2015 GMC Sierra MPG
Based on data from 21 vehicles, 2,956 fuel-ups and 847,206 miles of driving, the 2015 GMC Sierra gets a combined Avg MPG of 16.58 with a 0.12 MPG margin of error.
Below you can see a distribution of the fuel-ups with 232 outliers (7.28%) removed.
Following shows the average MPG of each of the 21 vehicles in the system.
2015 GMC Sierras For Sale Nearby
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My Sierra
2015 GMC Sierra SLT 5.3L V8 FLEX Automatic 6 Speed
Added Aug 2023 • 77 Fuel-upsProperty of lsumilk
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18.1 Avg MPG
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My Sierra
2015 GMC Sierra All Terrain 5.3L V8 GAS Automatic 6 Speed
Added Oct 2019 • 210 Fuel-upsProperty of frekeyguy
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18.6 Avg MPG
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2015 GMC
2015 GMC Sierra SLE
Added Jan 2018 • 467 Fuel-upsProperty of Gimmy
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18.1 Avg MPG
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2015 GMC
2015 GMC Sierra SLE
Added Aug 2021 • 322 Fuel-upsProperty of octaneforever
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17.1 Avg MPG
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Moms New Wheels
2015 GMC Sierra 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
Added Oct 2015 • 439 Fuel-upsProperty of Momsweetride
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16.0 Avg MPG
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2015 GMC Sierra
2015 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
Added Aug 2016 • 36 Fuel-upsProperty of cheese7007
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12.5 Avg MPG
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GMC Black
2015 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
Added Aug 2016 • 180 Fuel-upsProperty of JoeShaker
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14.4 Avg MPG
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2015 Sierra SLT
2015 GMC Sierra SLT
Added Sep 2021 • 4 Fuel-upsProperty of gksills
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17.0 Avg MPG
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Truck
2015 GMC Sierra SLT
Added Mar 2018 • 199 Fuel-upsProperty of jabuck99
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17.4 Avg MPG
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Quick silver
2015 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
Added Mar 2017 • 202 Fuel-upsProperty of wrench
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18.9 Avg MPG
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GMC Sierra SLT
2015 GMC Sierra 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
Added Jul 2019 • 278 Fuel-upsProperty of ionsense
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18.1 Avg MPG
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New Truck
2015 GMC Sierra All Terrain 5.3L V8 GAS Automatic 6 Speed
Added Oct 2016 • 195 Fuel-upsProperty of navy0010
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15.5 Avg MPG
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GMC Sierra 2015
2015 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
Added May 2018 • 32 Fuel-upsProperty of Topman500
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13.1 Avg MPG
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Charity
2015 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
Added Mar 2017 • 110 Fuel-upsProperty of mkcollimsworth
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16.9 Avg MPG
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My Sierra
2015 GMC Sierra All Terrain 5.3L V8 GAS Automatic 6 Speed
Added May 2018 • 8 Fuel-upsProperty of mmhagen74
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19.5 Avg MPG
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Kent Campbell
2015 GMC Sierra Denali 6.2L V8 GAS Automatic 8 Speed
Added Mar 2017 • 244 Fuel-upsProperty of campbell1108
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11.2 Avg MPG
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2015 GMC
2015 GMC Sierra All Terrain 5.3L V8 GAS Automatic 6 Speed
Added Mar 2018 • 97 Fuel-upsProperty of cmac10
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18.1 Avg MPG
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Sierra
2015 GMC Sierra Mine
Added Mar 2017 • 60 Fuel-upsProperty of kiddjus
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15.0 Avg MPG
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Ian Fummerton
2015 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
Added Mar 2017 • 74 Fuel-upsProperty of fummy
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15.5 Avg MPG
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2015 GMC SIERRA
2015 GMC Sierra LT
Added Mar 2017 • 56 Fuel-upsProperty of jimmer2229
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14.9 Avg MPG