2018 GMC Sierra 1500 MPG
Based on data from 176 vehicles, 12,484 fuel-ups and 3,582,660 miles of driving, the 2018 GMC Sierra 1500 gets a combined Avg MPG of 16.25 with a 0.06 MPG margin of error.
Below you can see a distribution of the fuel-ups with 542 outliers (4.16%) removed.
Following shows the average MPG of each of the 176 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 6 Speed
Added Oct 2019 • 147 Fuel-upsProperty of iNative
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15.5 Avg MPG
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Glenn
2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Nov 2020 • 139 Fuel-upsProperty of ghcrawford
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15.0 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jan 2019 • 147 Fuel-upsProperty of cbinnie22
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16.0 Avg MPG
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Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jan 2019 • 287 Fuel-upsProperty of jered6323
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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 Apr 2022 • 3 Fuel-upsProperty of cheapguy99
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11.2 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 8 Speed
Added Feb 2019 • 132 Fuel-upsProperty of mpgapp
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14.4 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 • 128 Fuel-upsProperty of ScottyR
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14.0 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 • 54 Fuel-upsProperty of jjz3
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19.2 Avg MPG
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Black Betty
2018 GMC Sierra 1500 SLT 5.3L V8 ELECTRIC/GAS Automatic 6 Speed
Added Dec 2018 • 161 Fuel-upsProperty of tlawson85
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18.0 Avg MPG
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Denali
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Jan 2020 • 80 Fuel-upsProperty of Teutonics
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17.8 Avg MPG
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Big Red Eskimo
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
Added Nov 2021 • 54 Fuel-upsProperty of rkfdwc1
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15.2 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 • 119 Fuel-upsProperty of jasonbrakhage
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14.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Mar 2022 • 41 Fuel-upsProperty of nvolz
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16.7 Avg MPG
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2018 GMC Sierra
2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
Added Oct 2018 • 139 Fuel-upsProperty of bgrinder90
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14.1 Avg MPG
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Denali
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Oct 2021 • 33 Fuel-upsProperty of Philly9277
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15.6 Avg MPG
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Jolene
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Jul 2020 • 97 Fuel-upsProperty of eddiemoney
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17.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
Added Apr 2018 • 149 Fuel-upsProperty of rleitht
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15.1 Avg MPG
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2018 GMC Sierra Denali 4x4
2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed
Added Jun 2018 • 155 Fuel-upsProperty of mpg01
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16.7 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Dec 2021 • 52 Fuel-upsProperty of riggity27
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16.4 Avg MPG
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Sierra
2018 GMC Sierra 1500 Denali Automatic 8 Speed Crew Cab Pickup
Added Jul 2021 • 41 Fuel-upsProperty of ch56vy
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14.3 Avg MPG