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January 23, 2019

2020 GMC Sierra HD Unveiling

The 2020 Sierra HD will be powered by the 6.6L turbo-diesel Duramax engine, which can generate...

The 2020 Sierra HD will be powered by the 6.6L turbo-diesel Duramax engine, which can generate 445 horsepower and 910 lb.-ft. of torque. An all-new Allison 10-speed automatic transmission is mated to the 6.6L Duramax turbo-diesel

The 2020 Sierra HD will be powered by the 6.6L turbo-diesel Duramax engine, which can generate 445 horsepower and 910 lb.-ft. of torque. An all-new Allison 10-speed automatic transmission is mated to the 6.6L Duramax turbo-diesel
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