The 5.3-liter V8 engine features GM's Active Fuel Management technology to save gas - you can't even feel it switching between four and eight cylinders whether on the highway or around town. The 5.3-liter V8 provides all the power most customers will need. , Autotrac four-wheel drive is on board, a full-time system that can be left engaged on dry pavement and includes low-range gearing. It comes in handy for rugged terrain and serious snow and ice, but it's also handy for yanking a boat up a slippery boat ramp or pulling a trailer out of a silty, sandy parking area, those momentary needs that can be so crucial.