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2020 GMC Sierra 3500 HD MPG

Based on data from 42 vehicles, 2,306 fuel-ups and 824,016 miles of driving, the 2020 GMC Sierra 3500 HD gets a combined Avg MPG of 13.25 with a 0.16 MPG margin of error.

Below you can see a distribution of the fuel-ups with 53 outliers (2.25%) removed.

Following shows the average MPG of each of the 42 vehicles in the system.

2020 GMC Sierra 3500 HDs For Sale Nearby

  • 2020 GMC 3500 HD

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2020 • 387 Fuel-ups

    Property of Gassy1976

  • 14.6 Avg MPG
  • My Sierra 3500 HD

    2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
    Added Jul 2024 • 13 Fuel-ups

    Property of maddess00

  • 17.6 Avg MPG
  • My Sierra 3500 HD

    2020 GMC Sierra 3500 HD Denali 6.6L V8 GAS Automatic 6 Speed
    Added Jul 2020 • 86 Fuel-ups

    Property of jdmich

  • 10.7 Avg MPG
  • My Sierra 3500 HD

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jan 2020 • 7 Fuel-ups

    Property of Alec55

  • 14.0 Avg MPG
  • My Sierra 3500 HD

    2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2020 • 148 Fuel-ups

    Property of ghurd

  • 14.3 Avg MPG
  • Star Lord vol. 2

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2021 • 40 Fuel-ups

    Property of rpar86

  • 11.2 Avg MPG
  • 2020 Sierra

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Jan 2023 • 105 Fuel-ups

    Property of brfs

  • 15.9 Avg MPG
  • My Sierra 3500 HD

    2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Jul 2020 • 183 Fuel-ups

    Property of abartlett

  • 15.4 Avg MPG
  • GMC Sierra 3500 HD

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2023 • 54 Fuel-ups

    Property of audiododd

  • 13.8 Avg MPG
  • Denali HD

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added May 2024 • 36 Fuel-ups

    Property of davijoh

  • 11.8 Avg MPG
  • 2020 3500 HD Denali

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2024 • 23 Fuel-ups

    Property of bobsearle

  • 13.8 Avg MPG
  • Denali 3500 HD

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2021 • 115 Fuel-ups

    Property of 2010RWCM

  • 13.6 Avg MPG
  • My Sierra 3500 HD

    2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2024 • 11 Fuel-ups

    Property of Ranger473

  • 13.0 Avg MPG
  • My Sierra 3500 HD

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2020 • 6 Fuel-ups

    Property of wedgie321

  • 10.7 Avg MPG
  • My Sierra 3500 HD Duramax

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2024 • 13 Fuel-ups

    Property of Bscherr

  • 8.4 Avg MPG
  • GMC

    2020 GMC Sierra 3500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Nov 2022 • 73 Fuel-ups

    Property of kitakidscomcastnet

  • 14.4 Avg MPG
  • GMC PlanetKiller

    2020 GMC Sierra 3500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Dec 2022 • 44 Fuel-ups

    Property of KyleMac

  • 14.2 Avg MPG
  • 2020 Def

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Apr 2023 • 14 Fuel-ups

    Property of brfs

  • 380.6 Avg MPG
  • Dee 3500 HD

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2020 • 283 Fuel-ups

    Property of deewhite

  • 12.9 Avg MPG
  • Damon’s Sierra 3500 HD Denali

    2020 GMC Sierra 3500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Feb 2020 • 293 Fuel-ups

    Property of Demon2JZ

  • 11.2 Avg MPG

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