Based on data from 242 vehicles, 16,496 fuel-ups and 6,258,881 miles of driving, the 2021 GMC Sierra 1500 gets a combined Avg MPG of 20.27 with a 0.09 MPG margin of error.

Any Engine Type 2.7L L4 GAS (10) 3.0L L6 DIESEL (158) 5.3L V8 GAS (46) 6.2L V8 GAS (27) Any Body Style Extended Cab Pickup (6) Crew Cab Pickup (60) Cab & Chassis - Crew Cab (3) Any Submodel SLE (9) SLT (35) Denali (43) Elevation (60) AT4 (95)

Below you can see a distribution of the fuel-ups with 89 outliers (0.54%) removed.

Following shows the average MPG of each of the 242 vehicles in the system.

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• ...
• 12
• 13
• »

• 2021 GMC Sierra Diesel

  2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Apr 2021 • 85 Fuel-ups

  Property of dsc0814

• 23.1 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2021 • 217 Fuel-ups

  Property of Luddy

• 26.4 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
  Added Jul 2023 • 44 Fuel-ups

  Property of snoogans7031

• 16.8 Avg MPG

• Lucille

  2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
  Added Oct 2023 • 34 Fuel-ups

  Property of kwhight

• 18.1 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed
  Added Aug 2021 • 91 Fuel-ups

  Property of johnoutdoors

• 21.5 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed
  Added Jul 2024 • 228 Fuel-ups

  Property of Rockn

• 16.1 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Feb 2024 • 40 Fuel-ups

  Property of BigBoostDSM

• 15.9 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added Apr 2023 • 28 Fuel-ups

  Property of sharkyp14

• 16.1 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2021 • 172 Fuel-ups

  Property of Biggs2021

• 26.1 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed
  Added Jan 2024 • 22 Fuel-ups

  Property of KGermany97

• 16.9 Avg MPG

• Denali

  2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Aug 2021 • 120 Fuel-ups

  Property of wingaterk

• 17.8 Avg MPG

• AT4

  2021 GMC Sierra 1500 AT4 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Sep 2023 • 71 Fuel-ups

  Property of rockopolster

• 17.0 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2021 • 65 Fuel-ups

  Property of CJ_KC

• 25.4 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Nov 2021 • 61 Fuel-ups

  Property of steamroller69633

• 15.5 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2021 • 254 Fuel-ups

  Property of Silverflash22

• 22.5 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Oct 2023 • 98 Fuel-ups

  Property of gdmannjr

• 16.3 Avg MPG

• 2021 Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2022 • 86 Fuel-ups

  Property of milcher

• 20.9 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Dec 2021 • 195 Fuel-ups

  Property of MoeD

• 24.2 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2021 • 128 Fuel-ups

  Property of rs4mtnitro

• 22.0 Avg MPG

• Yodha

  2021 GMC Sierra 1500 SLE 2.7L L4 GAS Automatic 8 Speed Extended Cab Pickup
  Added Oct 2021 • 146 Fuel-ups

  Property of YODHA

• 22.4 Avg MPG

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• ...
• 12
• 13
• »