What is the all-new 2020 GMC Sierra HD all about? How do you introduce the new truck to the world? GMC chose a boat yard and pulled a 225,000 lbs crane and boat with a 3500 HD dually. In this video, we take a very detailed look at the new truck and interview the chief engineer.
The new heavy duty is longer and taller than ever before. The 6.6L Duramax diesel V8 is still there, but it’s mated to a 10-speed automatic transmission. The new heavy duty truck will be able to tow “well in excess of 30,000 lbs”, according to GMC.
The company is not releasing the new chassis details, but the frame is updated to handle heavier payload and towing capacities. GMC also did not release precise payload or towing specifications. All of this information will be available at a future event.
The new truck is powered by the 6.6L turbo-diesel with a rating of 445 horsepower and 910 lb-ft of torque. It’s mated to a 10-speed Allison-branded automatic transmission. We do not yet have the details about the new gas V8 that will replace the 6.0L Vortec V8.
The 2020 Sierra HD is using many innovations that are also found on the new 2019 Sierra 1500, and then adds more. The 2020 heavy duty is using the interior design that is nearly identical to that of the half-ton trucks (including the AT4 off-road model). The HD beds are now wider to accomodate more cargo volume, and the Multi-pro tailgate is also available, although the heavy-duty version of the multi-component tailgate has different dimensions from the light duty version.
The Diesel Exhaust Fluid (DEF) filler and tank are relocated. The DEF filler is inside the fuel filler door on the driver side. The DEF tank is no longer underneath the front passenger side.
While pricing is not yet available, the 2020 GMC Sierra heavy duty trucks will go on sale in the late summer 2019.