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2018 GMC Sierra 2500 HD MPG

Based on data from 50 vehicles, 2,636 fuel-ups and 1,060,008 miles of driving, the 2018 GMC Sierra 2500 HD gets a combined Avg MPG of 15.00 with a 0.14 MPG margin of error.

Below you can see a distribution of the fuel-ups with 35 outliers (1.31%) removed.

Following shows the average MPG of each of the 50 vehicles in the system.

  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added May 2018 • 123 Fuel-ups

    Property of jtw811

  • 14.6 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added May 2020 • 24 Fuel-ups

    Property of tishma09

  • 10.6 Avg MPG
  • 18 Sierra

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Jul 2018 • 139 Fuel-ups

    Property of texags06

  • 14.6 Avg MPG
  • GMC Sierra 2500 HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Jul 2018 • 166 Fuel-ups

    Property of LouLee

  • 15.6 Avg MPG
  • Ghost

    2018 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Apr 2018 • 195 Fuel-ups

    Property of cowdoc

  • 18.7 Avg MPG
  • Denali HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Jan 2018 • 56 Fuel-ups

    Property of Mavis500

  • 15.1 Avg MPG
  • Sierra 2500 HD

    2018 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed
    Added May 2019 • 54 Fuel-ups

    Property of larboy

  • 11.9 Avg MPG
  • Ken’s

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Apr 2020 • 19 Fuel-ups

    Property of Cave0369

  • 15.6 Avg MPG
  • 2018 Duramax

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Dec 2018 • 38 Fuel-ups

    Property of brbrb

  • 15.9 Avg MPG
  • My Sierra 2500 HD

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Nov 2018 • 60 Fuel-ups

    Property of cfort

  • 14.5 Avg MPG
  • Denali HD

    2018 GMC Sierra 2500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
    Added Jun 2020 • 23 Fuel-ups

    Property of Sullivan907

  • 13.8 Avg MPG
  • Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Dec 2017 • 143 Fuel-ups

    Property of jlawles2

  • 15.8 Avg MPG
  • Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Nov 2017 • 146 Fuel-ups

    Property of superflymtber

  • 17.5 Avg MPG
  • 2018 Sierra Denalli HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Jan 2018 • 110 Fuel-ups

    Property of LynnE24

  • 15.0 Avg MPG
  • My Denali

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
    Added Mar 2020 • 25 Fuel-ups

    Property of kmh54

  • 15.8 Avg MPG
  • Sierra Denali 2500 HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Mar 2019 • 56 Fuel-ups

    Property of west27

  • 13.7 Avg MPG
  • 2018 Duramax

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Extended Cab Pickup
    Added Nov 2017 • 51 Fuel-ups

    Property of Rocketrollinsx

  • 14.3 Avg MPG
  • 2018 Sierra Denali HD

    2018 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Jun 2018 • 115 Fuel-ups

    Property of xstaski

  • 15.2 Avg MPG
  • Sierra 2500

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Nov 2018 • 137 Fuel-ups

    Property of IPAGuy

  • 12.5 Avg MPG
  • Red Tank 15/40

    2018 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Feb 2018 • 39 Fuel-ups

    Property of jdelfin

  • 15.0 Avg MPG

Recent Activity

from other GMC Sierra 2500 HD vehicles (View All)

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What to watch out for

If a tanker truck is filling the fuel stations underground t... ...

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