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2020 GMC Sierra 2500 HD MPG

Based on data from 48 vehicles, 3,251 fuel-ups and 1,198,955 miles of driving, the 2020 GMC Sierra 2500 HD gets a combined Avg MPG of 14.26 with a 0.12 MPG margin of error.

Below you can see a distribution of the fuel-ups with 29 outliers (0.88%) removed.

Following shows the average MPG of each of the 48 vehicles in the system.

2020 GMC Sierra 2500 HDs For Sale Nearby

  • No Greater Love

    2020 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Nov 2021 • 18 Fuel-ups

    Property of mattjames11

  • 12.3 Avg MPG
  • L5P

    2020 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2021 • 50 Fuel-ups

    Property of jwmontoya

  • 14.2 Avg MPG
  • ‘Nali

    2020 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Jul 2023 • 40 Fuel-ups

    Property of raulserrano

  • 17.7 Avg MPG
  • My Sierra 2500 HD

    2020 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Sep 2020 • 151 Fuel-ups

    Property of Xaositek

  • 16.2 Avg MPG
  • Duramax

    2020 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added May 2021 • 97 Fuel-ups

    Property of Silentfun65

  • 14.5 Avg MPG
  • My Sierra 2500 HD

    2020 GMC Sierra 2500 HD SLE 6.6L V8 GAS Automatic 6 Speed
    Added May 2020 • 68 Fuel-ups

    Property of uncledot

  • 13.3 Avg MPG
  • My Sierra 2500 HD

    2020 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Jan 2021 • 117 Fuel-ups

    Property of DMaxTRR

  • 15.9 Avg MPG
  • My Sierra 2500 HD

    2020 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Jan 2022 • 146 Fuel-ups

    Property of BPowAT4HD

  • 16.5 Avg MPG
  • Sierra

    2020 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Jan 2023 • 22 Fuel-ups

    Property of bradford29

  • 17.3 Avg MPG
  • FLWKS 2500HD AT4

    2020 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Jun 2020 • 104 Fuel-ups

    Property of hockeyvillian

  • 14.5 Avg MPG
  • BatMobile II

    2020 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2020 • 155 Fuel-ups

    Property of Rocinante1

  • 16.0 Avg MPG
  • Big Red II

    2020 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Aug 2020 • 150 Fuel-ups

    Property of TackleBox

  • 13.6 Avg MPG
  • My Sierra 2500 HD

    2020 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2023 • 24 Fuel-ups

    Property of aricb23

  • 10.9 Avg MPG
  • Red

    2020 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
    Added Mar 2020 • 135 Fuel-ups

    Property of llljrmd

  • 16.5 Avg MPG
  • Blue Beast

    2020 GMC Sierra 2500 HD SLT 6.6L V8 GAS Automatic 6 Speed Extended Cab Pickup
    Added Sep 2020 • 46 Fuel-ups

    Property of JustinID

  • 13.5 Avg MPG
  • GMC AT4

    2020 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Nov 2021 • 38 Fuel-ups

    Property of gil_bradshaw

  • 15.6 Avg MPG
  • 2020 AT4 2500HD

    2020 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
    Added Apr 2022 • 21 Fuel-ups

    Property of rab986

  • 16.8 Avg MPG
  • Sierra 2500HD Duramax

    2020 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Aug 2020 • 61 Fuel-ups

    Property of RamMan88

  • 16.0 Avg MPG
  • Denali 2500HD

    2020 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Nov 2020 • 29 Fuel-ups

    Property of eastcoasthd

  • 14.2 Avg MPG
  • FURY

    2020 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
    Added Sep 2020 • 28 Fuel-ups

    Property of Thumpy

  • 14.3 Avg MPG

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