2018 GMC Sierra 1500 MPG

Based on data from 186 vehicles, 16,505 fuel-ups and 4,660,203 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 239 outliers (1.43%) removed.

Following shows the average MPG of each of the 186 vehicles in the system.

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• My Sierra 1500

  2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
  Added Jan 2018 • 27 Fuel-ups

  Property of brettsinyard

• 14.0 Avg MPG

• BKMX120

  2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Jan 2018 • 13 Fuel-ups

  Property of bkeating

• 15.9 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 8 Speed
  Added Mar 2018 • 5 Fuel-ups

  Property of hornedfrog05

• 18.5 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Feb 2018 • 3 Fuel-ups

  Property of dail0054

• 11.6 Avg MPG

• Sierra

  2018 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2021 • 122 Fuel-ups

  Property of Bigtrucker53

• 17.4 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Oct 2017 • 5 Fuel-ups

  Property of cburley

• 16.9 Avg MPG

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