Based on data from 140 vehicles, 6,132 fuel-ups and 2,350,271 miles of driving, the 2023 GMC Sierra 1500 gets a combined Avg MPG of 21.12 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 Denali 6.2L V8 GAS Automatic 10 Speed
  Added Jun 2024 • 19 Fuel-ups

  Property of KevsEcodiesel

• 16.5 Avg MPG

• Sierra

  2023 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Jan 2025 • 4 Fuel-ups

  Property of hjorthc

• 15.2 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Oct 2024 • 9 Fuel-ups

  Property of MaxTowing

• 22.0 Avg MPG

• My GMC DENALI

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Mar 2023 • 20 Fuel-ups

  Property of dmac1026

• 19.1 Avg MPG

• My Sierra 1500 Again

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 32 Fuel-ups

  Property of shiftracer247

• 26.4 Avg MPG

• truck

  2023 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Sep 2023 • 58 Fuel-ups

  Property of rob_gio

• 16.1 Avg MPG

• myAT4

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added May 2023 • 64 Fuel-ups

  Property of corneliani

• 23.1 Avg MPG

• Sierra

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 27 Fuel-ups

  Property of nomo

• 24.6 Avg MPG

• Sierra 1500 AT4

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 62 Fuel-ups

  Property of bmudd89

• 22.2 Avg MPG

• Rush

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

  Property of G35lover

• 21.9 Avg MPG

• Duramax 3.0

  2023 GMC Sierra 1500 SLT Automatic 10 Speed Crew Cab Pickup
  Added Sep 2023 • 50 Fuel-ups

  Property of Beener909

• 25.8 Avg MPG

• Jeffrey Bishop

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Feb 2024 • 27 Fuel-ups

  Property of JBISHOP

• 25.7 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed
  Added Nov 2023 • 39 Fuel-ups

  Property of Brut

• 16.9 Avg MPG

• ‘23 GMC Sierra Denali - Ruby

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 29 Fuel-ups

  Property of Sparking1

• 25.7 Avg MPG

• Sierra 1500 (Black Betty)

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

  Property of Skully54

• 28.5 Avg MPG

• Silver Sierra

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 52 Fuel-ups

  Property of rauschm

• 27.8 Avg MPG

• 2023 Sierra 1500

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

  Property of cacf999

• 19.5 Avg MPG

• My Sierra 1500

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

  Property of farmer4ia

• 19.7 Avg MPG

• Jimmy

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jun 2023 • 48 Fuel-ups

  Property of Ceteked

• 27.0 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 44 Fuel-ups

  Property of ScubaJ13

• 24.7 Avg MPG

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