Based on data from 133 vehicles, 5,445 fuel-ups and 2,101,862 miles of driving, the 2023 GMC Sierra 1500 gets a combined Avg MPG of 21.23 with a 0.16 MPG margin of error.

Any Engine Type 2.7L L4 GAS (5) 3.0L L6 DIESEL (78) 5.3L V8 GAS (15) 6.2L V8 GAS (18) Any Body Style Extended Cab Pickup (1) Crew Cab Pickup (29) Any Submodel Pro (1) SLE (2) AT4X (6) Denali Ultimate (8) SLT (19) Elevation (21) Denali (26) AT4 (50)

Below you can see a distribution of the fuel-ups with 49 outliers (0.89%) removed.

Following shows the average MPG of each of the 133 vehicles in the system.

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• Silver Sierra

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2023 • 48 Fuel-ups

  Property of rauschm

• 27.9 Avg MPG

• Ben's Sexy Beast

  2023 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jan 2024 • 31 Fuel-ups

  Property of Beng7782

• 25.6 Avg MPG

• JJ’s Jimmy 1500

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

  Property of TKPjwlr

• 13.5 Avg MPG

• My Sierra

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

  Property of Armro

• 26.1 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali Ultimate 3.0L L6 DIESEL Automatic 10 Speed
  Added Jan 2024 • 29 Fuel-ups

  Property of scoutmaster

• 25.4 Avg MPG

• AT4X

  2023 GMC Sierra 1500 AT4X 6.2L V8 GAS Automatic 10 Speed
  Added Feb 2023 • 123 Fuel-ups

  Property of ralph_tony

• 14.5 Avg MPG

• Sierra

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 23 Fuel-ups

  Property of nomo

• 24.4 Avg MPG

• Jeffrey Bishop

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Feb 2024 • 24 Fuel-ups

  Property of JBISHOP

• 25.8 Avg MPG

• My GMC 1500 AT4 Diesel

  2023 GMC Sierra 1500 AT4
  Added Dec 2022 • 98 Fuel-ups

  Property of Lawdog800

• 22.8 Avg MPG

• GMC

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jul 2023 • 52 Fuel-ups

  Property of dak4deals

• 23.2 Avg MPG

• truck

  2023 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Sep 2023 • 53 Fuel-ups

  Property of rob_gio

• 16.2 Avg MPG

• Duramax 3.0

  2023 GMC Sierra 1500 SLT Automatic 10 Speed Crew Cab Pickup
  Added Sep 2023 • 46 Fuel-ups

  Property of Beener909

• 25.3 Avg MPG

• Jimmy

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jun 2023 • 43 Fuel-ups

  Property of Ceteked

• 27.0 Avg MPG

• 2023 Sierra Denali

  2023 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Dec 2022 • 43 Fuel-ups

  Property of leloup6989

• 25.2 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed
  Added May 2023 • 17 Fuel-ups

  Property of lvmailman

• 17.2 Avg MPG

• 2023 GMC AT4

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

  Property of RamIdaho

• 25.8 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2023 • 30 Fuel-ups

  Property of DuramaxLZO

• 22.1 Avg MPG

• 2023 AT4 CarbonPro

  2023 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Sep 2023 • 29 Fuel-ups

  Property of CarbonPro

• 25.1 Avg MPG

• Jimmy

  2023 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed Crew Cab Pickup
  Added Sep 2023 • 43 Fuel-ups

  Property of Cadam96

• 21.6 Avg MPG

• My Sierra 1500

  2023 GMC Sierra 1500 Denali Ultimate 6.2L V8 GAS Automatic 10 Speed
  Added Jul 2023 • 13 Fuel-ups

  Property of tennesseesmith

• 17.2 Avg MPG

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