2021 GMC Sierra 1500 MPG
Based on data from 249 vehicles, 17,741 fuel-ups and 6,767,940 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 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added May 2023 • 44 Fuel-upsProperty of Griffis89
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20.6 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 SLT
Added Jan 2023 • 120 Fuel-upsProperty of builder604
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16.5 Avg MPG
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White Walker
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Jun 2023 • 72 Fuel-upsProperty of imca35
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22.2 Avg MPG
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Elevation
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jun 2022 • 57 Fuel-upsProperty of hollywood703
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23.1 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Sep 2021 • 147 Fuel-upsProperty of rs4mtnitro
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22.2 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Jul 2021 • 225 Fuel-upsProperty of AT4-GLI
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23.4 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Sep 2021 • 185 Fuel-upsProperty of Biggs2021
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26.1 Avg MPG
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Sasha 2
2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic Crew Cab Pickup
Added Apr 2021 • 144 Fuel-upsProperty of fides893
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18.7 Avg MPG
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2021 GMC Sierra
2021 GMC Sierra 1500 SLE 5.3L V8 GAS Crew Cab Pickup
Added Mar 2024 • 44 Fuel-upsProperty of Roy2Chin
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18.9 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Aug 2021 • 155 Fuel-upsProperty of 76109
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19.0 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 • 114 Fuel-upsProperty of sc402443
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24.3 Avg MPG
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GMC Sierra
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jul 2024 • 23 Fuel-upsProperty of steven289
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26.2 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 SLE 2.7L L4 GAS Automatic 8 Speed
Added Jun 2022 • 121 Fuel-upsProperty of jctoss32986
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14.0 Avg MPG
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Lil White
2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Apr 2024 • 31 Fuel-upsProperty of zogeil
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20.0 Avg MPG
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My Sierra 1500 AT4
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added Jan 2021 • 147 Fuel-upsProperty of sfwalters
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18.8 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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Sierra
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added May 2021 • 64 Fuel-upsProperty of Adam2kSS
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22.0 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed
Added Jan 2024 • 43 Fuel-upsProperty of KGermany97
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17.4 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Aug 2024 • 13 Fuel-upsProperty of dillpill88
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16.6 Avg MPG