2021 GMC Sierra 1500 MPG
Based on data from 247 vehicles, 16,978 fuel-ups and 6,450,372 miles of driving, the 2021 GMC Sierra 1500 gets a combined Avg MPG of 20.28 with a 0.09 MPG margin of error.
Below you can see a distribution of the fuel-ups with 91 outliers (0.53%) removed.
Following shows the average MPG of each of the 247 vehicles in the system.
2021 GMC Sierra 1500s For Sale Nearby
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My Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Feb 2024 • 48 Fuel-upsProperty of BigBoostDSM
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15.6 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
Added Jul 2023 • 50 Fuel-upsProperty of snoogans7031
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17.0 Avg MPG
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Sierra
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Sep 2023 • 36 Fuel-upsProperty of alex10haken
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21.6 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Nov 2021 • 65 Fuel-upsProperty of steamroller69633
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15.6 Avg MPG
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2021 GMC Sierra
2021 GMC Sierra 1500 SLE 5.3L V8 GAS Crew Cab Pickup
Added Mar 2024 • 27 Fuel-upsProperty of Roy2Chin
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18.7 Avg MPG
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Lucille
2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
Added Oct 2023 • 37 Fuel-upsProperty of kwhight
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18.0 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Nov 2021 • 55 Fuel-upsProperty of MLTGMC
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26.9 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Aug 2021 • 63 Fuel-upsProperty of jcg2009
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22.0 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added May 2023 • 38 Fuel-upsProperty of Griffis89
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20.7 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed
Added Aug 2021 • 98 Fuel-upsProperty of johnoutdoors
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21.6 Avg MPG
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Her Sierra 1500 Denali
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Mar 2021 • 74 Fuel-upsProperty of davisfarm86
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21.9 Avg MPG
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My GMC Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Nov 2021 • 88 Fuel-upsProperty of ndodge3
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27.1 Avg MPG
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Clay 2021 Sierra 1500
2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Feb 2021 • 100 Fuel-upsProperty of chriii
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13.7 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2020 • 113 Fuel-upsProperty of travreed22
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23.2 Avg MPG
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Stormtrooper AT4
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Oct 2023 • 28 Fuel-upsProperty of SoCalEco14
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19.5 Avg MPG
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GMC SD
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added May 2023 • 40 Fuel-upsProperty of burkian
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25.6 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 SLE 3.0L L6 DIESEL Automatic 10 Speed
Added Sep 2021 • 87 Fuel-upsProperty of Istijour
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23.9 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added May 2021 • 72 Fuel-upsProperty of crowan43
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21.6 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 • 29 Fuel-upsProperty of blrains706
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24.0 Avg MPG
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Whipp'd
2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Jun 2021 • 100 Fuel-upsProperty of DCsells
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14.1 Avg MPG