Based on data from 99 vehicles, 3,198 fuel-ups and 1,157,829 miles of driving, the 2024 GMC Sierra 2500 HD gets a combined Avg MPG of 13.67 with a 0.12 MPG margin of error.

Any Engine Type 6.6L V8 DIESEL (86) 6.6L V8 GAS (12) V8 DIESEL (1) Any Body Style Standard Cab Pickup (1) Crew Cab Pickup (12) Any Submodel Pro (4) SLE (8) SLT (12) Denali (17) Denali Ultimate (18) AT4 (39) Other (1)

Below you can see a distribution of the fuel-ups with 20 outliers (0.62%) removed.

Following shows the average MPG of each of the 99 vehicles in the system.

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• Denali

  2024 GMC Sierra 2500 HD Denali Ultimate 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Oct 2024 • 17 Fuel-ups

  Property of bsample

• 15.3 Avg MPG

• GMC Sierra 2500 HD 2024

  2024 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
  Added Aug 2023 • 39 Fuel-ups

  Property of markaZ

• 12.2 Avg MPG

• Sierra 2500 HD Denali Ultimate

  2024 GMC Sierra 2500 HD Denali Ultimate 6.6L V8 DIESEL Automatic 10 Speed
  Added Jul 2024 • 55 Fuel-ups

  Property of RebelPlumber

• 15.7 Avg MPG

• Sierra 2500 HD Ultimate

  2024 GMC Sierra 2500 HD Denali Ultimate 6.6L V8 DIESEL Automatic 10 Speed
  Added Oct 2023 • 83 Fuel-ups

  Property of flymhi

• 13.9 Avg MPG

• Sammy 2

  2024 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 10 Speed
  Added May 2024 • 49 Fuel-ups

  Property of bburv

• 15.7 Avg MPG

• My Sierra 2500 HD

  2024 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
  Added Sep 2024 • 64 Fuel-ups

  Property of acgreen73

• 13.3 Avg MPG

• Bolt

  2024 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
  Added Mar 2024 • 58 Fuel-ups

  Property of dntharrison

• 12.1 Avg MPG

• Sierra 2500 HD

  2024 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
  Added Sep 2024 • 14 Fuel-ups

  Property of milestoempty

• 16.7 Avg MPG

• My Sierra 2500 HD

  2024 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
  Added Jun 2024 • 24 Fuel-ups

  Property of wilsonam

• 16.3 Avg MPG

• My Sierra 2500 HD

  2024 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
  Added Nov 2024 • 30 Fuel-ups

  Property of lewisbriand

• 15.0 Avg MPG

• My Sierra 2500 HD

  2024 GMC Sierra 2500 HD AT4 6.6L V8 GAS Automatic 10 Speed
  Added May 2025 • 6 Fuel-ups

  Property of pgfitzgerald

• 10.1 Avg MPG

• BIG RED

  2024 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jul 2024 • 148 Fuel-ups

  Property of Thekwthemost

• 10.4 Avg MPG

• Grey Ghost

  2024 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Apr 2024 • 39 Fuel-ups

  Property of wondergeek

• 14.3 Avg MPG

• My Sierra 2500 HD

  2024 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 10 Speed
  Added Jun 2024 • 26 Fuel-ups

  Property of jblythe

• 13.6 Avg MPG

• myGMC

  2024 GMC Sierra 2500 HD Denali Ultimate 6.6L V8 DIESEL Automatic 10 Speed
  Added Jul 2023 • 81 Fuel-ups

  Property of iPCFX

• 15.0 Avg MPG

• My Sierra 2500 HD

  2024 GMC Sierra 2500 HD AT4 6.6L V8 DIESEL Automatic 10 Speed
  Added Apr 2025 • 6 Fuel-ups

  Property of SeekRest

• 14.3 Avg MPG

• Dee Sierra 2500 HD

  2024 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
  Added Aug 2024 • 50 Fuel-ups

  Property of deewhite

• 12.3 Avg MPG

• Heavy D

  2024 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed
  Added Jan 2024 • 54 Fuel-ups

  Property of MrScubaBHT

• 14.9 Avg MPG

• Denali Diesel

  2024 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jan 2024 • 28 Fuel-ups

  Property of WinePress

• 13.4 Avg MPG

• 2024 GMC Sierra 2500 HD

  2024 GMC Sierra 2500 HD SLE 6.6L V8 GAS
  Added Oct 2023 • 46 Fuel-ups

  Property of iragobat

• 11.9 Avg MPG

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