Click here to see important news regarding the aCar App

2021 GMC Sierra 2500 HD MPG

Based on data from 74 vehicles, 4,825 fuel-ups and 1,559,633 miles of driving, the 2021 GMC Sierra 2500 HD gets a combined Avg MPG of 13.18 with a 0.11 MPG margin of error.

Below you can see a distribution of the fuel-ups with 19 outliers (0.39%) removed.

Following shows the average MPG of each of the 74 vehicles in the system.

2021 GMC Sierra 2500 HDs For Sale Nearby

  • 2021 Sierra 2500HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Jan 2024 • 78 Fuel-ups

    Property of Bost05

  • 12.6 Avg MPG
  • GMC

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jul 2024 • 26 Fuel-ups

    Property of JK27

  • 12.7 Avg MPG
  • AT4

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Oct 2022 • 91 Fuel-ups

    Property of scrabble890

  • 14.3 Avg MPG
  • AT4 Whore

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2021 • 176 Fuel-ups

    Property of pigpen23

  • 12.4 Avg MPG
  • GMC Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2023 • 45 Fuel-ups

    Property of Jdcompman

  • 15.9 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 10 Speed
    Added Oct 2021 • 182 Fuel-ups

    Property of bdamats

  • 11.1 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
    Added Apr 2023 • 273 Fuel-ups

    Property of mcgr0401

  • 13.1 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 GAS Automatic 6 Speed
    Added May 2021 • 272 Fuel-ups

    Property of Buellx72

  • 11.3 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2025 • 21 Fuel-ups

    Property of subie-doo

  • 12.9 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLT 6.6L V8 GAS Automatic 6 Speed
    Added Jan 2021 • 42 Fuel-ups

    Property of NGreen08

  • 10.3 Avg MPG
  • Dads Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Jan 2025 • 34 Fuel-ups

    Property of WillyM

  • 12.7 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Sep 2023 • 200 Fuel-ups

    Property of SeB21

  • 17.1 Avg MPG
  • 2021 Denali HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Nov 2020 • 109 Fuel-ups

    Property of DenaliDad

  • 14.8 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jul 2024 • 39 Fuel-ups

    Property of josterhout1

  • 15.6 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2023 • 129 Fuel-ups

    Property of bcfiremedic

  • 11.9 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2021 • 159 Fuel-ups

    Property of xETERNALx

  • 13.6 Avg MPG
  • 2021

    2021 GMC Sierra 2500 HD Denali Crew Cab Pickup
    Added Dec 2020 • 212 Fuel-ups

    Property of lampmant

  • 13.0 Avg MPG
  • Truck

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Nov 2024 • 19 Fuel-ups

    Property of MontanaRaptor

  • 15.5 Avg MPG
  • BigTruck

    2021 GMC Sierra 2500 HD 6.6L V8 GAS Automatic 6 Speed Crew Cab Pickup
    Added Mar 2023 • 68 Fuel-ups

    Property of pmhanson

  • 13.1 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2023 • 30 Fuel-ups

    Property of egobuster1

  • 14.6 Avg MPG

Recent Activity

from other GMC Sierra 2500 HD vehicles (View All)

Tips

Downhill Upshifting

When travelling down a hill you can upshift earlier as there... ...

by Cala

Read more tips