Based on data from 141 vehicles, 6,307 fuel-ups and 2,413,690 miles of driving, the 2023 GMC Sierra 1500 gets a combined Avg MPG of 21.10 with a 0.15 MPG margin of error.

Any Engine Type 2.7L L4 GAS (5) 3.0L L6 DIESEL (83) 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 (53)

Below you can see a distribution of the fuel-ups with 64 outliers (1.00%) removed.

Following shows the average MPG of each of the 141 vehicles in the system.

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• Jonathon’s GMC

  2023 GMC Sierra 1500 Elevation
  Added Jan 2023 • 113 Fuel-ups

  Property of luc_sko

• 26.4 Avg MPG

• Jimmy

  2023 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed Crew Cab Pickup
  Added Sep 2023 • 54 Fuel-ups

  Property of Cadam96

• 21.0 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 8 Speed
  Added Nov 2024 • 13 Fuel-ups

  Property of pancakecheenis

• 16.4 Avg MPG

• AT4

  2023 GMC Sierra 1500 AT4
  Added Mar 2023 • 52 Fuel-ups

  Property of jlkeiser70

• 24.5 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Dec 2024 • 5 Fuel-ups

  Property of jlafollette07

• 25.6 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Jun 2024 • 32 Fuel-ups

  Property of Lanlo65

• 26.5 Avg MPG

• Sierra

  2023 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Jan 2025 • 5 Fuel-ups

  Property of hjorthc

• 14.9 Avg MPG

• My Sierra 1500 AT4

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Jun 2024 • 38 Fuel-ups

  Property of Highfreak

• 19.9 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 76 Fuel-ups

  Property of colesims

• 25.0 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4X 6.2L V8 GAS Automatic 10 Speed
  Added Nov 2024 • 38 Fuel-ups

  Property of TNRAMBox

• 15.4 Avg MPG

• truck

  2023 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Sep 2023 • 60 Fuel-ups

  Property of rob_gio

• 16.1 Avg MPG

• Rush

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

  Property of G35lover

• 21.8 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed
  Added Nov 2023 • 41 Fuel-ups

  Property of Brut

• 16.8 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2024 • 25 Fuel-ups

  Property of Btucker6

• 22.1 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2024 • 23 Fuel-ups

  Property of eswanson

• 25.1 Avg MPG

• GMC

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 57 Fuel-ups

  Property of dak4deals

• 23.0 Avg MPG

• AT4X

  2023 GMC Sierra 1500 AT4X 6.2L V8 GAS Automatic 10 Speed
  Added Feb 2023 • 129 Fuel-ups

  Property of ralph_tony

• 14.4 Avg MPG

• My GMC DENALI

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Mar 2023 • 21 Fuel-ups

  Property of dmac1026

• 19.1 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2023 • 46 Fuel-ups

  Property of Fubar247

• 22.9 Avg MPG

• Jeffrey Bishop

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Feb 2024 • 28 Fuel-ups

  Property of JBISHOP

• 25.7 Avg MPG

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