2021 GMC Sierra 1500 MPG
Based on data from 249 vehicles, 17,750 fuel-ups and 6,770,554 miles of driving, the 2021 GMC Sierra 1500 gets a combined Avg MPG of 20.33 with a 0.08 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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My Sierra 1500
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2022 • 85 Fuel-upsProperty of Texasoffshore
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22.0 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2020 • 257 Fuel-upsProperty of SilverSully83
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24.2 Avg MPG
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2021 GMC Sierra AT4
2021 GMC Sierra 1500 AT4 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Feb 2024 • 49 Fuel-upsProperty of banditz
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20.8 Avg MPG
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'21 White AT4 DuraMax
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Dec 2020 • 132 Fuel-upsProperty of APokowski
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20.6 Avg MPG
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Dangmc
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Dec 2023 • 3 Fuel-upsProperty of Dangmc
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23.0 Avg MPG
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Sierra 1500
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added Dec 2020 • 171 Fuel-upsProperty of rdurbin
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15.5 Avg MPG
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2021 Sierra 1500
2021 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Feb 2021 • 149 Fuel-upsProperty of Bost05
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14.5 Avg MPG
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GMC Sierra 1500
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Nov 2023 • 3 Fuel-upsProperty of firemech
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35.7 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2021 • 62 Fuel-upsProperty of dphi201
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23.4 Avg MPG
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Bigfoot
2021 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Mar 2022 • 75 Fuel-upsProperty of White-Denali
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16.0 Avg MPG
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My 2021 Sierra 1500
2021 GMC Sierra 1500 Denali 3,0L L6 DIESEL Automatic 10 Speed
Added Apr 2021 • 12 Fuel-upsProperty of shadow_za
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23.4 Avg MPG
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3.0 AT4
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Sep 2021 • 59 Fuel-upsProperty of Timmy59360
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22.9 Avg MPG
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Sierra
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jan 2022 • 72 Fuel-upsProperty of jc9995
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25.5 Avg MPG
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Thot Yacht
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jun 2021 • 73 Fuel-upsProperty of TrevorBarrett
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23.7 Avg MPG
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Arnold
2021 GMC Sierra 1500 AT4 5.3L V8 GAS Automatic 10 Speed
Added Nov 2020 • 281 Fuel-upsProperty of st333
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14.7 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Jun 2021 • 137 Fuel-upsProperty of tgutwein
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25.2 Avg MPG
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GMC AT4
2021 GMC Sierra 1500 AT4 5.3L V8 GAS Automatic 10 Speed
Added Apr 2021 • 68 Fuel-upsProperty of fuelburner
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13.4 Avg MPG
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GMC TOWING
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Aug 2023 • 3 Fuel-upsProperty of l1tech
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13.1 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 10 Speed
Added Oct 2023 • 8 Fuel-upsProperty of jiro_franco
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14.8 Avg MPG
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‘21 GMC Sierra
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Jan 2023 • 51 Fuel-upsProperty of BigL31
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24.9 Avg MPG