Click here to see important news regarding the aCar App

2021 GMC Sierra 3500 HD MPG

Based on data from 37 vehicles, 3,236 fuel-ups and 1,096,776 miles of driving, the 2021 GMC Sierra 3500 HD gets a combined Avg MPG of 13.89 with a 0.15 MPG margin of error.

Below you can see a distribution of the fuel-ups with 16 outliers (0.49%) removed.

Following shows the average MPG of each of the 37 vehicles in the system.

2021 GMC Sierra 3500 HDs For Sale Nearby

  • Adrian

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Aug 2022 • 150 Fuel-ups

    Property of stu1029

  • 15.5 Avg MPG
  • My Sierra 3500 HD

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2020 • 275 Fuel-ups

    Property of SeanAZ

  • 14.2 Avg MPG
  • My Sierra 3500 HD

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2020 • 126 Fuel-ups

    Property of ivandude44

  • 14.1 Avg MPG
  • AT4

    2021 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2021 • 140 Fuel-ups

    Property of jman3794

  • 11.0 Avg MPG
  • My Sierra 3500 HD

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2023 • 204 Fuel-ups

    Property of jillandduane

  • 12.4 Avg MPG
  • Sully

    2021 GMC Sierra 3500 HD AT4 6.6L V8 GAS Automatic 6 Speed
    Added Sep 2021 • 66 Fuel-ups

    Property of kstile

  • 12.9 Avg MPG
  • GMC

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Mar 2024 • 21 Fuel-ups

    Property of bvermilion

  • 12.9 Avg MPG
  • 2021 GMC Denali 3500HD

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Mar 2022 • 62 Fuel-ups

    Property of ob_1jr77

  • 12.9 Avg MPG
  • My Sierra 3500 HD

    2021 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2020 • 173 Fuel-ups

    Property of Packert

  • 13.6 Avg MPG
  • Sierra 3500 Dually

    2021 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2021 • 79 Fuel-ups

    Property of JoshMundy

  • 12.1 Avg MPG
  • 2021 GMC Sierra 3500 HD AT4

    2021 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2021 • 152 Fuel-ups

    Property of wbernards

  • 12.8 Avg MPG
  • Duramax

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2021 • 59 Fuel-ups

    Property of schroeder26

  • 12.5 Avg MPG
  • Georgia

    2021 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Jan 2024 • 51 Fuel-ups

    Property of cniehaus

  • 15.8 Avg MPG
  • My Sierra 3500 HD

    2021 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2022 • 116 Fuel-ups

    Property of hamiltbl2

  • 16.5 Avg MPG
  • 2021 GMC AT4 3500

    2021 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Crew Cab Pickup
    Added Nov 2020 • 143 Fuel-ups

    Property of jr32313

  • 14.7 Avg MPG
  • AT4

    2021 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Mar 2021 • 256 Fuel-ups

    Property of cowdoc

  • 18.6 Avg MPG
  • My Sierra 3500 HD

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2021 • 129 Fuel-ups

    Property of kmf620

  • 15.7 Avg MPG
  • 2021 Sierra 3500 HD

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Feb 2021 • 39 Fuel-ups

    Property of Flatchevy

  • 15.9 Avg MPG
  • Sierra 3500 HD

    2021 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2021 • 182 Fuel-ups

    Property of rdf1982

  • 12.3 Avg MPG
  • Thor

    2021 GMC Sierra 3500 HD SLE 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Nov 2021 • 197 Fuel-ups

    Property of jdnewman2021

  • 11.4 Avg MPG

Recent Activity

from other GMC Sierra 3500 HD vehicles (View All)

Tips

Keep your tank above the half mark

There are several advantages to keeping your tank above half... ...

by DTMAce

Read more tips