Please use care in your use of the information provided. How much horsepower and torque does a 2015 GMC Sierra 2500HD WT Regular Cab LWB have? The 2015 GMC Sierra 2500HD WT Regular Cab LWB is ...

The 2015 GMC Sierra HD is new this year. The Sierra HD gets new exterior and interior styling, and new features such as an integrated rear step in the rear bumper, a soft-opening tailgate ...