Based on data from 147 vehicles, 7,535 fuel-ups and 2,865,113 miles of driving, the 2023 GMC Sierra 1500 gets a combined Avg MPG of 20.97 with a 0.14 MPG margin of error.

Any Engine Type 2.7L L4 GAS (6) 3.0L L6 DIESEL (86) 5.3L V8 GAS (18) 6.2L V8 GAS (21) Any Body Style Extended Cab Pickup (1) Crew Cab Pickup (36) Any Submodel Pro (1) SLE (2) AT4X (7) Denali Ultimate (8) SLT (20) Elevation (23) Denali (31) AT4 (55)

Below you can see a distribution of the fuel-ups with 70 outliers (0.92%) removed.

Following shows the average MPG of each of the 147 vehicles in the system.

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• My Sierra 1500

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Apr 2024 • 83 Fuel-ups

  Property of JFerenczi

• 27.0 Avg MPG

• AT4

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jan 2024 • 92 Fuel-ups

  Property of Schilling

• 23.7 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed
  Added Jun 2024 • 35 Fuel-ups

  Property of KevsEcodiesel

• 16.6 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali Ultimate 6.2L V8 GAS Automatic 10 Speed
  Added Jun 2023 • 232 Fuel-ups

  Property of tlrskunk

• 16.4 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed
  Added Jun 2023 • 239 Fuel-ups

  Property of artmax480

• 19.5 Avg MPG

• JJ’s Jimmy 1500

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed
  Added Aug 2023 • 56 Fuel-ups

  Property of TKPjwlr

• 13.6 Avg MPG

• My Sierra

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Jan 2025 • 9 Fuel-ups

  Property of FishNJ

• 22.2 Avg MPG

• myAT4

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added May 2023 • 78 Fuel-ups

  Property of corneliani

• 23.1 Avg MPG

• AT4

  2023 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Aug 2023 • 125 Fuel-ups

  Property of Sicario8690

• 15.6 Avg MPG

• 2023 GMC Sierra 1500 AT4

  2023 GMC Sierra 1500 AT4
  Added Dec 2022 • 90 Fuel-ups

  Property of ndorval

• 22.4 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Apr 2024 • 116 Fuel-ups

  Property of codymast

• 25.2 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
  Added Jun 2023 • 62 Fuel-ups

  Property of gmuick

• 15.3 Avg MPG

• Raider

  2023 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Dec 2024 • 20 Fuel-ups

  Property of sweevehicles24

• 17.5 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Jun 2023 • 63 Fuel-ups

  Property of mskalak

• 24.0 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 24 Fuel-ups

  Property of ryanbaroni

• 23.2 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2024 • 39 Fuel-ups

  Property of Thickdickdaddy

• 20.2 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali Ultimate 3.0L L6 DIESEL Automatic 10 Speed
  Added Jan 2024 • 42 Fuel-ups

  Property of scoutmaster

• 24.5 Avg MPG

• Denali

  2023 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Nov 2023 • 45 Fuel-ups

  Property of joemwade

• 16.1 Avg MPG

• Jimmy

  2023 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed Crew Cab Pickup
  Added Sep 2023 • 66 Fuel-ups

  Property of Cadam96

• 20.8 Avg MPG

• '23 Sierra

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Apr 2025 • 177 Fuel-ups

  Property of KiwiBoss

• 15.7 Avg MPG

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