12 Sierra 3500hd Sle Leather 6.6 Duramax 6spd Allison 4x4 Camera 1owner Carfax on 2040-cars

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2015 Sierra All Terrain HD looks ready to hit heavy-duty trails

GMC is getting its heavy-duty trucks ready for the mud this summer with its All Terrain package for the Sierra 2500HD and 3500HD. Meant to blend style, tech and ruggedness, the pack includes a lot of extra chrome outside and an off-road package underneath.
The 2015 Sierra All Terrain HD trucks naturally come standard with four-wheel drive with an electronically controlled transfer case to handle things in the dirt. The Z71 off-road package is also standard, which includes Rancho twin-tube shocks, hill descent control and a skid plate. To add some style when off the beaten path, the pack includes chrome trim on the mirror caps, lower bumper and grille surround, plus LEDs around the headlights and 18-inch wheels (20-inchers are optional on the 2500HD). The 3500HD also gets chrome, adjustable outside camper mirrors. The interior receives a technology upgrade thanks to the standard rearview camera and IntelliLink infotainment that can act as a Wi-Fi hotspot through OnStar 4G LTE, read text messages and includes Siri Eyes Free for iPhone users.
The All Terrain package goes on sale on both trucks this summer and is offered on either the SLE or SLT trim levels in double cab and crew cab models. The standard engine is the 6.0-liter V8 with 360 horsepower and 380 pound-feet of torque, but the Duramax 6.6-liter, diesel V8 with 397 hp and 765 lb-ft is also available. The gas engine is mated to a Hydra-matic six-speed automatic, and the diesel uses an Allison six-speed automatic. Scroll down to read the full announcement about these heavy-duty off-roaders.

2022 GMC Sierra 1500 AT4 Driveway Test | How to use the GMC MultiPro Tailgate

The GMC MultiPro Tailgate is a six-way tailgate that was introduced on the current-generation GMC Sierra 1500 back in 2018. Three years later, not a whole lot has changed, and while the tailgate offers quite a bit more utility than a normal tailgate, the frustrations we had when first testing it are still there. There’s a specific order the tailgate has to be opened for certain uses to work, and it can be a bit awkward to use at times when trying to close multiple steps and tailgates on a variety of different hinges. Is it useful utility, a marketing gimmick to sell more trucks or a mixture of both? Take a look at the video above and let us know what you think in the comments below. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

2020 GMC Sierra HD caught in double-cab, low-trim gas-engine guise

Naturally when the 2020 GMC Sierra HD was revealed, GMC picked the flashiest, most-impressive Denali model with the big crew cab configuration and diesel engine. But obviously not all will be equipped that way, so it's exciting to see a lower trim model like the truck above. This 2020 GMC Sierra HD is a more modest SLT trim model equipped with the gas V8 and lacking the MultiPro tailgate. Styling doesn't take a hit with the shorter shape, and arguably, it looks more athletic without so much metal between the wheels. The length is the only real difference, with the rest of the sheetmetal just as chisled on the bigger version. Interestingly, this gas-powered Sierra HD still has a big hood scoop from its diesel sibling. On the current GM heavy duty trucks, only the diesel models get a scoop, and it's specifically for getting more cool air to the intake. The Silverado HD may continue this differentiation, but GMC is clearly keeping it for all models. When the Sierra HD goes on sale this summer, it will be available with either a 6.2-liter gasoline V8 like in this truck, or a 6.6-liter turbodiesel V8 making 445 horsepower and 910 pound-feet of torque, the same as the current model. All models get bedside steps, and the MultiPro tailgate is available either as standard or an option with all trims. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.