2021 GMC Sierra 1500 MPG
Based on data from 249 vehicles, 17,722 fuel-ups and 6,760,235 miles of driving, the 2021 GMC Sierra 1500 gets a combined Avg MPG of 20.33 with a 0.09 MPG margin of error.
Below you can see a distribution of the fuel-ups with 92 outliers (0.52%) removed.
Following shows the average MPG of each of the 249 vehicles in the system.
2021 GMC Sierra 1500s For Sale Nearby
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Big Papa
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Mar 2024 • 16 Fuel-upsProperty of jtdupuis
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24.1 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
Added Jan 2021 • 186 Fuel-upsProperty of yesubyllib
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23.2 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2020 • 155 Fuel-upsProperty of crs5011
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24.7 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
Added Jul 2021 • 74 Fuel-upsProperty of CJ_KC
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25.0 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 Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Mar 2021 • 198 Fuel-upsProperty of MWC_64
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23.0 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed
Added Sep 2023 • 45 Fuel-upsProperty of MysticMissile4
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17.3 Avg MPG
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Night Train
2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed
Added Aug 2021 • 363 Fuel-upsProperty of jbab2004
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19.5 Avg MPG
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2021 GMC Sierra 1500 Denali
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added May 2021 • 94 Fuel-upsProperty of GlenatTBP
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23.5 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
Added Jul 2023 • 63 Fuel-upsProperty of snoogans7031
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17.3 Avg MPG
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2021 GMC
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Nov 2021 • 238 Fuel-upsProperty of ahartman
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16.6 Avg MPG
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GMC AT4
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jan 2021 • 149 Fuel-upsProperty of GMCAT4
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22.5 Avg MPG
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GMC Sierra 1500
2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Nov 2024 • 21 Fuel-upsProperty of zwood131
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22.9 Avg MPG
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21Elevation-X31
2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed Extended Cab Pickup
Added Dec 2023 • 41 Fuel-upsProperty of csfx8588
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18.6 Avg MPG
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Sierra
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Jul 2021 • 94 Fuel-upsProperty of whippo3
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23.5 Avg MPG
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Lucille
2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
Added Oct 2023 • 45 Fuel-upsProperty of kwhight
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17.9 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added Aug 2024 • 13 Fuel-upsProperty of jacobgoff
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17.0 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Mar 2021 • 157 Fuel-upsProperty of flodin30
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24.1 Avg MPG
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2021 Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Sep 2022 • 99 Fuel-upsProperty of milcher
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21.2 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Nov 2021 • 60 Fuel-upsProperty of MLTGMC
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27.1 Avg MPG