2018 GMC Sierra 3500 HD MPG
Based on data from 28 vehicles, 2,281 fuel-ups and 730,620 miles of driving, the 2018 GMC Sierra 3500 HD gets a combined Avg MPG of 12.14 with a 0.16 MPG margin of error.
Below you can see a distribution of the fuel-ups with 14 outliers (0.61%) removed.
Following shows the average MPG of each of the 28 vehicles in the system.
2018 GMC Sierra 3500 HDs For Sale Nearby
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Tow Pig
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Aug 2018 • 312 Fuel-upsProperty of Robicus
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13.3 Avg MPG
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GMC
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
Added Aug 2023 • 75 Fuel-upsProperty of hikyuuri
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14.6 Avg MPG
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Great White L5P
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
Added Sep 2018 • 88 Fuel-upsProperty of 2manyliters
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14.0 Avg MPG
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Sierra
2018 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
Added Jan 2025 • 454 Fuel-upsProperty of artman1913
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11.6 Avg MPG
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Big Elmo
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
Added Jan 2018 • 159 Fuel-upsProperty of Geodude
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10.8 Avg MPG
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My Sierra 3500 HD
2018 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
Added Sep 2024 • 4 Fuel-upsProperty of SierraBob
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11.6 Avg MPG
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DEF
2018 GMC Sierra 3500 HD SLT Automatic 6 Speed
Added Jan 2025 • 46 Fuel-upsProperty of artman1913
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512.5 Avg MPG
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GMC 3500
2018 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
Added Dec 2017 • 72 Fuel-upsProperty of Peterbuilt75
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10.9 Avg MPG
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Sierra 3500 HD
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Nov 2017 • 179 Fuel-upsProperty of jamesnkerr
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14.0 Avg MPG
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My Sierra 3500 HD
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Feb 2021 • 184 Fuel-upsProperty of codycourtney2
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13.7 Avg MPG
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My Sierra 3500 HD
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Mar 2024 • 3 Fuel-upsProperty of zachjohnson0726
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15.5 Avg MPG
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2018 GMC Sierra 3500HD
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
Added Aug 2019 • 166 Fuel-upsProperty of pputney
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11.8 Avg MPG
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Denali
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Jun 2018 • 125 Fuel-upsProperty of suasman
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14.1 Avg MPG
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Pick Up
2018 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
Added Nov 2022 • 4 Fuel-upsProperty of petestoy
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14.2 Avg MPG
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GMC Sierra 3500 HD
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Sep 2017 • 90 Fuel-upsProperty of amtrak8
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13.1 Avg MPG
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My Sierra 3500 HD
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Jul 2020 • 127 Fuel-upsProperty of tortuga99
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10.9 Avg MPG
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Sierra 3500 HD RV Hauler
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Mar 2020 • 109 Fuel-upsProperty of Derril
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11.9 Avg MPG
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My Sierra 3500 HD
2018 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
Added Sep 2018 • 155 Fuel-upsProperty of brizgislawrencej
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13.0 Avg MPG
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CB Denali
2018 GMC Sierra 3500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
Added Jul 2019 • 11 Fuel-upsProperty of KTBHDH
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9.2 Avg MPG
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My Sierra 3500 HD
2018 GMC Sierra 3500 HD 6.6L V8 DIESEL Automatic 6 Speed
Added Jul 2018 • 47 Fuel-upsProperty of skinnertonoutlaw
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8.7 Avg MPG