The market for the largest of non-commercial pickup trucks may still be contracting, but it remains a necessary and profitable segment for American automakers that the imports have yet to infiltrate. You can bet that General Motors, Ford and Dodge will do their utmost to keep it that way, a point proven by this spy photo of the 2011 Chevy Silverado 3500 over at PickupTrucks.com. At first glance, it might be hard to notice the differences over the current HD behemoth, but closer inspection reveals that the entire front clip has been heavily revised.

The bumper has lost the huge chrome slabs that act as controversial visual bookends to the wide expanse under the grille of today's truck, which now houses rectangular fog lamps. A larger air inlet smack dab in the center of the new bumper funnels a cooling breeze to what appears to be a transmission oil cooler that may prove necessary given the huge loads that the Duramax diesel V8 will be able to haul with its rumored peak of over 700 lb-ft of torque.

[Source: PickupTrucks.com]