Based on data from 140 vehicles, 6,115 fuel-ups and 2,344,521 miles of driving, the 2023 GMC Sierra 1500 gets a combined Avg MPG of 21.13 with a 0.15 MPG margin of error.

Any Engine Type 2.7L L4 GAS (5) 3.0L L6 DIESEL (81) 5.3L V8 GAS (17) 6.2L V8 GAS (20) Any Body Style Extended Cab Pickup (1) Crew Cab Pickup (34) Any Submodel Pro (1) SLE (2) AT4X (7) Denali Ultimate (8) SLT (19) Elevation (21) Denali (30) AT4 (52)

Below you can see a distribution of the fuel-ups with 63 outliers (1.02%) removed.

Following shows the average MPG of each of the 140 vehicles in the system.

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• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2024 • 13 Fuel-ups

  Property of rskeefer

• 20.8 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Oct 2023 • 67 Fuel-ups

  Property of Harvey8125

• 24.4 Avg MPG

• AT4x

  2023 GMC Sierra 1500 AT4X 6.2L V8 GAS Automatic 10 Speed
  Added Dec 2024 • 22 Fuel-ups

  Property of sklineman

• 14.0 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali Ultimate 3.0L L6 DIESEL Automatic 10 Speed
  Added Oct 2023 • 66 Fuel-ups

  Property of Rigid883

• 21.0 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Feb 2023 • 187 Fuel-ups

  Property of alm3287

• 26.3 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed
  Added Jun 2023 • 197 Fuel-ups

  Property of artmax480

• 19.6 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Apr 2024 • 48 Fuel-ups

  Property of petereic

• 23.4 Avg MPG

• Phil's GMC

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jan 2025 • 8 Fuel-ups

  Property of pwo

• 23.1 Avg MPG

• 2023 Sierra

  2023 GMC Sierra 1500 Denali Ultimate 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Dec 2023 • 75 Fuel-ups

  Property of ottozone

• 25.3 Avg MPG

• JJ’s Jimmy 1500

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed
  Added Aug 2023 • 46 Fuel-ups

  Property of TKPjwlr

• 13.5 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Apr 2024 • 61 Fuel-ups

  Property of JFerenczi

• 27.0 Avg MPG

• Da Sierra 1500

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2023 • 81 Fuel-ups

  Property of tadder52

• 21.6 Avg MPG

• 2023 GMC Sierra 1500 SLT

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Jan 2024 • 36 Fuel-ups

  Property of blalk

• 21.0 Avg MPG

• Presious 2.0

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2023 • 70 Fuel-ups

  Property of njaybong

• 23.6 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Apr 2024 • 90 Fuel-ups

  Property of codymast

• 25.6 Avg MPG

• My Sierra 1500 mini max

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 60 Fuel-ups

  Property of jimmyag

• 29.6 Avg MPG

• AT4

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jan 2024 • 74 Fuel-ups

  Property of Schilling

• 23.5 Avg MPG

• Squeegee Slinging Mobile

  2023 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Jul 2024 • 46 Fuel-ups

  Property of mmstone24

• 16.2 Avg MPG

• Jonathon’s GMC

  2023 GMC Sierra 1500 Elevation
  Added Jan 2023 • 112 Fuel-ups

  Property of luc_sko

• 26.4 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2024 • 22 Fuel-ups

  Property of eswanson

• 25.1 Avg MPG

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