http://VacavilleGMC.com 866-593-1568 The 2012 GMC Yukon SLE and SLT are powered by a 5.3-liter V8 good for 320 horsepower and 335 pound-feet of torque. A six-speed automatic transmission with rear-wheel drive is standard. There are two four-wheel-drive systems available: a single-speed transfer case and a more traditional two-speed case with low-range gearing for low-traction situations. The 2012 GMC Yukon's Tahoe sibling with four-wheel drive went from zero to 60 mph in 8.5 seconds. Estimated fuel economy is 15 mpg city/21 mpg highway and 17 mpg combined with rear- or four-wheel drive. Depending on drivetrain and equipment, the 2012 GMC Yukon can tow as much as 8,400 pounds.