2018 GMC Sierra 1500 MPG
Based on data from 186 vehicles, 16,347 fuel-ups and 4,617,498 miles of driving, the 2018 GMC Sierra 1500 gets a combined Avg MPG of 15.97 with a 0.05 MPG margin of error.
Below you can see a distribution of the fuel-ups with 236 outliers (1.42%) removed.
Following shows the average MPG of each of the 186 vehicles in the system.
2018 GMC Sierra 1500s For Sale Nearby
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Rich's Truck
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
Added Jul 2019 • 136 Fuel-upsProperty of rcorning
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18.0 Avg MPG
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GMC Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jan 2018 • 62 Fuel-upsProperty of Phlip
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16.7 Avg MPG
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GMC Denali
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Oct 2022 • 43 Fuel-upsProperty of ArtieBar64
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16.5 Avg MPG
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GMC
2018 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 8 Speed Crew Cab Pickup
Added Jul 2022 • 76 Fuel-upsProperty of jscott2126
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15.5 Avg MPG
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2018 GMC Sierra
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
Added Apr 2022 • 149 Fuel-upsProperty of rtsteen
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17.7 Avg MPG
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Sierra
2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Oct 2018 • 169 Fuel-upsProperty of ScottyR
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13.9 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
Added Sep 2022 • 12 Fuel-upsProperty of conan05
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13.3 Avg MPG
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Quicksilver
2018 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
Added Jun 2020 • 230 Fuel-upsProperty of tootall518
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16.3 Avg MPG
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Denali
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Jan 2018 • 354 Fuel-upsProperty of Godofwine7
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15.9 Avg MPG
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Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added May 2021 • 108 Fuel-upsProperty of gabeyoung
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11.8 Avg MPG
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Sierra
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
Added Apr 2019 • 371 Fuel-upsProperty of CAHayes1109
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13.9 Avg MPG
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Truck
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Mar 2020 • 173 Fuel-upsProperty of jasonbrakhage
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14.3 Avg MPG
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Sierra
2018 GMC Sierra 1500 Denali Automatic 8 Speed Crew Cab Pickup
Added Jul 2021 • 89 Fuel-upsProperty of ch56vy
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13.7 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Aug 2019 • 15 Fuel-upsProperty of jessbeavers
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25.4 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 5.3L V8 GAS Automatic 6 Speed
Added Oct 2022 • 162 Fuel-upsProperty of Mstc
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15.5 Avg MPG
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Truck
2018 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed Standard Cab Pickup
Added May 2019 • 7 Fuel-upsProperty of mcgannd
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24.8 Avg MPG
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2018GMC SIERRA 4X4
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Feb 2020 • 90 Fuel-upsProperty of jjz3
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19.0 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
Added Sep 2018 • 322 Fuel-upsProperty of Polar800
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13.9 Avg MPG
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GMC 1500 4x4
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Feb 2018 • 197 Fuel-upsProperty of kiscl
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14.7 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Sep 2018 • 125 Fuel-upsProperty of rinman
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15.1 Avg MPG