2018 GMC Sierra 1500 MPG
Based on data from 193 vehicles, 17,926 fuel-ups and 5,067,207 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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GMC Sierra 1500
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Jun 2018 • 230 Fuel-upsProperty of ndsewall
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16.0 Avg MPG
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033
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
Added Mar 2024 • 24 Fuel-upsProperty of jirpol
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15.2 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 • 93 Fuel-upsProperty of jscott2126
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15.4 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
Added Jun 2024 • 4 Fuel-upsProperty of blackandwhiteX6
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17.2 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
Added May 2024 • 5 Fuel-upsProperty of MHingley
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16.4 Avg MPG
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GMC Sierra 1500 SLT
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Jul 2018 • 50 Fuel-upsProperty of Dirtpig
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17.6 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
Added Sep 2018 • 324 Fuel-upsProperty of Polar800
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13.9 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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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 6 Speed
Added Dec 2018 • 261 Fuel-upsProperty of e37292
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17.0 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 • 76 Fuel-upsProperty of Philly9277
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15.2 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Jun 2022 • 88 Fuel-upsProperty of sierradenali6-2
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13.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
Added Feb 2019 • 166 Fuel-upsProperty of mskalak
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15.0 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Sep 2022 • 56 Fuel-upsProperty of jasonellington
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16.8 Avg MPG
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2018 Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 ELECTRIC/GAS Automatic 6 Speed
Added Oct 2021 • 59 Fuel-upsProperty of gksills
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18.3 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
Added Mar 2022 • 95 Fuel-upsProperty of nvolz
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16.6 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
Added Nov 2022 • 18 Fuel-upsProperty of rosco1618
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18.2 Avg MPG
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Sierra 1500
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
Added Mar 2018 • 151 Fuel-upsProperty of lordsporkton
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14.8 Avg MPG
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My Sierra 1500
2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
Added Mar 2021 • 37 Fuel-upsProperty of DarkLordScott
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16.5 Avg MPG