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2021 GMC Sierra 1500 MPG

Based on data from 249 vehicles, 17,741 fuel-ups and 6,767,940 miles of driving, the 2021 GMC Sierra 1500 gets a combined Avg MPG of 20.33 with a 0.08 MPG margin of error.

Below you can see a distribution of the fuel-ups with 92 outliers (0.52%) removed.

Following shows the average MPG of each of the 249 vehicles in the system.

2021 GMC Sierra 1500s For Sale Nearby

  • My Sierra 1500

    2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
    Added May 2023 • 44 Fuel-ups

    Property of Griffis89

  • 20.6 Avg MPG
  • CarbonPro GMC

    2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Mar 2022 • 104 Fuel-ups

    Property of sefowler

  • 24.6 Avg MPG
  • GMC

    2021 GMC Sierra 1500 SLT
    Added Jan 2023 • 120 Fuel-ups

    Property of builder604

  • 16.5 Avg MPG
  • White Walker

    2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
    Added Jun 2023 • 72 Fuel-ups

    Property of imca35

  • 22.2 Avg MPG
  • Elevation

    2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Jun 2022 • 57 Fuel-ups

    Property of hollywood703

  • 23.1 Avg MPG
  • My Sierra 1500

    2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
    Added Sep 2021 • 147 Fuel-ups

    Property of rs4mtnitro

  • 22.2 Avg MPG
  • My Sierra 1500

    2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
    Added Jul 2021 • 225 Fuel-ups

    Property of AT4-GLI

  • 23.4 Avg MPG
  • My Sierra 1500

    2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
    Added Sep 2021 • 185 Fuel-ups

    Property of Biggs2021

  • 26.1 Avg MPG
  • Sasha 2

    2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic Crew Cab Pickup
    Added Apr 2021 • 144 Fuel-ups

    Property of fides893

  • 18.7 Avg MPG
  • 2021 GMC Sierra

    2021 GMC Sierra 1500 SLE 5.3L V8 GAS Crew Cab Pickup
    Added Mar 2024 • 44 Fuel-ups

    Property of Roy2Chin

  • 18.9 Avg MPG
  • My Sierra 1500

    2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added Aug 2021 • 155 Fuel-ups

    Property of 76109

  • 19.0 Avg MPG
  • Brown D

    2021 GMC Sierra 1500 SLE 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added May 2021 • 114 Fuel-ups

    Property of sc402443

  • 24.3 Avg MPG
  • GMC Sierra

    2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Jul 2024 • 23 Fuel-ups

    Property of steven289

  • 26.2 Avg MPG
  • My Sierra 1500

    2021 GMC Sierra 1500 SLE 2.7L L4 GAS Automatic 8 Speed
    Added Jun 2022 • 121 Fuel-ups

    Property of jctoss32986

  • 14.0 Avg MPG
  • Lil White

    2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added Apr 2024 • 31 Fuel-ups

    Property of zogeil

  • 20.0 Avg MPG
  • My Sierra 1500 AT4

    2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
    Added Jan 2021 • 147 Fuel-ups

    Property of sfwalters

  • 18.8 Avg MPG
  • GMC

    2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Extended Cab Pickup
    Added Jan 2022 • 60 Fuel-ups

    Property of johnny91750

  • 25.9 Avg MPG
  • Sierra

    2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
    Added May 2021 • 64 Fuel-ups

    Property of Adam2kSS

  • 22.0 Avg MPG
  • My Sierra 1500

    2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed
    Added Jan 2024 • 43 Fuel-ups

    Property of KGermany97

  • 17.4 Avg MPG
  • My Sierra 1500

    2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added Aug 2024 • 13 Fuel-ups

    Property of dillpill88

  • 16.6 Avg MPG

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