Can a new gas-powered 2024 Chevy Silverado HD be competitive versus a diesel equivalent truck in efficiency and towing confidence? This is why we do real-world testing. This time it’s the new 6.6L gas V8 and 10-speed automatic combo under the hood of a new Silverado heavy-duty truck versus the Denver 100 mpg loop. I drive 111 miles in this nicely-equipped LTZ crew cab 4×4 unloaded and with a 10,600 lbs trailer. I want to see how this new powertrain compares against the previous gasser with a 6-speed automatic, and how it compares against the Duramax-powered trucks.
Here is what we are comparing against.
2024 Chevy Silverado HD 2500: 6.6L Duramax turbo-diesel V8: 18.1 MPG (very Windy conditions).
2020 Chevy Silverado HD 2500: 6.6L Duramax turbo-diesel V8: 19.9 MPG (Road-trip).
2024 Chevy Silverado HD 3500 SRW: 6.6L Duramax turbo-diesel V8: towing 10,600 lbs: 11.5 MPG
2020 Chevy Silverado HD 2500: 6.6L “tiger-jet” gas V8: 16.3 MPG
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