Pictured here and standard on Work Truck, SLE1, SLE2, and SLT Sierras is what GM calls the “pure American pickup dash panel.” That’s to say, a design deemed to be “functional, intuitive, contemporary, with low-glass materials and tight gaps.” Gone is the previous setup with its myriad of buttons amid a sea of shiny plastics, replaced by a straight-forward interpretation featuring clear gauges, basic controls placed within easy reach, and a more visually-pleasing style. Visitors to the 2007 GMC Sierra’s cabin will also notice large, sturdy door handles, increased interior room, a double glovebox, and when under way, a ride that GM claims is markedly quieter than its predecessor. Extended Cab versions feature side access doors that open a full 170 degrees, power rear windows, and a rear split bench seat that folds up, availing a relatively flat floor absent obstructing lower seat frames. SLE1 models also include a 40/20/40 split front bench seat with ample storage – 6.1 liters in the fold-down center armrest and 9.1 liters under the flip-up center seat.

Basic is the best way to describe the Sierra Work Truck, since it comes equipped with vinyl upholstery, an am/fm radio, and little else aside from OnStar and air conditioning. Of course, you can go nuts and outfit the truck with cloth on the seats and floor, a CD player, and an Eaton automatic locking rear differential that kicks in as soon as there’s a 25-rpm discrepancy between tire speed. Also available is a rail system for the bed, bolting to the sides and forward wall of the box, featuring upper and lower tracks with four tie-downs capable of securing up to 500 pounds each. Protecting the bed is the job of an optional bed liner or bed mat; spray-in liners are not currently a factory option.

SLE1 models add a standard cloth interior, the usual array of power features including keyless entry, chrome accents, and StabiliTrak stability control on Crew Cab versions. The Sierra SLE2 goes one further with bucket seats, automatic climate control, power front seats, and more, with options like leather seating, side-curtain airbags, XM satellite radio, a navigation system, and a power sunroof. One rung from the top resides the Sierra SLT, featuring a unique instrument panel borrowed from the Yukon and the rest of GM’s full-size SUVs, Bose sound, and other premium items. And then there’s the luxurious Sierra Denali, marked by standard 18-inch alloy or optional 20-inch chrome wheels, a six-disc CD changer and MP3 player, wood trim, unique graphics, power-adjustable pedals, dual-zone climate control, a rear park assist system, and GM’s EZ Lift tailgate assist.