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2015 Chevy Silverado, GMC Sierra heavy duty trucks unveiled

Proving just how important trucks are in the Lone Star State, General Motors has chosen the State Fair of Texas to reveal its new heavy-duty trucks from Chevrolet and GMC. Looking to take some of the wind out of the sails of the 2014 Ram HD and 2015 Ford F-Series Super Duty, the 2015 Chevy Silverado HD and 2015 GMC Sierra HD will have plenty to brag about when they go on sale in the first quarter of next year.
The bragging starts right up front with two available engines. The standard engine is a Vortec 6.0-liter V8 that produces 360 horsepower in the 2500HD and 322 hp in the 3500HD to go along with 380 pound-feet of torque in all applications. The true benefit of this powerplant is that buyers can opt for it to run on straight gasoline, E85 FlexFuel or even compressed natural gas (CNG). For maximum towing and even more flexibility, the 6.6-liter Duramax turbodiesel B20-capable V8 is the way to go, with its carryover 397 hp and 765 lb-ft of torque. Though the max towing abilities of 23,200 pounds (with a fifth-wheel trailer) are less than the 30,000-pound rating of the new Ram, the GM HD trucks offer better conventional trailer towing (19,600 pounds) and payload (7,374 pounds) than rival heavy-duty trucks...for now. The Duramax is paired with a six-speed Allison automatic transmission, while the gas engine gets GM's six-speed Hydra-Matic - no manual transmissions are offered.
Including the engines, GM continues to offer a broad range of configurations (more than 150, to be exact) including three cabs, two cargo bed lengths, numerous trim levels and, of course, the choice of single- or dual-rear wheels on the 3500. The HD trucks have faces that are similar to their half-ton counterparts, with the exception of a larger grille and bigger for improved air flow, and like the current HD offerings, the new Silverado HD and Sierra HD DRW models feature a one-piece bed design incorporating the fender extensions.

Buick, GMC making OnStar Connected Services standard

The thing about the future is that so long as you're alive, you're going to get there whether you like it or not. Thanks to over-the-air connections essentially being a compulsory part of EV ownership and an increasingly important — and profitable — component of ICE ownership, it's easiest for automakers to install full-featured Internet connections in every vehicle. GM has taken the first step, a report in GM Authority saying that as of June 2, all Buick and GMC models are sold with the Onstar Connected Services plan good for three years. The OnStar site shows the Connected Vehicle tier that comes with a Wi-Fi hotspot costs $24.99 per month, which would be $900 minus a few pennies for three years. At the top end is OnStar Premium that runs about $1,800 for three years. Both include Connected Services features, yet GMA reports that depending on the vehicles, OnStar Connected Services will cost between $905 and $1,675. Only the GMC Hummer EV Edition 1 is excluded for now. GM confirmed the change to GM Authority, saying, "This offering provides our owners with a full suite of OnStar and Connected Services for three years, providing them with more time to enjoy services such as remote key fob, Wi-Fi data and OnStar safety services. By including this plan as standard equipment on the vehicle, it provides more customer value and a more seamless onboarding experience." Three trims of the GMC Sierra 1500 and two trims of the GMC Yukon and Yukon XL come in at the low end, OnStar adding $905 to their MSRPs. Almost every other vehicle gets hit with a $1,500 charge. The GMC Sierra HD Pro is the only model to charge $1,675 for it, which GMA breaks out as a "$1,500 3-year subscription and $175 OnStar & GMC Connected Services Capability." This brings up the question of the price differences; we can't tell if there's a difference in feature content between the price tiers, or why the Sierra HD gets the extra $175 fee. The automaker told GMA the upcharge will be folded into the MSRP. On the configurator for the Sierra 1500 SLE, for instance, the dialog box for three years of OnStar at $1,500 is automatically checked and can't be unchecked. The Buick configurators we tried don't mention OnStar.

Chevy Silverado, GMC Sierra 4.3-liter EcoTec3 V6 nets 18 mpg city, 24 highway

There is no doubting that fuel economy has become an important factor in the highly competitive fullsize truck market, with the Ford F-150 EcoBoost V6 and Pentastar V6-powered Ram 1500 setting quite a precedent in recent years. Now it's General Motors' turn. The General has just announced that the new base V6 used in the 2014 Chevrolet Silverado and GMC Sierra 1500 models will return an EPA-estimated 18 mpg city and 24 mpg highway in two-wheel drive trim, regardless of cab configuration.
While these figures don't go so far as to earn GM any "best-in-class" fuel economy claims (thanks to the 25-mpg Ram 1500 HFE), this new 4.3L EcoTec3 V6 does edge the F-150 and Toyota Tundra while boasting best-in-class numbers for torque, payload and towing capacity among six-cylinder rivals. This all-new engine produces 285 horsepower and 305 pound-feet of torque, and it gives the 2014 Silverado and Sierra the highest towing rating among standard V6 models with a 7,200-pound towing capacity - besting the Ram by 700 pounds, the base F-150 by 1,100 pounds and coming within 200 pounds of the V8-powered Nissan Titan. Scroll down for the official press releases from Chevrolet and GMC.