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2018 GMC Sierra 2500 HD MPG

Based on data from 65 vehicles, 5,072 fuel-ups and 1,896,401 miles of driving, the 2018 GMC Sierra 2500 HD gets a combined Avg MPG of 14.47 with a 0.11 MPG margin of error.

Below you can see a distribution of the fuel-ups with 154 outliers (2.95%) removed.

Following shows the average MPG of each of the 65 vehicles in the system.

  • Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Feb 2025 • 123 Fuel-ups

    Property of pauldacar

  • 13.1 Avg MPG
  • Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Feb 2025 • 123 Fuel-ups

    Property of pauldnc

  • 13.1 Avg MPG
  • Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Feb 2025 • 123 Fuel-ups

    Property of pauldacar

  • 13.1 Avg MPG
  • Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Jan 2025 • 123 Fuel-ups

    Property of pauldacar

  • 13.1 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Feb 2020 • 72 Fuel-ups

    Property of yelruc2

  • 13.2 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Jun 2020 • 5 Fuel-ups

    Property of Madodds

  • 15.2 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Jul 2018 • 96 Fuel-ups

    Property of DocSavage1960

  • 12.9 Avg MPG
  • My Sierra

    2018 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed Crew Cab Pickup
    Added Jul 2018 • 36 Fuel-ups

    Property of Burple

  • 11.4 Avg MPG
  • 2018 GMC Sierra HD Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Oct 2017 • 73 Fuel-ups

    Property of klieber

  • 15.0 Avg MPG
  • Truck

    2018 GMC Sierra 2500 HD 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Apr 2019 • 37 Fuel-ups

    Property of Duckhunter

  • 16.4 Avg MPG
  • BlacKnight

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Nov 2018 • 41 Fuel-ups

    Property of jcmisze

  • 13.7 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed Extended Cab Pickup
    Added Feb 2019 • 61 Fuel-ups

    Property of jamesthebikeguy

  • 11.4 Avg MPG
  • Denali 2500HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Mar 2018 • 28 Fuel-ups

    Property of MitchM58

  • 17.1 Avg MPG
  • Sierra 2500 HD Ledcor

    2018 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
    Added Aug 2018 • 88 Fuel-ups

    Property of M_KWISE

  • 17.0 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Feb 2018 • 83 Fuel-ups

    Property of TheMekanik

  • 15.5 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Apr 2019 • 10 Fuel-ups

    Property of slecrew

  • 17.3 Avg MPG
  • My Denali HD

    2018 GMC Sierra 2500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
    Added Apr 2019 • 4 Fuel-ups

    Property of Renegades

  • 13.9 Avg MPG
  • Granite Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added May 2018 • 21 Fuel-ups

    Property of rjacobs

  • 16.5 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Jan 2018 • 51 Fuel-ups

    Property of Roadwarrior32

  • 14.8 Avg MPG
  • Gimmy Black™

    2018 GMC Sierra 2500 HD Denali 6.0L V8 FLEX Automatic 6 Speed Crew Cab Pickup
    Added Aug 2018 • 21 Fuel-ups

    Property of Abercrombies

  • 12.4 Avg MPG

Recent Activity

from other GMC Sierra 2500 HD vehicles (View All)

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