The Sierra Hybrid is all about the mileage (scoring 20 city and 20 highway on the 4WD version). But maybe the most impressive aspect about this full-size pick-up truck is what’s not missing. And what hasn’t been forsaken is truck-might. Sierra Hybrid provides all the good truck-stuff: towing (5,900 pounds for 4WD), locking rear differential, coil-over-shock front suspension and multi-leaf rear suspension. This truck is a smooth handler, thanks to Z85 suspension tuning and a hydraulic mount that helps mellow out the rough roads. The four-door Sierra Hybrid is a great compliment to the non-hybrid Sierra pick-up trucks—the Sierra 1500 (mating a new 6-speed automatic transmission to the V8 engine in the 2009 model year) and the Sierra 2500HD and 3500HD. GM’s patented two-mode hybrid system—first seen in the 2008 GMC Yukon Hybrid—is a hearty performer in large vehicles like the 5,882-pound (curb weight) body-on-frame Sierra Hybrid. The hybrid package includes electric motors and a 300-volt nickel-metal hydride Energy Storage System. (The battery pack is stowed beneath the rear seat.). All-electric driving-mode occurs up to 30 mph. A Vortec 6.0-liter V8 engine with Active Fuel Management and late intake valve closing technology adds to the fuel-saving equation. Sierra Hybrid gets an estimated 40 percent city fuel economy and a 25 percent improvement in overall fuel economy when compared to the non-hybrid Sierra 1500. MSRP of the Sierra Hybrid is $47,675.