GMC, the “Professional Grade” truck maker under the General Motors umbrella, isn’t finished adding luxe touches to its Heavy Duty series of Sierra pickup trucks. Just yesterday, GMC rolled out a brand-new Denali version of the HD pickem-up truck, but later this year at launch it will be available only as a crew-cab, four-wheel drive, single-rear wheel, three-quarter-ton model.

Before the end of the year, though, GMC will begin spreading the Denali love down its entire line-up of heavy haulers, and PickupTrucks.com is reporting that the dual-rear wheel dually chassis will be included. Naturally, a choice of either the 6.0-liter gasoline-powered V8 or the torque-tastic 6.6-liter Duramax diesel V8 will be the biggest choice at the time of purchase, followed by the buyers selection of either black, gray or white. Pricing has not yet been announced.

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