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2020 GMC Sierra Heavy-Duty
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Towing 30,000 pounds in the 2020 gmc sierra hd
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Gmc cutting 2022 model year short for refreshed 2023 trucks .
2020 GMC Sierra 1500 Gets Key Powertrain and Towing Updates - The Car Guide
2021 GMC Sierra Gets Even Better Towing Technology | CarBuzz
2020 GMC Sierra Heavy-Duty
Towing 30,000 Pounds In The 2020 GMC Sierra HD | GM Authority
2021 GMC Sierra 1500 Towing Capacity | Payload, Trailiering | Engine Specs