2020 GMC Sierra 3500 HD MPG
Based on data from 42 vehicles, 2,179 fuel-ups and 778,747 miles of driving, the 2020 GMC Sierra 3500 HD gets a combined Avg MPG of 13.23 with a 0.16 MPG margin of error.
Below you can see a distribution of the fuel-ups with 51 outliers (2.29%) removed.
Following shows the average MPG of each of the 42 vehicles in the system.
2020 GMC Sierra 3500 HDs For Sale Nearby
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Jul 2020 • 178 Fuel-upsProperty of abartlett
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15.3 Avg MPG
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Denali 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Mar 2021 • 106 Fuel-upsProperty of 2010RWCM
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13.5 Avg MPG
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GMC Sierra 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Apr 2023 • 45 Fuel-upsProperty of audiododd
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13.9 Avg MPG
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2020 Sierra
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jan 2023 • 87 Fuel-upsProperty of brfs
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15.8 Avg MPG
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Denali HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added May 2024 • 16 Fuel-upsProperty of davijoh
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10.4 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Dec 2020 • 136 Fuel-upsProperty of ghurd
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14.2 Avg MPG
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Damon’s Sierra 3500 HD Denali
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Feb 2020 • 291 Fuel-upsProperty of Demon2JZ
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11.2 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
Added Jul 2024 • 3 Fuel-upsProperty of maddess00
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19.7 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Apr 2024 • 4 Fuel-upsProperty of Ranger473
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9.7 Avg MPG
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2020 GMC 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Mar 2020 • 366 Fuel-upsProperty of Gassy1976
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14.6 Avg MPG
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Dee 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Mar 2020 • 277 Fuel-upsProperty of deewhite
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13.0 Avg MPG
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2020 3500 HD Denali
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added May 2024 • 10 Fuel-upsProperty of bobsearle
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13.9 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 GAS Automatic 6 Speed
Added Jul 2020 • 83 Fuel-upsProperty of jdmich
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10.8 Avg MPG
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GMC
2020 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Nov 2022 • 69 Fuel-upsProperty of kitakidscomcastnet
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15.1 Avg MPG
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My Sierra 3500 HD Duramax
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Apr 2024 • 7 Fuel-upsProperty of Bscherr
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8.1 Avg MPG
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2020 Def
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Apr 2023 • 13 Fuel-upsProperty of brfs
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380.6 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Jul 2020 • 136 Fuel-upsProperty of hotsauce8815
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12.2 Avg MPG
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Star Lord vol. 2
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Jun 2021 • 37 Fuel-upsProperty of rpar86
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11.0 Avg MPG
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GMC PlanetKiller
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Dec 2022 • 39 Fuel-upsProperty of KyleMac
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14.7 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Jan 2020 • 7 Fuel-upsProperty of Alec55
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14.0 Avg MPG