The bow-tie brand boasts “best-in-class payload and conventional towing” for the new HD, which sounds mighty until you consider that the Silverado’s all-out towing with a fifth-wheel isn’t class-leading. Still, you can carry more weight in the Chevy’s bed and lug more behind its trailer hitch than you can with Ford’s Super Duty or Ram’s fifth-wheel-towing king, the 3500 HD. Lest we get mired too deeply in towing, the Silverado HD also follows the 2014 Silverado 1500’s lead and wears updated styling and packs new safety and convenience features.
If you like the way the Silverado 1500 looks, well, you’ll really like the 2015 2500 and 3500. That’s because the heavy-duty trucks look pretty much identical to the 1500, albeit with a slightly more bluff-like face. Because when talking HD trucks, almost everything comes back to towing, Chevrolet says it put a significant amount of work into the Silverado to enhance engine cooling through aerodynamically optimized ducts and better front-end sealing. Chevy also claims careful attention was paid to smoothing atmospheric flow over the tailgate and roof spoilers, proving that aerodynamic efficiency has a place even on vehicles shaped like houses.
The HDs also inherit the 1500’s cab improvements, including its stiffer construction, triple-sealed doors that are inset into the body for reduced noise, and classy interior. A bevy of USB, SD card, and power ports are available, and Chevrolet’s MyLink infotainment system is standard on all models save for the base work-truck HD variant. Just as the 1500 gained some interior room and switched to forward-hinged doors on extended-cab models, so do the 2500 and the 3500. Feel that? The topic of towing is pulling us again—this time concerning the dashboard, which was designed to put towing-specific controls close at hand. The optional trailer brake controller is positioned to the left of the steering wheel, the tow/haul button (which also operates the Auto Grade Braking transmission shift map) is fitted to the end of the shifter, and on models equipped with the Duramax diesel engine, the exhaust brake can be activated via a dash button.
In contrast to the reworked body and interior, the 2015 Silverado HD models’ two available powertrains carry over unchanged. A gas-fed, 6.0-liter V-8 mated to a six-speed automatic brings 360 horsepower and 380 lb-ft of torque to the towing party, although it makes 322 ponies in 3500 models. A bi-fuel option for the V-8 facilitates a compressed-natural-gas conversion with hardened valves and valve seats. Both 2500 and 3500 Silverados keep GM’s 6.6-liter Duramax diesel engine on their option sheets; the burly mill makes 397 horsepower and 765 lb-ft of twist. The diesel again comes paired with a six-speed Allison 1000 automatic transmission.
Thanks to: Car and Driver