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2021 GMC Sierra 2500 HD MPG

Based on data from 71 vehicles, 4,443 fuel-ups and 1,431,549 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 (0.43%) removed.

Created with Highcharts 4.0.4Avg MPGNumber of Fuel-ups567891011121314151617181920212223050100150200250300350400450500550600

Following shows the average MPG of each of the 71 vehicles in the system.

Created with Highcharts 4.0.4Avg MPGNumber of Vehicles1011121314151617181968002468101214

2021 GMC Sierra 2500 HDs For Sale Nearby

  • AT4 Whore

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2021 • 162 Fuel-ups

    Property of pigpen23

  • 12.3 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 GAS Automatic 6 Speed
    Added May 2021 • 252 Fuel-ups

    Property of Buellx72

  • 11.2 Avg MPG
  • AT4

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Oct 2022 • 84 Fuel-ups

    Property of scrabble890

  • 14.3 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Sep 2023 • 180 Fuel-ups

    Property of SeB21

  • 17.0 Avg MPG
  • 2021

    2021 GMC Sierra 2500 HD Denali Crew Cab Pickup
    Added Dec 2020 • 203 Fuel-ups

    Property of lampmant

  • 13.0 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jul 2024 • 30 Fuel-ups

    Property of josterhout1

  • 15.4 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 6 Speed
    Added Nov 2024 • 16 Fuel-ups

    Property of Anticyclone

  • 11.3 Avg MPG
  • Dads Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Jan 2025 • 7 Fuel-ups

    Property of WillyM

  • 13.2 Avg MPG
  • 2021 Sierra 2500HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Jan 2024 • 59 Fuel-ups

    Property of Bost05

  • 12.6 Avg MPG
  • 2021 Sierra Denali HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2020 • 201 Fuel-ups

    Property of LynnE24

  • 14.3 Avg MPG
  • Big Bubba. My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2021 • 111 Fuel-ups

    Property of moose57

  • 16.6 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 10 Speed
    Added Oct 2021 • 165 Fuel-ups

    Property of bdamats

  • 11.1 Avg MPG
  • DENALI 2021

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Dec 2020 • 126 Fuel-ups

    Property of rivcoinc

  • 14.7 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Jan 2025 • 4 Fuel-ups

    Property of keenwyatt

  • 13.5 Avg MPG
  • Truck

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Nov 2024 • 4 Fuel-ups

    Property of MontanaRaptor

  • 17.2 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 GAS Automatic 6 Speed
    Added Aug 2021 • 57 Fuel-ups

    Property of drjim

  • 12.3 Avg MPG
  • 2021 Denali HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Nov 2020 • 99 Fuel-ups

    Property of DenaliDad

  • 14.7 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Jul 2024 • 9 Fuel-ups

    Property of jbhardman

  • 13.5 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2023 • 102 Fuel-ups

    Property of bcfiremedic

  • 12.0 Avg MPG
  • Sierra 2500 HD aka Sully

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2021 • 119 Fuel-ups

    Property of Ryot

  • 12.0 Avg MPG

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