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Watch GM's new pickup crash its way to five-star NHTSA ratings

General Motors has just scored a big win with its Chevrolet Silverado and GMC Sierra pickup trucks, acing the National Highway Traffic Safety Administration New Car Assessment Program. The two full-size trucks had already netted a five-star Overall Vehicle Score in their crew-cab variants, but the new testing certifies them as five-star trucks in both regular and double-cab bodystyles, so GM's trucks offer top ratings across the board.
"Our incredibly capable trucks have been engineered to be some of the safest," Gay Kent, GM's general director of Vehicle Safety and Crashworthiness said. "We've designed the vehicle structure, strategically placed high-strength steel and developed the occupant restraint system to achieve high levels of safety performance."
The scores mark the Silverado and Sierra as the first pickups to net five-star scores since NHTSA beefed up their testing regime in 2011, a nice feather in GM's cap as it continues to slug out the pickup truck wars with crosstown rivals Ford and Ram.

2017 GMC Acadia loses 700 pounds, gains everywhere else

Ladies and gentlemen, welcome to Acadia. The 2017 version of the three-row GMC crossover has all kinds of newness. The 2017 Acadia has lost 700 pounds compared to its predecessor thanks to high-strength steels allowing redesigned parts, and the fact that it overall, the vehicle is actually smaller. Length is reduced by 7.2 inches on a wheelbase diminished by 6.4 inches, it is 3.5 inches narrower and sits 3.9 inches lower. The 2016 Acadia was 4,656 pounds, the 2017 is 3,956 pounds. GMC says it will still swallow people, but not as many: the eight-passenger option didn't make the transition, potential three-row trims permitting five-, six-, and seven-passenger configurations. While you lose space, you gain convenience with a split-folding second row featuring tilt-and-slide for both sections. The third-row seats fold flat into the cargo floor, and if the second row is folded as well, cargo capacity improves over the 2016 Acadia, 79 cubic feet compared to 70 cu-ft. A new 2.5-liter four-cylinder brings a second engine option to the spec sheet, returning an estimated 22 city miles per gallon and 28 highway mpg with the help of stop/start tech on front-wheel-drive trims. The new 3.6-liter V6 gets around 310 horsepower, a power bump of about 19 hp, and an estimated 25 highway mpg in front-wheel-drive guise. Towing capacity for that V6 goes down, though, from 5,200 on the current Acadia to an estimated 4,000 pounds. The optional Tow Vision Trailering system will make that pulling easier. Both engines are hooked to a six-speed automatic. Now we can get to its looks. Trademarks like the square, flared wheel arches, dark D-pillars, and wraparound rear side windows made the transition, everything else is new. While weight has gone down, safety's gone way up with internal changes like the splayed chassis members to confront the small-offset test. New active safety upgrades run from from three kinds of automatic braking systems to surround vision cameras, automatic high beam control, a safety alert seat, and a following distance indicator. Buyers can choose from a front-wheel drive, all-wheel drive, or All Terrain model, each with its own electronic drive selector modes. The Normal, Sport, and Trailer/Tow modes are common to the trio. The FWD gets a Snow mode, the AWD adds adaptive 4x4 and Off Road modes; on the AWD, the 2x4 mode disconnects the rear axle from the drivetrain.

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!"