The GMC Sierra SLT boasts interior features popularized by the Yukon sport utility, providing a much more upscale environment for the driver and passengers. GMC hasn't forgotten about owners who use their trucks for work, however. So other Sierra models use a pure pickup interior with more function, like dual glove boxes, and less luxury.

The "pure pickup," as it's called, has a unique dashboard that is more driver-oriented and has larger switchgear and door handles that are designed to be easily manipulated by those wearing work gloves. The pure pickup interior includes a 40/20/40 split front bench seat with the center section folding down to provide a large storage compartment and wide armrest.

The SUV-style luxury-oriented interior puts audio and ventilation system controls more easily within reach of the front-seat passenger and has two front bucket seats with a fixed center console with assorted storage compartments.

Either dashboard sports full analog instrumentation, and many have more info available through digital display. Operating controls are GM simple, especially on the pure pickup, while the top-line models central dash has many small white-on-black buttons that may require a short learning curve. Some drivers report peculiar ergonomic details as the steering wheel is slightly offset from the seat centerline.

Rear seating is provided for three people in the extended and crew cab versions, with 34.3 inches of rear legroom in the extended cab and 38.7 in the crew cab, space is similar to Ford's F-150 and Nissan's Titan, and smaller than Dodge's Quad and Mega Cabs and Tundra's Double and CrewMax cabs. The crew cab rear seat is split 60/40 and can folded up individually for a flat load floor; this arrangement is optional on extended cabs.

Access to the rear seating area of the extended cab is eased by rear-hinged doors that open to nearly flush with the bed sides. Sitting in the back seat of the extended cab is made more pleasant thanks to the fact that the windows in the rear access doors power fully down.