2018 GMC Sierra 1500 MPG
Based on data from 193 vehicles, 17,945 fuel-ups and 5,072,208 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 246 outliers (1.35%) removed.
Following shows the average MPG of each of the 193 vehicles in the system.
2018 GMC Sierra 1500s For Sale Nearby
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
Added Apr 2018 • 229 Fuel-upsProperty of rleitht
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15.1 Avg MPG
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GMC Denali
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Oct 2022 • 62 Fuel-upsProperty of ArtieBar64
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16.6 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
Added Jan 2020 • 132 Fuel-upsProperty of retiredcb
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18.8 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 • 195 Fuel-upsProperty of jasonbrakhage
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14.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
Added Nov 2023 • 48 Fuel-upsProperty of bsimmons86
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13.0 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 • 263 Fuel-upsProperty of tootall518
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16.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Dec 2021 • 185 Fuel-upsProperty of riggity27
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14.9 Avg MPG
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GMC Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jun 2018 • 372 Fuel-upsProperty of Buckshot48
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17.9 Avg MPG
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2018 GMC Sierra
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Extended Cab Pickup
Added May 2018 • 464 Fuel-upsProperty of joenrox
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16.6 Avg MPG
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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 • 162 Fuel-upsProperty of rcorning
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18.2 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
Added Jan 2024 • 85 Fuel-upsProperty of Mr-GreenToCleanPools
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18.4 Avg MPG
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My Sierra
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Apr 2022 • 63 Fuel-upsProperty of cheapguy99
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12.7 Avg MPG
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Denali
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Jun 2024 • 28 Fuel-upsProperty of Jathroo
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16.2 Avg MPG
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Big Red Eskimo
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
Added Nov 2021 • 268 Fuel-upsProperty of rkfdwc1
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15.5 Avg MPG
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Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added Jan 2019 • 454 Fuel-upsProperty of jered6323
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14.3 Avg MPG
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Rooster
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Mar 2019 • 141 Fuel-upsProperty of x62605
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17.5 Avg MPG
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2018 GMC Sierra
2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
Added Oct 2018 • 195 Fuel-upsProperty of bgrinder90
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14.1 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed
Added Aug 2024 • 36 Fuel-upsProperty of o_dog2003
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16.7 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
Added May 2018 • 219 Fuel-upsProperty of wmdahler
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17.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
Added Jun 2024 • 18 Fuel-upsProperty of richardcfo
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20.6 Avg MPG