2015 GMC Sierra HD

2015 GMC Sierra HD

There’s really no better setting to reveal a new pickup truck than Texas. Specifically, the Texas State Fair. And that’s just what GMC did with revealing the new, highly revised 2015 GMC Sierra 2500 and 3500 HD trucks — vehicles that we refer to as “brutes in suits”.

With these new power tools comes reworked sheetmetal that provides improved aerodynamics, while a slew of user-friendly features make work easier, and a quieter, more thought-out cabin with more technology and higher-quality materials gives us gains in overall refinement. But for you number buffs, here’s the important stuff:

The 2015 GMC Sierra 3500 HD delivers a best-in-class payload rating of 7,374 pounds – and the highest conventional tow rating of 19,600 pounds (with a factory-installed, frame-mounted box-tube hitch), while the maximum fifth-wheel rating comes at 23,200 pounds. These are all improvements over the outgoing ratings of 21,700 pounds from the fifth wheel, 17,000 pounds of hitch towing, and 6,635 pounds of max payload.

It’s important to note that the updated line of 2015 GMC HD trucks still utilize the GMT900 frame and not the K2xx frame that the 2014 Sierra 1500 introduced — much like how the frames of the outgoing models kept with the GMT800 frame until the 2011 model year. We await a chassis refresh of sorts in the coming years.

The 2015 GMC HD trucks also keep with the same 6.0L V8 and the proven 6.6L Duramax diesel and Allison Transmission powertrains. Though because this is the case, GMC can continue to offer a bi-fuel option that pairs the gas engine with a compressed natural gas system, just as with the outgoing HD model.

The 2015 Sierra HD models will be available with 6’6” and 8’ box lengths that are said to be stronger, more durable, easier to use and offer greater cargo flexibility with features like the integrated CornerStep rear bumper, a trickle-down from the all-new 2014 Sierra 1500. The Double Cab body style also replaces the less practical extended cab variant.

Also integrated into the new HD Sierra trucks is the new interior layout from the 2014 Sierra 1500, which means it’s more intuitive than before, with the GMC IntelliLink infotainment system front and center, and the row of toggle-switches that control features like Lane Departure Warning and Rear Park Assist.

The 2015 Sierra HD line will also offer the Z71 off-road suspension package on SLE and SLT models, which adds  35mm deflective disk twin-tube shock absorbers, off-road jounce bumpers, 33mm front stabilizer bar and a skid plate package. The Denali HD model also comes back, for those who desire glamour to go with their grit…