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Powertrains and Performance. The 2009 Chevrolet Avalanche is available with either two-wheel drive (2WD) or four-wheel drive (4WD). All 2WD models come standard with a 5.3-liter V8 putting out 310 horsepower and 335 pound-feet of torque, driven through a new six-speed automatic transmission. A larger 6.0-liter V8 delivering 366 hp and 376 lb-ft of torque is optional. A properly equipped 2WD Avalanche can tow up to 8,100 pounds. EPA-estimated fuel economy for 2009 is 14 mpg city/20 mpg highway and 16 mpg combined for 2WD versions with the 5.3-liter engine.
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The Chevrolet Avalanche's performance is good but not notable