GMC and the TV show CSI debut an all-new steel gray metallic GMC Yukon XL Denali outfitted as a new Mobile Analysis Unit this week. The season finale of CSI (the original Las Vegas version) airing May 19, is directed by reservoir dog Quentin Taratino. CBS and GMC are also giving visitors a chance to win a new 2005 GMC Yukon XL Denali. The network's website also includes exclusive interviews and behind-the-scenes video for CSI fans.

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