2017 GMC Sierra Denali 1500 & 2500HD – Video
The Sierra 2500 HD shares its chassis with the Chevy Silverado 2500 HD but wears Prada instead of work boots. It offers the same three cab styles, five wheelbases, two bed lengths, and three engines: 6.0- and 6.0-liter gas/CNG V-8s and our favorite, the Duramax 6.6-liter turbodiesel with the Allison transmission. Maximum payload is 4043 lb; maximum towing (when properly equipped) is 18,000 lb. The 2500 HD boasts aggressive styling, über-luxurious interiors, and carlike sophistication.
The Sierra aims to present itself as a more upscale, premium version of the Chevrolet Silverado—but beneath the GMC’s sculpted sheetmetal and nicer trim, the two are basically the same. The base engine is a 285-hp V-6; optional engines include a 355-hp V-8 and a 420-hp V-8. The maximum payload is 2260 lb; maximum towing is 12,000 lb. Regular cabs offer 6.5-ft or 8-ft boxes; double cabs have a 6.5-ft box and crew cabs offer a 5’8” box or a 6.5-ft box. All-wheel drive is optional for all models.