2018 GMC Sierra 1500 MPG
Based on data from 186 vehicles, 16,512 fuel-ups and 4,662,378 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 240 outliers (1.43%) 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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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Oct 2019 • 327 Fuel-upsProperty of iNative
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15.7 Avg MPG
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GMC Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jan 2018 • 64 Fuel-upsProperty of Phlip
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16.8 Avg MPG
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Black Betty
2018 GMC Sierra 1500 SLT 5.3L V8 ELECTRIC/GAS Automatic 6 Speed
Added Dec 2018 • 298 Fuel-upsProperty of tlawson85
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18.1 Avg MPG
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Sierra
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
Added Oct 2023 • 18 Fuel-upsProperty of Jhs4
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15.0 Avg MPG
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Gus’s Denali
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added May 2019 • 202 Fuel-upsProperty of enszc
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15.0 Avg MPG
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Jimmy
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Jan 2018 • 205 Fuel-upsProperty of cowpen
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19.0 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 • 80 Fuel-upsProperty of jscott2126
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15.5 Avg MPG
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2018 Sierra
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
Added Nov 2018 • 258 Fuel-upsProperty of gerickson24
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13.9 Avg MPG
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Big Red Eskimo
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
Added Nov 2021 • 217 Fuel-upsProperty of rkfdwc1
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15.2 Avg MPG
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Jolene
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Jul 2020 • 163 Fuel-upsProperty of eddiemoney
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17.1 Avg MPG
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GMC Sierra 1500 2018
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Apr 2018 • 172 Fuel-upsProperty of JLF52
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18.8 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 8 Speed
Added Nov 2018 • 221 Fuel-upsProperty of epedro40
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16.1 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 • 373 Fuel-upsProperty of CAHayes1109
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13.9 Avg MPG
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Sierra
2018 GMC Sierra 1500 Denali Automatic 8 Speed Crew Cab Pickup
Added Jul 2021 • 93 Fuel-upsProperty of ch56vy
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13.6 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 • 234 Fuel-upsProperty of tootall518
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16.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
Added Jan 2024 • 28 Fuel-upsProperty of Mr-GreenToCleanPools
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19.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added May 2018 • 195 Fuel-upsProperty of wmdahler
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17.3 Avg MPG
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GMC Sierra Black
2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
Added Jun 2020 • 217 Fuel-upsProperty of rickwhaas
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17.6 Avg MPG
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Denali
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Jan 2020 • 124 Fuel-upsProperty of Teutonics
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17.4 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
Added Jan 2018 • 144 Fuel-upsProperty of nmason42
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15.0 Avg MPG