2020 GMC Sierra 1500 MPG
Based on data from 192 vehicles, 15,640 fuel-ups and 5,155,451 miles of driving, the 2020 GMC Sierra 1500 gets a combined Avg MPG of 18.22 with a 0.08 MPG margin of error.
Below you can see a distribution of the fuel-ups with 351 outliers (2.19%) removed.
Following shows the average MPG of each of the 192 vehicles in the system.
2020 GMC Sierra 1500s For Sale Nearby
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My Sierra 1500
2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Jan 2023 • 18 Fuel-upsProperty of MotorBoater
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25.8 Avg MPG
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2020 Sierra
2020 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
Added Sep 2020 • 112 Fuel-upsProperty of wvajeff
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15.8 Avg MPG
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Big Gray
2020 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 8 Speed
Added Oct 2020 • 91 Fuel-upsProperty of wirowek
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23.7 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed
Added Oct 2021 • 53 Fuel-upsProperty of nightstick320
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19.7 Avg MPG
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Denna
2020 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Dec 2020 • 90 Fuel-upsProperty of knightbsandy
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24.3 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed
Added Oct 2020 • 48 Fuel-upsProperty of dphillippe
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20.1 Avg MPG
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2020 Sierra - Towing
2020 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Aug 2020 • 31 Fuel-upsProperty of Rexpelagi
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19.4 Avg MPG
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2020 GMC Sierra 1500 AT4
2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added May 2020 • 94 Fuel-upsProperty of blkcheech
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16.8 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Aug 2020 • 46 Fuel-upsProperty of willyihts
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23.7 Avg MPG
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Iron
2020 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Apr 2020 • 68 Fuel-upsProperty of andyh1
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23.8 Avg MPG
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GMC Sierra
2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Feb 2021 • 13 Fuel-upsProperty of Larsan90
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24.8 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added Sep 2020 • 54 Fuel-upsProperty of shawsvale
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17.0 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
Added Sep 2020 • 171 Fuel-upsProperty of ImpRoma
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18.6 Avg MPG
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Duramax 3.0 on 34’s
2020 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
Added Sep 2020 • 31 Fuel-upsProperty of thechadwickk
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22.5 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
Added Mar 2022 • 12 Fuel-upsProperty of JMcCabe
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19.1 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
Added Feb 2021 • 55 Fuel-upsProperty of Nailer18
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22.4 Avg MPG
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Sierra SLT
2020 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
Added Aug 2020 • 40 Fuel-upsProperty of PtownVdub
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22.3 Avg MPG
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2020 GMC
2020 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed
Added Feb 2020 • 70 Fuel-upsProperty of garretn
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18.0 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
Added Feb 2020 • 39 Fuel-upsProperty of TheCrazyLudwig
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24.1 Avg MPG
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My Sierra 1500
2020 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed
Added Feb 2022 • 5 Fuel-upsProperty of robbycruz52
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19.1 Avg MPG