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2014 Chevrolet Silverado and GMC Sierra debut all-new designs, three new engines

General Motors has finally dropped the curtain on the 2014 Chevrolet Silverado and 2014 GMC Sierra. Both trucks have undergone substantial revisions with updated versions of the company's 4.3-liter V6, 5.3-liter V8 and 6.2-liter V8 engines. In a shot across the bows of both Ford and Chrysler, GM says it won't use a V6 engine adapted from passenger car applications. Instead, it developed the 4.3-liter engine based on its proven truck-duty architecture.
All three mills will boast direct injection fuel systems as well as a new cylinder head design. Combined with a revised piston, the new engines feature a smaller combustion chamber with a compression ratio of 11:1 or higher depending on the application. Cylinder deactivation and continuously variable valve timing are all part of the recipe, and each engine is paired with a six-speed automatic transmission with auto grade breaking. So far, no fuel economy or horsepower figures have been released, though GM says the new engines will best their predecessors in both areas.
Outside, the trucks feature a number of enhancements to reduce drag and wind noise, and GM claims both the Silverado and Sierra will offer buyers some of the quietest cabins in the class. Extended cab models now feature front-hinged rear doors to allow easier access to the back passenger area, and Crew Cab buyers can now select between a five-foot, eight-inch bed or a six-foot, six-inch bed. Buyers with a mind toward going off road will also rejoice in the return of the Z71 package, complete with Rancho shocks, front tow hooks and additional under-body protection.

GMC Hummer EV heads north for winter

GMC announced early Tuesday that its new Hummer EV pickup is ready to head north for winter testing. What might seem like a trip in the wrong direction to us warm-blooded enthusiasts is a critical next step in the development of GM's new electric truck.  We also got a couple of teaser pics of the Hummer EV at GM's Milford Proving Grounds, along with two shots of development prototypes being assembled, of which GM says it has "a series." There's not much new to see here, but GM says there's more to come. "The GMC HUMMER EV has arrived at GM’s Milford Proving Grounds to continue validation tests and will head to northern Michigan to run through the teamÂ’s grueling winter testing process," GM said in its announcement. "We will document the journey and share updates in the coming weeks and months." The GMC HUMMER EV arrived at GM?s Milford Proving Grounds to c View 3 Photos The GMC Hummer EV Edition 1 will feature three electric motors, enabling torque vectoring. GMC says these motors produce 1,000 horsepower, though we don't yet have a final torque figure. Power comes from a 24-module Ultium battery pack which can provide an estimated 350 miles (or more) of range. GMC says this new architecture supports 800-volt fast charging up to 350 kW, which is comparable to the system Porsche introduced with its Taycan electric sedan, and GMC says it can replenish 100 miles of range in just 10 minutes. Planned variants include a two-motor setup, and an alternative three-motor version without torque vectoring. The Hummer EV rides on fully independent suspension with adaptive air shocks. They can provide continuous damping adjustments for comfort, and have a height adjustment range of 6 inches. When set in its max-height off-road mode, it has two additional inches of ground clearance, and the "Extract Mode" will lift it six inches higher than default. The Edition 1 model also comes with standard 35-inch mud terrain tires, and combined with the suspension, the Hummer EV has a fording depth of two feet and the capability to climb over an 18-inch vertical obstacle. Edition 1 Production begins late next year, with a starting price of $112,595. In fall 2022, we'll see the regular top trim starting at $99,995; In spring 2023, weÂ’ll get a mid-level trim that has three motors, air suspension and four-wheel steering -- but no torque vectoring -- starting at $89,995. 

GM follows U.S. trademark for AT4X with application in Mexico

Looks like GM is preparing to return the GMC Sierra 1500 All Terrain X to the marketplace, but with a new name. GM Authority found a trademark application filed in May this year in Mexico for the AT4X moniker. This comes three years after GM filed an application with the U.S. Patent and Trademark Office for the same alphanumeric in February 2016. When GMC introduced the all-new 2019 Sierra, it changed the previous All Terrain trim name to AT4, as seen on the Sierra AT4 we called "offroad overkill." The patent filings lend credence to the idea that the previous All Terrain X trim will soon be introduced by a Sierra 1500 AT4X model.  The erstwhile All Terrain X, introduced for the 2016 model year, took the former All Terrain further into the frame of serious-looking off-roader. On top of the Z71 suspension with a two-inch lift, Rancho monotube shocks, and a locking rear differential, the X added a sport bar for offroad lights, side steps, more dirt-friendly 18-inch wheels in 265/65 mud-terrains instead of 20-inchers on 275/65 all-terrains, a performance exhaust, and a lot more black and body-colored trim. At launch, we said it was "no Raptor threat," and even though GMC launched a 2500HD version in 2017 (pictured), it likely never worried the Ram Power Wagon. We wouldn't expect the equation to change with a possible AT4X, which is a shame, since hardcore OEM offroaders are becoming bro dozers for the mature, moneyed set.