Based on data from 133 vehicles, 5,491 fuel-ups and 2,118,397 miles of driving, the 2023 GMC Sierra 1500 gets a combined Avg MPG of 21.23 with a 0.16 MPG margin of error.

Any Engine Type 2.7L L4 GAS (5) 3.0L L6 DIESEL (78) 5.3L V8 GAS (15) 6.2L V8 GAS (18) Any Body Style Extended Cab Pickup (1) Crew Cab Pickup (29) Any Submodel Pro (1) SLE (2) AT4X (6) Denali Ultimate (8) SLT (19) Elevation (21) Denali (26) AT4 (50)

Below you can see a distribution of the fuel-ups with 50 outliers (0.90%) removed.

Following shows the average MPG of each of the 133 vehicles in the system.

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• Willow

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2023 • 95 Fuel-ups

  Property of buddyc48

• 21.2 Avg MPG

• AT4

  2023 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Aug 2023 • 101 Fuel-ups

  Property of Sicario8690

• 15.5 Avg MPG

• GMC Denali

  2023 GMC Sierra 1500 Denali
  Added Mar 2023 • 82 Fuel-ups

  Property of behler

• 18.9 Avg MPG

• 2023 Sierra 1500

  2023 GMC Sierra 1500 Pro 2.7L L4 GAS Automatic 8 Speed
  Added May 2024 • 7 Fuel-ups

  Property of cacf999

• 19.3 Avg MPG

• GMC Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jun 2024 • 24 Fuel-ups

  Property of Billy22

• 18.9 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Jun 2024 • 23 Fuel-ups

  Property of Lanlo65

• 26.3 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 10 Speed
  Added Oct 2023 • 29 Fuel-ups

  Property of mstagner

• 15.1 Avg MPG

• Sierra 1500 AT4

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 54 Fuel-ups

  Property of bmudd89

• 22.6 Avg MPG

• 2023 GMC Sierra 1500 AT4

  2023 GMC Sierra 1500 AT4
  Added Dec 2022 • 69 Fuel-ups

  Property of ndorval

• 21.7 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2024 • 18 Fuel-ups

  Property of Btucker6

• 21.8 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2023 • 68 Fuel-ups

  Property of myat4

• 21.4 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Oct 2023 • 56 Fuel-ups

  Property of Harvey8125

• 24.5 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
  Added Jun 2023 • 47 Fuel-ups

  Property of gmuick

• 15.2 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2023 • 43 Fuel-ups

  Property of Fubar247

• 22.9 Avg MPG

• Denali

  2023 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 38 Fuel-ups

  Property of mysticpeanut

• 17.4 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4
  Added Mar 2023 • 60 Fuel-ups

  Property of tdclapp88

• 23.0 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4X 6.2L V8 GAS Automatic 10 Speed
  Added Apr 2024 • 27 Fuel-ups

  Property of m_inkley

• 16.5 Avg MPG

• Sierra

  2023 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Nov 2024 • 4 Fuel-ups

  Property of toddtj

• 15.2 Avg MPG

• My Sierra 1500 Again

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 30 Fuel-ups

  Property of shiftracer247

• 26.3 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Oct 2023 • 25 Fuel-ups

  Property of Fuzzy-69

• 24.3 Avg MPG

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