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GM issues stop-delivery for 2015 Chevrolet Colorado and GMC Canyon

General Motors is issuing a stop-delivery order for its latest midsize pickups, the 2015 Chevrolet Colorado and GMC Canyon, because the driver's side airbag might not be wired correctly. The total number of vehicles affected is still being determined.
According to the statement from GM, the problem, "affects the vehicles' two-stage airbag system by reversing the deployment sequence and disrupting the deployment timing of the driver airbag stages." That means in an accident the bag may not work correctly.
Most of the affected trucks are still on the assembly line, in transit or unsold at dealers, says GM. Until a way to repair the problem is found, customer deliveries are stopped. However, "a small number" of them are in the possession of buyers. GM is contacting these people by phone and by FedEx letter to have the vehicles returned to dealers. In the meantime, they'll be given a loaner to drive.

Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.

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.