BY TONY SWAN
From our perspective, and we're not alone on this issue, one man's GMC Sierra is another man's Chevy Silverado. Aside from superficial distinctions—badging and trim—these two pickup trucks have been accurately perceived as all-but-identical cousins for a long, long time. This perception was okay until GMC Truck began hungering for an identity of its own. That hunger became the wellspring of "professional-grade trucks," the divisional mantra that still has people saying, "What?" And it was also the wellspring of the Sierra C3.
Okay, the C3 (since rechristened the Sierra Denali) is composed of the same basic hardware as its Chevy Silverado counterpart. But the differences go a bit beyond mere smoke, mirrors, and stinking badges. For example, when you sign up for this premium model, you get a version of GM's 6.0-liter Vortec V-8 with more horsepower (325) and torque (370 pound-feet) than you can get in other Sierra half-tonners. Another example: You get a full-time all-wheel-drive system, as distinct from GM's Autotrac four-wheel drive, which lacks the C3's center differential. You also get an extended cab with rear demi-doors and ample room for five, plus a very nice menu of luxo goodies—OnStar, leather, premium audio, power everything.
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