Well just took my '08 Tahoe with the 5.3L into the Great Smoky Mountains this past week, it did awesome. We spent all day in the mountains. We drove from Gatlinburg TN to Cherokee N.C. and back and up to Clingmans Dome. Tahoe never missed a beat, and my mileage was great....17.9 mpg..not bad for doing alot of acceleration up those steep roads. Going to Tenn from Louisiana and return trip...I got 21.3 mpg and 21.5 mpg...So I'm happy with the new Tahoe as is the family, made for a great comfortable trip.
Scott in Louisiana
Scott in Louisiana