2020 GMC Sierra 3500 HD MPG
Based on data from 37 vehicles, 2,039 fuel-ups and 730,384 miles of driving, the 2020 GMC Sierra 3500 HD gets a combined Avg MPG of 13.26 with a 0.17 MPG margin of error.
Below you can see a distribution of the fuel-ups with 45 outliers (2.16%) removed.
Following shows the average MPG of each of the 37 vehicles in the system.
2020 GMC Sierra 3500 HDs For Sale Nearby
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Dee 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Mar 2020 • 257 Fuel-upsProperty of deewhite
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13.0 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 • 63 Fuel-upsProperty of brfs
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16.0 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 • 96 Fuel-upsProperty of 2010RWCM
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13.5 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 • 348 Fuel-upsProperty of Gassy1976
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14.6 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Jul 2020 • 167 Fuel-upsProperty of abartlett
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15.2 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 • 283 Fuel-upsProperty of Demon2JZ
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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 • 37 Fuel-upsProperty of KyleMac
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14.2 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 • 122 Fuel-upsProperty of ghurd
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14.3 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 • 41 Fuel-upsProperty of audiododd
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13.6 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 • 35 Fuel-upsProperty of rpar86
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10.8 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Mar 2024 • 5 Fuel-upsProperty of mlgriffin
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15.8 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 • 130 Fuel-upsProperty of hotsauce8815
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12.0 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 • 75 Fuel-upsProperty of jdmich
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11.0 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 • 8 Fuel-upsProperty of brfs
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721.2 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
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GMC
2020 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Nov 2022 • 63 Fuel-upsProperty of kitakidscomcastnet
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15.2 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Jun 2020 • 152 Fuel-upsProperty of fox454
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15.1 Avg MPG
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My Denali
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Mar 2020 • 109 Fuel-upsProperty of cmayfield682
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17.2 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Mar 2020 • 41 Fuel-upsProperty of freedom2020
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8.2 Avg MPG
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My Sierra 3500 HD #1
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Nov 2022 • 3 Fuel-upsProperty of Blueyfella
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5.7 Avg MPG