rex goes straight to the designers and engineers for details on the refreshed SUVs. Today, he speaks with chief engineer Tim Asoklis about the new, lighter materials for the Tahoe, and whether that affects the vehicle's durability.

Rex Moore has no position in any stocks mentioned. The Motley Fool recommends Ford and General Motors. The Motley Fool owns shares of Ford. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.