2021 GMC Sierra 2500 HD MPG
Based on data from 57 vehicles, 2,432 fuel-ups and 768,010 miles of driving, the 2021 GMC Sierra 2500 HD gets a combined Avg MPG of 13.13 with a 0.15 MPG margin of error.
Below you can see a distribution of the fuel-ups with 9 outliers (0.37%) removed.
Following shows the average MPG of each of the 57 vehicles in the system.
2021 GMC Sierra 2500 HDs For Sale Nearby
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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 • 60 Fuel-upsProperty of moose57
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17.1 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
Added Apr 2023 • 30 Fuel-upsProperty of mcgr0401
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11.0 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 • 91 Fuel-upsProperty of bdamats
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11.1 Avg MPG
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BigTruck
2021 GMC Sierra 2500 HD 6.6L V8 GAS Automatic 6 Speed Crew Cab Pickup
Added Mar 2023 • 27 Fuel-upsProperty of pmhanson
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14.6 Avg MPG
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2021 Sierra Denali HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Feb 2021 • 99 Fuel-upsProperty of ccc2511
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16.0 Avg MPG
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2021 2500HD Denali
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Apr 2021 • 109 Fuel-upsProperty of DP68
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17.1 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 • 65 Fuel-upsProperty of DenaliDad
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14.5 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 • 142 Fuel-upsProperty of Buellx72
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11.5 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 GAS Automatic 6 Speed
Added Nov 2021 • 75 Fuel-upsProperty of Danm1228
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11.5 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 • 72 Fuel-upsProperty of rivcoinc
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14.2 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 • 123 Fuel-upsProperty of LynnE24
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14.6 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 10 Speed
Added Jan 2023 • 34 Fuel-upsProperty of Croybal06
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14.2 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 • 40 Fuel-upsProperty of scrabble890
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15.2 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD AT4 6.6L V8 GAS Automatic 6 Speed
Added Jun 2021 • 116 Fuel-upsProperty of gregnola
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12.4 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD SLT 6.6L V8 GAS Automatic 6 Speed
Added Jan 2021 • 26 Fuel-upsProperty of NGreen08
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10.9 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
Added Dec 2022 • 22 Fuel-upsProperty of ryanhnicholson
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12.0 Avg MPG
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2021
2021 GMC Sierra 2500 HD Denali Crew Cab Pickup
Added Dec 2020 • 118 Fuel-upsProperty of lampmant
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12.6 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 • 6 Fuel-upsProperty of bcfiremedic
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13.0 Avg MPG
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My Sierra 2500 HD
2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
Added Jun 2021 • 91 Fuel-upsProperty of xETERNALx
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13.5 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 • 73 Fuel-upsProperty of Ryot
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12.2 Avg MPG