Based on data from 252 vehicles, 18,269 fuel-ups and 6,986,591 miles of driving, the 2021 GMC Sierra 1500 gets a combined Avg MPG of 20.37 with a 0.08 MPG margin of error.

Any Engine Type 2.7L L4 GAS (10) 3.0L L6 DIESEL (161) 5.3L V8 GAS (52) 6.2L V8 GAS (28) Any Body Style Extended Cab Pickup (6) Crew Cab Pickup (62) Cab & Chassis - Crew Cab (3) Any Submodel SLE (10) SLT (37) Denali (42) Elevation (61) AT4 (102)

Below you can see a distribution of the fuel-ups with 94 outliers (0.51%) removed.

Following shows the average MPG of each of the 252 vehicles in the system.

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

• My Sierra 1500

  2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2021 • 190 Fuel-ups

  Property of jwarner77

• 24.0 Avg MPG

• Family Hauler

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Dec 2021 • 83 Fuel-ups

  Property of 2013RAM2500

• 23.6 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2021 • 69 Fuel-ups

  Property of jcg2009

• 22.1 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 SLE 2.7L L4 GAS Automatic 8 Speed
  Added Jun 2022 • 125 Fuel-ups

  Property of jctoss32986

• 14.0 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
  Added Jul 2023 • 68 Fuel-ups

  Property of snoogans7031

• 17.3 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2021 • 149 Fuel-ups

  Property of rs4mtnitro

• 22.2 Avg MPG

• 2021 Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2022 • 102 Fuel-ups

  Property of milcher

• 21.2 Avg MPG

• AT4

  2021 GMC Sierra 1500 AT4 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Sep 2023 • 94 Fuel-ups

  Property of rockopolster

• 17.1 Avg MPG

• White Walker

  2021 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Jun 2023 • 75 Fuel-ups

  Property of imca35

• 22.1 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added Aug 2021 • 159 Fuel-ups

  Property of 76109

• 19.0 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed
  Added Aug 2021 • 117 Fuel-ups

  Property of johnoutdoors

• 21.7 Avg MPG

• Big Red

  2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jun 2021 • 116 Fuel-ups

  Property of 53Stang

• 24.3 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Dec 2020 • 121 Fuel-ups

  Property of travreed22

• 23.3 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Feb 2023 • 69 Fuel-ups

  Property of dudecker

• 25.9 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 SLE 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2021 • 96 Fuel-ups

  Property of Istijour

• 24.0 Avg MPG

• Sierra 1500 Elavation

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Oct 2022 • 75 Fuel-ups

  Property of lj1064

• 25.2 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Dec 2021 • 226 Fuel-ups

  Property of MoeD

• 24.1 Avg MPG

• Denali

  2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Aug 2021 • 145 Fuel-ups

  Property of wingaterk

• 17.7 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Mar 2021 • 258 Fuel-ups

  Property of ryank880

• 21.5 Avg MPG

• Reba

  2021 GMC Sierra 1500 AT4 5.3L V8 GAS Automatic 10 Speed
  Added Mar 2021 • 186 Fuel-ups

  Property of voodoochild24

• 16.5 Avg MPG

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