2021 GMC Sierra 1500 MPG
Based on data from 252 vehicles, 18,269 fuel-ups and 6,986,591 miles of driving, the 2021 GMC Sierra 1500 gets a combined Avg MPG of 20.37 with a 0.08 MPG margin of error.
Below you can see a distribution of the fuel-ups with 94 outliers (0.51%) removed.
Following shows the average MPG of each of the 252 vehicles in the system.
2021 GMC Sierra 1500s For Sale Nearby
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Nov 2021 • 61 Fuel-upsProperty of MLTGMC
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27.1 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added Feb 2021 • 117 Fuel-upsProperty of mastrodan3rd
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17.5 Avg MPG
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GMC Sierra 1500 Denali
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2021 • 156 Fuel-upsProperty of Slugster
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23.7 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
Added Jan 2021 • 189 Fuel-upsProperty of yesubyllib
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23.2 Avg MPG
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Brown D
2021 GMC Sierra 1500 SLE 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added May 2021 • 115 Fuel-upsProperty of sc402443
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24.3 Avg MPG
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Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Extended Cab Pickup
Added Dec 2023 • 63 Fuel-upsProperty of jameshawco
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24.0 Avg MPG
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2021 GMC Sierra SLT 1500 4WD
2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
Added Aug 2023 • 33 Fuel-upsProperty of blrains706
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23.9 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
Added Oct 2022 • 48 Fuel-upsProperty of mnm6080
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24.1 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Nov 2024 • 239 Fuel-upsProperty of AT4MPG
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25.1 Avg MPG
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Sierra Denali
2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed
Added May 2022 • 29 Fuel-upsProperty of bdoooh
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16.0 Avg MPG
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GMC Denali
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Jul 2022 • 59 Fuel-upsProperty of gtanner
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27.2 Avg MPG
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Sierra AT4
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Aug 2024 • 4 Fuel-upsProperty of rendrog
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23.8 Avg MPG
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Sierra 1500 Duramax
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Jul 2022 • 161 Fuel-upsProperty of jdrockin
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24.5 Avg MPG
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CarbonPro GMC
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Mar 2022 • 104 Fuel-upsProperty of sefowler
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24.6 Avg MPG
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GMC
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Extended Cab Pickup
Added Jan 2022 • 60 Fuel-upsProperty of johnny91750
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25.9 Avg MPG
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Denali
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Apr 2021 • 137 Fuel-upsProperty of stagrlee
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18.6 Avg MPG
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2021 AT4
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Sep 2021 • 51 Fuel-upsProperty of rvckstar
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22.7 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2021 • 57 Fuel-upsProperty of jps4di
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23.7 Avg MPG
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Caroline
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Feb 2023 • 43 Fuel-upsProperty of Ryharris
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21.9 Avg MPG
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Max
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jun 2024 • 5 Fuel-upsProperty of jluyk
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27.2 Avg MPG