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Leak reveals GM's 2017 heavy duty diesel trucks to get 910 lb-ft of torque [UPDATE]

UPDATE: Chevrolet officially announced specs for the 2017 Silverado HD and the rumors were true. The truck's new Duramax 6.6-liter turbo-diesel V8 puts out 445 horsepower and 910 pound-feet of torque. Chevrolet says the new motor produces 19 percent more torque and 12 percent more horsepower, while producing 35 percent fewer emissions. Overall, the new engine is a big improvement over the current motor, which generates 397 horsepower and 765 pound-feet of torque. According to Truck Trend, GM's newest heavy duty pickup trucks will pick up quite a bit more power and torque. The publication spotted a recent GM Powertrain ordering catalog that had the engine specs for the 2017 model year and managed to get some screenshots before the catalog was taken down, and they can be viewed here. The screenshots revealed that the 6.6-liter turbodiesel V8 powering the Silverado and Sierra heavy duty models will boast 445 horsepower and 910 lb-ft of torque. This is a substantial gain over the current models' 397 horsepower and 765 lb-ft of torque, and as Truck Trend points out, it exceeds the Ford Super Duty line's horsepower output of 440, but comes short of the 925 lb-ft rating. Truck Trend credits part of this output gain to the new intake system GM will introduce on the 2017 heavy duties. The intake gets 60 percent of its air from a scoop on the hood, with the other 40 percent coming from behind one of the front fenders. GM doesn't reveal horsepower figures in the press release about the scoop, but it does say the cooler air helps with maintaining the engine's output, and that the scoop does produce a ram-air affect, providing more air at speed. As we know, more air plus more fuel equals more power, but there's likely more to the power increase in this engine than only the intake. Related Video: News Source: Truck Trend via MSN Chevrolet GM GMC Truck Diesel Vehicles

Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"

Truck Trend names GMC Sierra Denali 2016 PTOTY

Citing its best-in-class power, its amenities, and technology, Truck Trend magazine has named the GMC Sierra Denali its 2016 Pickup Truck of the Year. Seven "all-new or significantly revised pickup trucks" were invited to compete, and out of the seven tested categories the Sierra won interior, functionality, and "Empirical," and scored second in highway testing and exterior looks. It beat the Chevrolet Silverado 1500 High Country and Colorado Z71 diesel, GMC Canyon SLT diesel, Nissan Titan XD Pro4X, Ram 1500 Rebel, and Toyota Tacoma TRD Off-Road. In the mag's 43rd annual Four-Wheeler of the Year award, the Range Rover SVR claimed the crown. The Sierra got refreshed this year with new front-end styling with HID headlamps and LED accents, tech features like Apple CarPlay, Android Auto, and wireless phone charging, and optional convenience features like a remote locking tailgate and power articulated assist steps. The big powertrain upgrade was availability of the 5.3- and 6.2-liter V8s with an eight-speed automatic transmission. This is the second time Truck Trend has conferred a PTOTY award, the Ford F-150 walking away with the silverware last year. The nod to the Sierra comes after sister publication Motor Trend named the 2016 Chevy Colorado with the Duramax diesel engine its Truck of the Year. The press release below has the details on how the accolade was won. GMC Sierra 1500 Denali Wins TRUCK TREND'S 2016 Pickup Truck of the Year AwardFirst-Class Amenities, 21st Century Technology, and Best-in-Class Power Lead GMC Sierra 1500 Denali to Best Field of SevenLOS ANGELES December 22, 2015—TRUCK TREND, the nation's premier light-truck authority, has selected the GMC Sierra 1500 Denali as the winner of its second annual Pickup Truck of the Year Award.TRUCK TREND's Pickup Truck of the Year award program is an invitation-only shootout that is only open to all-new or significantly revised pickup trucks for the upcoming model year. For 2016, the field of vehicles included seven entries from five companies and consisted of one variant from each company's eligible product line. This year's contenders included:- Chevrolet Silverado 1500 High Country- Chevrolet Colorado Z71- GMC Canyon SLT- GMC Sierra 1500 Denali- Nissan Titan XD Pro4X- Ram 1500 Rebel- Toyota Tacoma TRD Off-RoadTRUCK TREND's experts were immediately impressed with the Sierra Denali, which is focused on comfort, safety, and innovation.