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2010 Chevy Silverado XFE updated to achieve best-in-class 22 mpg highway

Justin Bimmer

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The XFE model's 5.3-liter V8 now has variable valve timing, optimized shift pattens in its 6-speed transmission, and new tweaks for its Active Fuel Management system that enables the truck to run on four cylinders at cruising speeds for longer.


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