2021 GMC Sierra 2500 HD MPG
Based on data from 71 vehicles, 4,443 fuel-ups and 1,431,549 miles of driving, the 2021 GMC Sierra 2500 HD gets a combined Avg MPG of 13.18 with a 0.11 MPG margin of error.
Below you can see a distribution of the fuel-ups with 19 outliers (0.43%) removed.
Following shows the average MPG of each of the 71 vehicles in the system.
2021 GMC Sierra 2500 HDs For Sale Nearby
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AT4 Whore
2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
Added Mar 2021 • 162 Fuel-upsProperty of pigpen23
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12.3 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD AT4 6.6L V8 GAS Automatic 6 Speed
Added May 2021 • 252 Fuel-upsProperty of Buellx72
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11.2 Avg MPG
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AT4
2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Oct 2022 • 84 Fuel-upsProperty of scrabble890
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14.3 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
Added Sep 2023 • 180 Fuel-upsProperty of SeB21
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17.0 Avg MPG
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2021
2021 GMC Sierra 2500 HD Denali Crew Cab Pickup
Added Dec 2020 • 203 Fuel-upsProperty of lampmant
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13.0 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Jul 2024 • 30 Fuel-upsProperty of josterhout1
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15.4 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 6 Speed
Added Nov 2024 • 16 Fuel-upsProperty of Anticyclone
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11.3 Avg MPG
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Dads Sierra 2500 HD
2021 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Jan 2025 • 7 Fuel-upsProperty of WillyM
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13.2 Avg MPG
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2021 Sierra 2500HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jan 2024 • 59 Fuel-upsProperty of Bost05
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12.6 Avg MPG
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2021 Sierra Denali HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Dec 2020 • 201 Fuel-upsProperty of LynnE24
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14.3 Avg MPG
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Big Bubba. My Sierra 2500 HD
2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
Added Jun 2021 • 111 Fuel-upsProperty of moose57
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16.6 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 10 Speed
Added Oct 2021 • 165 Fuel-upsProperty of bdamats
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11.1 Avg MPG
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DENALI 2021
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Dec 2020 • 126 Fuel-upsProperty of rivcoinc
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14.7 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Jan 2025 • 4 Fuel-upsProperty of keenwyatt
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13.5 Avg MPG
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Truck
2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
Added Nov 2024 • 4 Fuel-upsProperty of MontanaRaptor
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17.2 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 GAS Automatic 6 Speed
Added Aug 2021 • 57 Fuel-upsProperty of drjim
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12.3 Avg MPG
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2021 Denali HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Nov 2020 • 99 Fuel-upsProperty of DenaliDad
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14.7 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
Added Jul 2024 • 9 Fuel-upsProperty of jbhardman
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13.5 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Apr 2023 • 102 Fuel-upsProperty of bcfiremedic
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12.0 Avg MPG
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Sierra 2500 HD aka Sully
2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
Added May 2021 • 119 Fuel-upsProperty of Ryot
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12.0 Avg MPG