2018 GMC Sierra 1500 MPG
Based on data from 186 vehicles, 16,541 fuel-ups and 4,670,881 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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Rich's Truck
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
Added Jul 2019 • 142 Fuel-upsProperty of rcorning
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18.0 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 8 Speed
Added Nov 2018 • 222 Fuel-upsProperty of epedro40
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16.0 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Dec 2021 • 156 Fuel-upsProperty of riggity27
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14.9 Avg MPG
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Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jan 2019 • 426 Fuel-upsProperty of jered6323
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14.5 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jan 2019 • 221 Fuel-upsProperty of cbinnie22
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15.6 Avg MPG
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Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added May 2021 • 111 Fuel-upsProperty of gabeyoung
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11.8 Avg MPG
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2018 GMC Sierra Denali 4x4
2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Jun 2018 • 245 Fuel-upsProperty of mpg01
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17.2 Avg MPG
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My Sierra
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Apr 2022 • 45 Fuel-upsProperty of cheapguy99
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12.4 Avg MPG
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GMC Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jun 2018 • 329 Fuel-upsProperty of Buckshot48
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17.8 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
Added Apr 2018 • 209 Fuel-upsProperty of rleitht
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15.0 Avg MPG
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GMC Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jan 2018 • 64 Fuel-upsProperty of Phlip
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16.8 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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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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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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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