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2021 GMC Sierra 2500 HD MPG

Based on data from 57 vehicles, 2,432 fuel-ups and 768,010 miles of driving, the 2021 GMC Sierra 2500 HD gets a combined Avg MPG of 13.13 with a 0.15 MPG margin of error.

Below you can see a distribution of the fuel-ups with 9 outliers (0.37%) removed.

Following shows the average MPG of each of the 57 vehicles in the system.

2021 GMC Sierra 2500 HDs For Sale Nearby

  • Big Bubba. My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2021 • 60 Fuel-ups

    Property of moose57

  • 17.1 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
    Added Apr 2023 • 30 Fuel-ups

    Property of mcgr0401

  • 11.0 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 10 Speed
    Added Oct 2021 • 91 Fuel-ups

    Property of bdamats

  • 11.1 Avg MPG
  • BigTruck

    2021 GMC Sierra 2500 HD 6.6L V8 GAS Automatic 6 Speed Crew Cab Pickup
    Added Mar 2023 • 27 Fuel-ups

    Property of pmhanson

  • 14.6 Avg MPG
  • 2021 Sierra Denali HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Feb 2021 • 99 Fuel-ups

    Property of ccc2511

  • 16.0 Avg MPG
  • 2021 2500HD Denali

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Apr 2021 • 109 Fuel-ups

    Property of DP68

  • 17.1 Avg MPG
  • 2021 Denali HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Nov 2020 • 65 Fuel-ups

    Property of DenaliDad

  • 14.5 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 GAS Automatic 6 Speed
    Added May 2021 • 142 Fuel-ups

    Property of Buellx72

  • 11.5 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 GAS Automatic 6 Speed
    Added Nov 2021 • 75 Fuel-ups

    Property of Danm1228

  • 11.5 Avg MPG
  • DENALI 2021

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Dec 2020 • 72 Fuel-ups

    Property of rivcoinc

  • 14.2 Avg MPG
  • 2021 Sierra Denali HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2020 • 123 Fuel-ups

    Property of LynnE24

  • 14.6 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 10 Speed
    Added Jan 2023 • 34 Fuel-ups

    Property of Croybal06

  • 14.2 Avg MPG
  • AT4

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Oct 2022 • 40 Fuel-ups

    Property of scrabble890

  • 15.2 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 GAS Automatic 6 Speed
    Added Jun 2021 • 116 Fuel-ups

    Property of gregnola

  • 12.4 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLT 6.6L V8 GAS Automatic 6 Speed
    Added Jan 2021 • 26 Fuel-ups

    Property of NGreen08

  • 10.9 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2022 • 22 Fuel-ups

    Property of ryanhnicholson

  • 12.0 Avg MPG
  • 2021

    2021 GMC Sierra 2500 HD Denali Crew Cab Pickup
    Added Dec 2020 • 118 Fuel-ups

    Property of lampmant

  • 12.6 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2023 • 6 Fuel-ups

    Property of bcfiremedic

  • 13.0 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2021 • 91 Fuel-ups

    Property of xETERNALx

  • 13.5 Avg MPG
  • Sierra 2500 HD aka Sully

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2021 • 73 Fuel-ups

    Property of Ryot

  • 12.2 Avg MPG

Recent Activity

from other GMC Sierra 2500 HD vehicles (View All)

Tips

Consistent Refueling..don't top off your tank

Of course, to get good readings it is good to be consistent ... ...

by mtux96

Read more tips