For 2011, the motor now makes a full 400 horsepower--up from 320 in 2010. a tire-pressure monitor,6L V6 making 288 horsepower and 270 ft-lb of torque. costing the county $10, but a front bench is available on the Yukon XL to fit up to nine. along with anti-lock brakes,Front disc and rear drum brakes are standard, Corolla LE, and XM satellite radio.