2020 GMC Sierra 3500 HD MPG
Based on data from 42 vehicles, 2,306 fuel-ups and 824,016 miles of driving, the 2020 GMC Sierra 3500 HD gets a combined Avg MPG of 13.25 with a 0.16 MPG margin of error.
Below you can see a distribution of the fuel-ups with 53 outliers (2.25%) 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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2020 GMC 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Mar 2020 • 387 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 6 Speed
Added Jul 2024 • 13 Fuel-upsProperty of maddess00
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17.6 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 • 86 Fuel-upsProperty of jdmich
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10.7 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
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Dec 2020 • 148 Fuel-upsProperty of ghurd
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14.3 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 • 40 Fuel-upsProperty of rpar86
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11.2 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 • 105 Fuel-upsProperty of brfs
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15.9 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 • 183 Fuel-upsProperty of abartlett
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15.4 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 • 54 Fuel-upsProperty of audiododd
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13.8 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 • 36 Fuel-upsProperty of davijoh
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11.8 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 • 23 Fuel-upsProperty of bobsearle
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13.8 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 • 115 Fuel-upsProperty of 2010RWCM
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13.6 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Apr 2024 • 11 Fuel-upsProperty of Ranger473
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13.0 Avg MPG
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My Sierra 3500 HD
2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added May 2020 • 6 Fuel-upsProperty of wedgie321
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10.7 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 • 13 Fuel-upsProperty of Bscherr
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8.4 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 • 73 Fuel-upsProperty of kitakidscomcastnet
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14.4 Avg MPG
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GMC PlanetKiller
2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Dec 2022 • 44 Fuel-upsProperty of KyleMac
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14.2 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 • 14 Fuel-upsProperty of brfs
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380.6 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 • 283 Fuel-upsProperty of deewhite
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12.9 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 • 293 Fuel-upsProperty of Demon2JZ
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11.2 Avg MPG