Based on data from 247 vehicles, 17,258 fuel-ups and 6,573,547 miles of driving, the 2021 GMC Sierra 1500 gets a combined Avg MPG of 20.32 with a 0.09 MPG margin of error.

Any Engine Type 2.7L L4 GAS (10) 3.0L L6 DIESEL (159) 5.3L V8 GAS (49) 6.2L V8 GAS (28) Any Body Style Extended Cab Pickup (6) Crew Cab Pickup (61) Cab & Chassis - Crew Cab (3) Any Submodel SLE (10) SLT (36) Denali (43) Elevation (60) AT4 (98)

Below you can see a distribution of the fuel-ups with 93 outliers (0.54%) removed.

Following shows the average MPG of each of the 247 vehicles in the system.

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

• GMC

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Extended Cab Pickup
  Added Jan 2022 • 58 Fuel-ups

  Property of johnny91750

• 26.0 Avg MPG

• Sasha 2

  2021 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic Crew Cab Pickup
  Added Apr 2021 • 137 Fuel-ups

  Property of fides893

• 18.9 Avg MPG

• Denali

  2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Aug 2021 • 134 Fuel-ups

  Property of wingaterk

• 17.9 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2021 • 217 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 Jul 2021 • 232 Fuel-ups

  Property of Luddy

• 26.4 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Jun 2021 • 122 Fuel-ups

  Property of sooner2016

• 25.2 Avg MPG

• 2021 GMC Sierra SLT 1500 4WD

  2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 31 Fuel-ups

  Property of blrains706

• 23.9 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added Aug 2021 • 149 Fuel-ups

  Property of 76109

• 19.0 Avg MPG

• My GMC Sierra 1500

  2021 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Nov 2021 • 91 Fuel-ups

  Property of ndodge3

• 27.1 Avg MPG

• Grey Ghost

  2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
  Added Feb 2021 • 134 Fuel-ups

  Property of Britbeamer

• 19.6 Avg MPG

• 2021 GMC Sierra AT4

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Feb 2021 • 195 Fuel-ups

  Property of JasperAutos

• 21.2 Avg MPG

• 2021 GMC Sierra 1500

  2021 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added Jun 2021 • 82 Fuel-ups

  Property of mdsavoy

• 17.6 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Dec 2021 • 55 Fuel-ups

  Property of jps4di

• 23.6 Avg MPG

• Brown D

  2021 GMC Sierra 1500 SLE 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added May 2021 • 109 Fuel-ups

  Property of sc402443

• 24.3 Avg MPG

• 2021 Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Mar 2021 • 196 Fuel-ups

  Property of MWC_64

• 23.0 Avg MPG

• 2021 GMC Sierra

  2021 GMC Sierra 1500 SLE 5.3L V8 GAS Crew Cab Pickup
  Added Mar 2024 • 37 Fuel-ups

  Property of Roy2Chin

• 19.0 Avg MPG

• Big White Truck

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Dec 2020 • 64 Fuel-ups

  Property of eckseleven

• 19.6 Avg MPG

• Night Train

  2021 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed
  Added Aug 2021 • 350 Fuel-ups

  Property of jbab2004

• 19.5 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Feb 2024 • 57 Fuel-ups

  Property of BigBoostDSM

• 15.2 Avg MPG

• My Sierra 1500

  2021 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2021 • 70 Fuel-ups

  Property of CJ_KC

• 25.3 Avg MPG

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