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2018 GMC Sierra 1500 MPG

Based on data from 194 vehicles, 19,130 fuel-ups and 5,404,535 miles of driving, the 2018 GMC Sierra 1500 gets a combined Avg MPG of 15.94 with a 0.05 MPG margin of error.

Below you can see a distribution of the fuel-ups with 272 outliers (1.40%) removed.

Following shows the average MPG of each of the 194 vehicles in the system.

2018 GMC Sierra 1500s For Sale Nearby

  • My Sierra 1500

    2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
    Added Jun 2025 • 10 Fuel-ups

    Property of bkiefat918

  • 13.6 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added Oct 2019 • 423 Fuel-ups

    Property of iNative

  • 16.1 Avg MPG
  • Big Red Eskimo

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
    Added Nov 2021 • 320 Fuel-ups

    Property of rkfdwc1

  • 15.6 Avg MPG
  • Denali

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
    Added Jun 2024 • 74 Fuel-ups

    Property of Jathroo

  • 17.1 Avg MPG
  • 2018 GMC Sierra Denali 4x4

    2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Jun 2018 • 294 Fuel-ups

    Property of mpg01

  • 17.1 Avg MPG
  • Vador

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Apr 2024 • 84 Fuel-ups

    Property of drink2006

  • 18.2 Avg MPG
  • Jimmy

    2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Jan 2018 • 249 Fuel-ups

    Property of cowpen

  • 19.0 Avg MPG
  • GMC Denali

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
    Added Oct 2022 • 76 Fuel-ups

    Property of ArtieBar64

  • 16.4 Avg MPG
  • Truck

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added May 2018 • 193 Fuel-ups

    Property of DrAwesome

  • 16.3 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
    Added Jan 2024 • 143 Fuel-ups

    Property of Mr-GreenToCleanPools

  • 17.5 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 8 Speed
    Added Aug 2023 • 26 Fuel-ups

    Property of MaxBurn

  • 12.6 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed
    Added Mar 2018 • 275 Fuel-ups

    Property of chilly0999

  • 16.7 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
    Added May 2024 • 129 Fuel-ups

    Property of Zebby76

  • 16.4 Avg MPG
  • Sierra

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
    Added Jun 2018 • 143 Fuel-ups

    Property of JDubz313

  • 15.5 Avg MPG
  • 2018 GMC Sierra

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
    Added Apr 2022 • 185 Fuel-ups

    Property of rtsteen

  • 17.7 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
    Added Dec 2021 • 216 Fuel-ups

    Property of riggity27

  • 14.8 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
    Added Feb 2024 • 89 Fuel-ups

    Property of BowManGuardian

  • 14.9 Avg MPG
  • Sierra

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
    Added Apr 2019 • 483 Fuel-ups

    Property of CAHayes1109

  • 14.0 Avg MPG
  • GMC Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added Jun 2018 • 412 Fuel-ups

    Property of Buckshot48

  • 17.9 Avg MPG
  • Denali

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Jan 2018 • 402 Fuel-ups

    Property of Godofwine7

  • 15.9 Avg MPG

Recent Activity

from other GMC Sierra 1500 vehicles (View All)

Tips

Take the inside

If your on a two lane road with low or zero traffic take the... ...

by Sunrisefox

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