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2021 GMC Sierra 2500 HD MPG

Based on data from 71 vehicles, 4,585 fuel-ups and 1,478,354 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 (0.41%) removed.

Created with Highcharts 4.0.4Avg MPGNumber of Fuel-ups567891011121314151617181920212223050100150200250300350400450500550600650

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

  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2020 • 113 Fuel-ups

    Property of mbrent77

  • 15.7 Avg MPG
  • 2500Hd GMC

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added May 2021 • 154 Fuel-ups

    Property of jmgolden1978

  • 14.0 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
    Added Apr 2023 • 253 Fuel-ups

    Property of mcgr0401

  • 13.1 Avg MPG
  • Dads Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Jan 2025 • 20 Fuel-ups

    Property of WillyM

  • 12.2 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 GAS Automatic 6 Speed
    Added May 2021 • 259 Fuel-ups

    Property of Buellx72

  • 11.3 Avg MPG
  • 2021

    2021 GMC Sierra 2500 HD Denali Crew Cab Pickup
    Added Dec 2020 • 206 Fuel-ups

    Property of lampmant

  • 13.0 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Jul 2024 • 17 Fuel-ups

    Property of jbhardman

  • 13.2 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2023 • 114 Fuel-ups

    Property of bcfiremedic

  • 11.9 Avg MPG
  • GMC

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jul 2024 • 16 Fuel-ups

    Property of JK27

  • 13.1 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 6 Speed
    Added Nov 2024 • 21 Fuel-ups

    Property of Anticyclone

  • 11.3 Avg MPG
  • 2021 Denali HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Nov 2020 • 103 Fuel-ups

    Property of DenaliDad

  • 14.7 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Sep 2023 • 189 Fuel-ups

    Property of SeB21

  • 17.1 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2023 • 27 Fuel-ups

    Property of egobuster1

  • 14.7 Avg MPG
  • AT4

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Oct 2022 • 86 Fuel-ups

    Property of scrabble890

  • 14.3 Avg MPG
  • 2021 Sierra Denali HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2020 • 213 Fuel-ups

    Property of LynnE24

  • 14.2 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
    Added Jan 2025 • 12 Fuel-ups

    Property of keenwyatt

  • 14.5 Avg MPG
  • My Sierra 2500 HD

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

    Property of kbeazley

  • 10.7 Avg MPG
  • 2021 Sierra 2500HD

    2021 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Jan 2024 • 70 Fuel-ups

    Property of Bost05

  • 12.5 Avg MPG
  • Sierra 2500 HD aka Sully

    2021 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2021 • 125 Fuel-ups

    Property of Ryot

  • 12.0 Avg MPG
  • My Sierra 2500 HD

    2021 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 10 Speed
    Added Oct 2021 • 171 Fuel-ups

    Property of bdamats

  • 11.2 Avg MPG

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