I traded in my 2004 Avalanche for 2007 LT3. I pulled my 6500lb travel trailer without any problems and had plenty of power. With my '04 it seemed like it was always between gears. Not the case with '07. The gas mileage has also been much better (19.3). You feel no difference when the active fuel management kicks in. I am very happy with my purchase.
Heated leather seats, remote starter, automatic locking tailgate, and the active fuel management.
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