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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.

2016 GMC Canyon Diesel Quick Spin [w/video]

The 2016 GMC Canyon Diesel and the 2016 Chevrolet Colorado Diesel are basically the same truck. This isn't really news – the two midsize pickups have been discussed side by side since their inception. If you stop reading right now, go to our First Drive story from last week, and replace "Colorado" with "Canyon," you won't miss a beat. Samesies. Looks-wise, the Canyon is a bit more polished overall than the Colorado on which its based. The front fascia has a more upscale, yet tough aura, the squared-off headlamps mimic those of the Sierra, and the alloy wheels – especially those on this SLT tester – are a premium touch. Inside the cabin, it's all carryover stuff from the Chevy truck, just with different badges and some unique color/trim combos. So it's a Colorado Diesel with a Canyon treatment. It's the typical GMC updo. But that's fine by me; this thing's a real sweetheart. Driving Notes Talk about smooth operator. This is one of the least harsh diesel engines I've ever tested, with low levels of vibration. Credit for that goes to the fancy German torque converter, as our own David Gluckman detailed in the Colorado First Drive. There's there's also very little in the way of turbo lag in this truck, aiding the silky character. I kind of miss the "turbo moment" woosh of power, but I'll happily trade that for total overall refinement. GMC hasn't released official fuel economy figures just yet, and my drive route wasn't exactly great for testing the ol' miles per gallon rating. I spent about 45 minutes slogging through traffic in Manhattan (perfect place for a diesel pickup, right?), before getting out onto the highway for another 45 or so. The combined trip returned numbers in the mid-20s, but I have to believe this truck can do better. The steering is vague, the body rolls – it drives like a pickup. That said, even though it's on the larger side of midsize, the Canyon is easy to maneuver, sight lines are great, and it's a generally pleasant-handling truck. The 2.8-liter Duramax diesel engine adds about 200 pounds to the Canyon's overall curb weight, but you don't notice from behind the wheel. Braking feel is smooth and solid, and the truck doesn't feel especially nose-heavy. Despite the anti-aero shape, the Canyon delivers a quiet ride with very little wind or road noise. Credit this to all the sound deadening material added to keep unpleasant diesel chugga-chugga-chugga noises out of the cabin.

GM readying aluminum-body fullsize pickups

Ford's extensive use of aluminum in its 2015 F-150 is a big deal. A really big deal. Big enough, in fact, that General Motors is reportedly changing its fullsize pickup strategy. According to The Wall Street Journal, The General has locked in partnerships with Alcoa Inc. and Novelis Inc. - companies that will supply aluminum for the next-generation Chevrolet Silverado and GMC Sierra trucks.
"Ford's introduction of the 2015 F-150 pickup truck was a game changer, and it's the first, not the last, conversion of this type," Novelis spokesperson Charles Belbin told the Journal. The switch to aluminum has allowed Ford to shave roughly 700 pounds off its fullsize truck's curb weight. And while official mileage ratings have not been announced, the weight loss should go a long way for improving efficiency, especially when combined other efficiency-minded improvements including better aerodynamics and new, turbocharged V6 engines.
Of course, aluminum-bodied cars are nothing new. But extensive use of aluminum in a major, best-selling product like the Ford F-150 is expected to kick off widespread use of this weight-saving material as availability rises and cost decreases. The WSJ reports that GM had originally explored the idea of moving to aluminum pickups back in 2008, but abandoned the idea due to cost concerns amid economic woes.