Sierra 2500HD and 3500HD The GMC Sierra 2500HD and 3500HD heavy-duty pickup trucks are the true workhorses of the Sierra lineup and are designed for hauling heavy payloads and towing large trailers.
Changes for 2018 include a standard backup camera on all models with a cargo bed, a standard 7-inch touchscreen radio for the base model and a new grille for the Denali version.
What’s Special
Standard 360-horsepower, 6.0-liter V-8
Available 445-hp, turbo-diesel 6.6-liter V-8 with 910 pounds-feet of torque
Maximum towing capacity of 20,000 pounds with a conventional trailer hitch (3500HD with dual rear wheels)
Maximum fifth-wheel or gooseneck towing capacity of 23,300 pounds (3500HD with dual rear wheels)