2021 GMC Sierra 1500 MPG
Based on data from 250 vehicles, 17,775 fuel-ups and 6,779,747 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 (0.51%) removed.
Following shows the average MPG of each of the 250 vehicles in the system.
2021 GMC Sierra 1500s For Sale Nearby
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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
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2021 GMC
2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Nov 2023 • 32 Fuel-upsProperty of JayG60
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21.8 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 8 Speed
Added Oct 2020 • 124 Fuel-upsProperty of jleehop
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25.2 Avg MPG
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AT4
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Dec 2021 • 41 Fuel-upsProperty of dismonio
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24.0 Avg MPG
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GMC
2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Jul 2021 • 108 Fuel-upsProperty of edwin191
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18.5 Avg MPG
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MyGMCDiesel
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Extended Cab Pickup
Added Feb 2021 • 153 Fuel-upsProperty of IndyLM2GMC
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23.9 Avg MPG
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Maverick
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added Feb 2021 • 140 Fuel-upsProperty of mvprealestate
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15.6 Avg MPG
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Ray’s Truck
2021 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 10 Speed
Added Jun 2023 • 8 Fuel-upsProperty of Wrongway88
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13.5 Avg MPG
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GMC Sierra 1500 Elevation
2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2021 • 35 Fuel-upsProperty of amtrak8
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24.5 Avg MPG
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Presious
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jun 2021 • 92 Fuel-upsProperty of njaybong
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24.9 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Apr 2021 • 84 Fuel-upsProperty of joh02051
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19.3 Avg MPG
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Sierra
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Apr 2023 • 11 Fuel-upsProperty of shiftracer247
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19.9 Avg MPG
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My Sierra 1500
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added Apr 2021 • 63 Fuel-upsProperty of titan1727
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17.6 Avg MPG
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A19639 2021 Black Sierra 1500
2021 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 10 Speed
Added Mar 2023 • 17 Fuel-upsProperty of Robbo1968
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6.5 Avg MPG
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AT4
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Apr 2021 • 52 Fuel-upsProperty of jbainton
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24.2 Avg MPG
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Old
2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added May 2021 • 123 Fuel-upsProperty of cdean72
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14.2 Avg MPG
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21 Sierra
2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Nov 2020 • 84 Fuel-upsProperty of wildman22john
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15.6 Avg MPG
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2021 Sierra 1500
2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed
Added Dec 2020 • 70 Fuel-upsProperty of bennybeat
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17.0 Avg MPG
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Blue
2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Jan 2022 • 32 Fuel-upsProperty of gregair310
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24.5 Avg MPG
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My Sierra 1500 AT4
2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Sep 2021 • 50 Fuel-upsProperty of robtwillis
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18.3 Avg MPG