Everything You Ever Want to Know: 2015 Chevrolet Silverado HD and GMC Sierra HD

2015 gmc sierra hd duramax dually

The 2015 Chevrolet Silverado HD and GMC Sierra HD are thoroughly refreshed.  Both exterior and interior are updated and the most significant change happening on the inside.  The new heavy duty line builds on the design introduced with the 2014 light duty trucks.  The interior looks and feels much more upscale than before, and the layout makes a lot of sense.  The new trucks are quieter thanks for inlay door design and easier to get in a out of thanks to clever seat design.

The trucks did not change underneath.  The 2500HD 6.0-liter Vortec is rated at: 360 hp and 380 lb-ft and can be ordered with CNG fuel capability.  The Duramax is still at 397 hp and 765 lb-ft of torque.  The rear end ratios are the same as well.  Cab and bed configurations are the same as well, except the old “extended cab” is now call “double cab” and has four forward opening doors.

2015 chevy silverado hd heavy duty interior

The truck’s capability has been increased, as you can see here:

2014 Silverado 2500 HD 2015 Silverado 2500 HD
Max Payload 3,670 lbs 4,306 lbs
Conventional Max Tow 13,000 lbs 14,500 lbs
5th Wheel Max Tow 14,700 lbs 17,900 lbs
2014 Silverado 3500 HD 2015 Silverado 3500 HD
Max Payload 7,222 lbs 7,374 lbs
Conventional Max Tow 16,000 lbs 19,600 lbs
5th Wheel Max Tow 23,100 lbs 23,200 lbs

Check out this insider TFLtruck video for an interview with the executive engineer.  Here you can learn the details behind the redesigned 2015 Silverado and Sierra Heavy Duty pickups.

Andre Smirnov

Andre Smirnov is a life-long automotive enthusiast, writer, reporter, and software engineer. He has been a contributor at TFL since 2011. When not working or spending time with the family – you can find him tinkering in the garage or simply ‘going for a drive’.