Based on data from 115 vehicles, 3,203 fuel-ups and 1,217,142 miles of driving, the 2023 GMC Sierra 1500 gets a combined Avg MPG of 21.05 with a 0.21 MPG margin of error.

Any Engine Type 2.7L L4 GAS (4) 3.0L L6 DIESEL (67) 5.3L V8 GAS (13) 6.2L V8 GAS (14) Any Body Style Extended Cab Pickup (1) Crew Cab Pickup (25) Any Submodel SLE (1) AT4X (4) Denali Ultimate (8) SLT (18) Elevation (20) Denali (21) AT4 (43)

Below you can see a distribution of the fuel-ups with 31 outliers (0.96%) removed.

Following shows the average MPG of each of the 115 vehicles in the system.

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• Red

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Oct 2023 • 5 Fuel-ups

  Property of l8TMike

• 23.6 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 6 Fuel-ups

  Property of ryanbaroni

• 23.7 Avg MPG

• Summer

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jun 2023 • 32 Fuel-ups

  Property of LiquidOceot

• 22.2 Avg MPG

• Jimmy

  2023 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed Crew Cab Pickup
  Added Sep 2023 • 22 Fuel-ups

  Property of Cadam96

• 20.3 Avg MPG

• My GMC DENALI

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Mar 2023 • 5 Fuel-ups

  Property of dmac1026

• 19.1 Avg MPG

• Steve's Pick Up

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed Extended Cab Pickup
  Added Sep 2023 • 17 Fuel-ups

  Property of stevez494

• 28.7 Avg MPG

• Denali

  2023 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Nov 2023 • 16 Fuel-ups

  Property of joemwade

• 15.7 Avg MPG

• Jimmy

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jun 2023 • 26 Fuel-ups

  Property of Ceteked

• 26.9 Avg MPG

• Denali

  2023 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 23 Fuel-ups

  Property of mysticpeanut

• 17.3 Avg MPG

• Sierra 1500 Elevation Duramax

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 22 Fuel-ups

  Property of RenaissanceMan65

• 24.5 Avg MPG

• Toothless

  2023 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 21 Fuel-ups

  Property of ChrisHager

• 13.8 Avg MPG

• GMC

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 25 Fuel-ups

  Property of dak4deals

• 23.6 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed
  Added May 2023 • 13 Fuel-ups

  Property of lvmailman

• 17.3 Avg MPG

• Sierra

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 14 Fuel-ups

  Property of nomo

• 24.6 Avg MPG

• Jeffrey Bishop

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Feb 2024 • 12 Fuel-ups

  Property of JBISHOP

• 25.5 Avg MPG

• ‘23 GMC Sierra Denali - Ruby

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

  Property of Sparking1

• 25.5 Avg MPG

• B&S Truck 335

  2023 GMC Sierra 1500 SLE 2.7L L4 GAS Automatic 10 Speed
  Added Sep 2023 • 62 Fuel-ups

  Property of rcrayj

• 18.6 Avg MPG

• My Sierra

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Apr 2023 • 28 Fuel-ups

  Property of Armro

• 27.2 Avg MPG

• 23AT4

  2023 GMC Sierra 1500 AT4 Automatic 10 Speed Crew Cab Pickup
  Added Nov 2023 • 13 Fuel-ups

  Property of TiffaniennJoe

• 24.3 Avg MPG

• 23 Sierra

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL
  Added Sep 2023 • 15 Fuel-ups

  Property of Dura-Brad

• 24.8 Avg MPG

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