Based on data from 17 vehicles, 525 fuel-ups and 185,030 miles of driving, the 2023 GMC Yukon XL gets a combined Avg MPG of 18.95 with a 0.41 MPG margin of error.

Any Engine Type 3.0L L6 DIESEL (10) 5.3L V8 GAS (2) 6.2L V8 GAS (5) Any Body Style Sport Utility (3) Any Submodel SLE (1) AT4 (3) Denali Ultimate (3) SLT (4) Denali (6)

Below you can see a distribution of the fuel-ups with 3 outliers (0.57%) removed.

Following shows the average MPG of each of the 17 vehicles in the system.

• My Yukon XL

  2023 GMC Yukon XL Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 132 Fuel-ups

  Property of futureal

• 23.0 Avg MPG

• Black Rose

  2023 GMC Yukon XL SLT 5.3L V8 GAS Automatic 10 Speed Sport Utility
  Added Sep 2022 • 121 Fuel-ups

  Property of Rolls

• 18.6 Avg MPG

• Yukon XL

  2023 GMC Yukon XL AT4 6.2L V8 GAS Automatic 10 Speed
  Added Jul 2023 • 66 Fuel-ups

  Property of sbochat

• 15.6 Avg MPG

• 2023 Denali Yukon XL

  2023 GMC Yukon XL Denali 6.2L V8 GAS Automatic 10 Speed
  Added Oct 2023 • 37 Fuel-ups

  Property of mike6681

• 15.8 Avg MPG

• Cam’s Denali

  2023 GMC Yukon XL Denali 6.2L V8 GAS Automatic 10 Speed
  Added Jun 2023 • 54 Fuel-ups

  Property of mrbigwake

• 15.2 Avg MPG

• My Yukon XL

  2023 GMC Yukon XL SLE 3.0L L6 DIESEL Automatic 10 Speed
  Added Jan 2024 • 10 Fuel-ups

  Property of reillyfam

• 23.2 Avg MPG

• My Yukon XL

  2023 GMC Yukon XL SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 5 Fuel-ups

  Property of Ki-Ki

• 46.5 Avg MPG

• Bradley Jherome

  2023 GMC Yukon XL Denali Ultimate 3.0L L6 DIESEL Automatic 10 Speed
  Added Mar 2024 • 11 Fuel-ups

  Property of LIVHUGE

• 21.2 Avg MPG

• The Beast

  2023 GMC Yukon XL SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 44 Fuel-ups

  Property of scrubs

• 22.3 Avg MPG

• GMC Yukon XL

  2023 GMC Yukon XL AT4 6.2L V8 GAS Automatic 10 Speed
  Added Mar 2024 • 5 Fuel-ups

  Property of mmilano

• 15.0 Avg MPG

• Kevin's Denali Diesel

  2023 GMC Yukon XL Denali Ultimate 3.0L L6 DIESEL Automatic 10 Speed Sport Utility
  Added Sep 2023 • 17 Fuel-ups

  Property of Xplmr

• 21.5 Avg MPG

• 2023 Yukon XL Denali

  2023 GMC Yukon XL Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Jan 2024 • 5 Fuel-ups

  Property of Teck

• 21.1 Avg MPG

• Yukon AT4

  2023 GMC Yukon XL AT4 5.3L V8 GAS Automatic 10 Speed
  Added Aug 2023 • 23 Fuel-ups

  Property of sappermiller

• 13.9 Avg MPG

• Yukon XL

  2023 GMC Yukon XL Denali Ultimate 6.2L V8 GAS Automatic 10 Speed Sport Utility
  Added Nov 2023 • 7 Fuel-ups

  Property of jochmaster

• 15.6 Avg MPG

• My Yukon XL

  2023 GMC Yukon XL SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2023 • 20 Fuel-ups

  Property of jrojas1993

• 20.8 Avg MPG

• My Yukon XL

  2023 GMC Yukon XL Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 18 Fuel-ups

  Property of jmartinps1

• 23.2 Avg MPG

• 2023 GMC Denali

  2023 GMC Yukon XL Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2023 • 4 Fuel-ups

  Property of ehblue185

• 27.9 Avg MPG