Meet Your 2009 Chevrolet Truck Lineup

[MM1281]

Originally Posted by jmlee0695

15/city 20 hwy 1 mpg hwy

The 4 speed truck in 2wd are alread rated at 15/20 with the 5.3. I was hoping for some slight improvement but I guess not

[Michael_S]

Originally Posted by MM1281

The 4 speed truck in 2wd are alread rated at 15/20 with the 5.3. I was hoping for some slight improvement but I guess not

I would guess that the 6 speeds have a significant advantage in acceleration, and a small advantage in fuel economy but not enough to raise the EPA rating 1 mpg.