Compared with the Chevrolet Silverado, GMC's styling is more conservative, more mature, with smoother, more sophisticated lines. Overall, it's a look that a lot of truck buyers like: more upscale than the Chevrolet pickup, more conservative than the Dodge or Ford pickups.

Like the Denali versions of the Yukon and Envoy, Sierra Denali features a distinctive front-end appearance. Its chromed mesh grille looks like something from a hot-rod shop. Projector-beam headlamps and unique front fascia and fog lamps add up-market distinction, along with body color on the door handles, side moldings, tailgate handle, outside mirrors, rear bumper and tonneau cover. Chrome running boards with integral mud guards further distinguish the Denali from other Sierras.

For 2005, nearly all Sierras come with 17-inch wheels: painted steel on work trucks, chromed steel on base and SLE, aluminum on SLT and polished aluminum on Denali. The only exceptions are the 1500HD and the Hybrid, which make do with 16-inch rims. Denali models are available with 20-inch wheels for a stronger styling statement.

The load height (the distance from the ground to the bed) for 2WD Sierra models is just 31.6 inches. For 4WD models, it's 33.7 inches. Those numbers start to look a lot more important when you have to lift something heavy into the pickup bed.

All GMC Sierras are built on the stiffest and lightest truck frame General Motors has ever produced. The frame rails are hydroformed, a process that uses high-pressure hydraulics to shape relatively large steel components. Tubular crossmembers and roll-formed mid-rails increase rigidity further. This stiff structure enhances handling and ride quality immensely, while improving crashworthiness.