Full-size three- or six-seat pickup truck Turbo four-cylinder, V-8 or six-cylinder diesel engine Rear- or four-wheel drive Eight-speed automatic (four-cylinder) or 10-speed automatic (all other ...

For 2017, the GMC Sierra 2500HD and 3500HD are now offered with a more potent Duramax 6.6-liter turbocharged diesel engine ... 2017 GMC Sierra and gasoline-powered Sierra HD pickup trucks. Three new ...