GM supplied the curb weight of this truck, which is 6522 pounds; combine that with the 397-horsepower, 765-pound-foot Duramax V-8, and the truck has a 16.4:1 weight-to-power ratio. Not bad for a three-quarter ton. Power delivery is quick and linear off the line, and the tires provide plenty of grip. This is a truck that's built for hard work -- 9900-pound GVW, 17,800-pound fifth-wheel towing capacity, 3378-pound payload -- yet if you don't regularly glance down at the speedometer, you will get a speeding ticket in this truck. Performance numbers show 0-to-60-mph time is 5.9 seconds and the quarter-mile time is 14.8 seconds at 91.3 mph. Diesel clatter is fairly quiet and the six-speed transmission's shifts are smooth. While you feel the torquey thrust of power when accelerating, there is a strange disconnect between what the truck should be doing (hard work) and what it actually is doing (hitting 60 mph in less than six seconds). The thought arises that even though trees are whizzing by, you can't possibly be going as fast as it seems. But you are.

Aside from the lack of interior amenities, including limited passenger and cargo room in the cabin, there is no compromise between the work aspect of this heavy-duty truck and the fun factor. And while we didn't have the chance to record fuel-economy data, this configuration has the potential to be among the best in this size category. You can buy this combination in both GMC and Chevrolet skins, but odds are most dealerships won't carry this exact truck. We took a look at how much it would cost to order one. Base price for the rear-drive longbed regular cab 2500HD is $28,960. Add the Duramax and Allison (the turbodiesel and transmission cost about an extra $8400 over the price of the base work truck), and MSRP is $37,680 without any other extras. (You can also get rear drive, regular cab, and Duramax/Allison in a 3500HD configuration.) That price is only marginally higher than what the half-ton Lightning and Silverado SS cost several years ago.

Best possible towing and payload capacity in the 2500 heavy-duty line, the least expensive way you can get a diesel, incredibly quick to 60 mph, potentially excellent fuel economy -- the street truck still lives, just in a different form than before.

2011 GMC Sierra 2500HD Work Truck
Base Price $28,960
Price as tested $37,680
Vehicle layout Front engine, RWD, 3-pass, 2-door pickup
Engine 6.6L/397-hp/765-lb-ft turbodiesel V-8, OHV, 4 valves/cyl
Transmission 6-speed automatic
Curb weight (dist f/r) 133.6 in
Wheelbase 225.0 x 80.0 x 77.5 in
Length x width x height 6522 lb
GVWR 9900 lb
Max payload capacity 3378 lb
Max towing capacity 17,800 lb
0-60 mph 5.9 sec
Quarter mile 14.8 sec @ 91.3 mph
EPA city/hwy fuel econ Not rated
On sale in U.S. Currently