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The 2015 Chevrolet Silverado 2500HD and 3500HD are engineered to be stronger and smarter, delivering the capability heavy-duty truck customers demand, along with greater refine- ment and control for more comfort and confidence on the job and on the road. The 2015 Silverado HDs are the heavy lifters in Chevrolet's three-truck strategy, which includes the new 2014 Silverado 1500 and, later this year, the 2015 Colorado midsize truck. The new Silverado HDs offer more than 150 combinations of cabs, bed lengths, powertrains, drivetrains and axle ratios, enabling customers to buy exactly the right truck for their towing and hauling needs. Silverado 2500HD and 3500HD models are available in Work Truck (WT), LT and LTZ trims, and offered in regular cab, double cab and crew cab configurations (regular cab available only in WT and LT trims). The new double cab model replaces the previous extended cab and features forward-hinged rear doors, which allow easier access in tight parking spaces. The trucks are available with all-new, stronger 6'6"and 8' cargo boxes with standard CornerStep bumpers, EZ Lift-and-Lower tailgates, and other features that make cargo handling easier. The 2015 Silverado HD will be available with safety features such as Forward Collision Alert, Lane Departure Warning with an Active Safety Seat, and Front and Rear Park Assist. Head-curtain and seat-mounted side airbags are standard on 2500 and available on 3500 models. The cabs feature inlaid doors, which fit snugly into recesses in the body sides for reduced turbulence and wind rush. Combined with new triple door seals, the doors help create a quieter inte- rior. The smallest details of the body, such as the roof and tailgate spoiler, were tuned in a wind tunnel to smooth airflow over the truck for reduced noise and improved aerodynamic efficiency. The new truck cab is stronger, as well, with nearly two-thirds of the cab structure made from high-strength steel for a confident feel and improved safety. The rear doors on crew-cab models are larger, and combined with revised seats, create approxi- mately two inches more rear legroom and enable easier entry and exit for back seat passengers. Inside, the 2015 Silverado HDs receive the same updates as the 2014 Silverado 1500, including an upright instrument panel that puts important controls within easy reach, a six-gauge instrument cluster with driver informa- tion center, and multiple storage options tailored specifi- cally to the needs of truck customers. The new Chevrolet MyLink, standard on LT and LTZ models, provides easy-to-use connectivity for the job site, with Natural Language Voice Recognition and enough ports and power outlets to support multiple devices. And through OnStar's new 4G LTE network (available September 2014), the Silverado HD trucks will be available with WiFi hot spot connectivity, which makes it easier to get work done at remote job sites. The foundation of the 2015 Silverado HD lineup is a family of fully boxed frames, which use large cross sections, hydroforming and high-strength steels in key areas. The stiffness of the frames contributes to improved handling and ride comfort, while the strength of the frames enhances payload and towing capability. The Silverado HDs employ an independent front suspension specifically engineered for HD pickup use. Torsion bars tailored to the weight ratings of the trucks, allow easier trim height adjust- ment to account for the weight of snowplows or other accessories. In the rear, asymmetrical leaf springs balance ride and load carry- ing, and improve control of axle hop. The sturdy chassis and heavy-duty suspensions contribute to greater payload and towing capabilities, compared to previous models: * Maximum available payload is 7,374 pounds, up from 7,222 pounds. * Maximum available conventional towing is 19,600 pounds with the available factory hitch – up from 18,000 pounds. * Maximum available fifth-wheel towing is 23,200 pounds, up from 22,500 pounds. On Duramax diesel models, the driver can also engage the diesel exhaust brake, which uses the variable vanes in the turbo- charger to smoothly and quietly create additional backpressure in the engine to help slow the vehicle. The 2015 Silverado HD offers three powertrains specifically tailored for tough tasks and dependable service. The standard engine is a 6.0L FlexFuel V-8 with continuously variable valve timing, which is rated at 360 horsepower and 380 lb.-ft. of torque – and tuned to deliver excellent low-rpm torque. It's matched with a six-speed automatic transmission. A bi-fuel version of the 6.0L V-8 is now offered on 2500 and 3500 models in all three cab styles. The system enables customers to switch easily between gasoline and compressed natural gas. The proven Duramax 6.6L turbodiesel and Allison 1000 six- speed automatic transmission combination will continue to be available on 2500HD and 3500HD models. 44 Landscape and Irrigation August 2014 www.landscapeirrigation.com Trucks 2015 Chevrolet Silverado 2500HD and 3500HD