Based on data from 115 vehicles, 10,264 fuel-ups and 3,350,406 miles of driving, the 2015 GMC Sierra 2500 HD gets a combined Avg MPG of 13.13 with a 0.07 MPG margin of error.

Any Engine Type 6.0L V8 CNG (2) 6.0L V8 FLEX (18) 6.0L V8 GAS (9) 6.6L V8 DIESEL (85) GAS (1) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (5) Crew Cab Pickup (24) Any Submodel Base (9) SLE (17) SLT (30) Denali (58) Other (1)

Below you can see a distribution of the fuel-ups with 140 outliers (1.35%) removed.

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

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• 2500HD

  2015 GMC Sierra 2500 HD 6.0L V8 GAS Automatic 6 Speed Standard Cab Pickup
  Added Sep 2015 • 8 Fuel-ups

  Property of acurailxel

• 13.1 Avg MPG

• GMC 2500

  2015 GMC Sierra 2500 HD SLT 6.6L DIESEL V8 Automatic 6
  Added Nov 2014 • 46 Fuel-ups

  Property of Flatsfisher

• 18.2 Avg MPG

• The Boss

  2015 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Mar 2015 • 43 Fuel-ups

  Property of mreed1491

• 11.9 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Apr 2015 • 17 Fuel-ups

  Property of dstodd02

• 12.5 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2015 • 6 Fuel-ups

  Property of leje0306

• 16.0 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD SLT 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Aug 2014 • 41 Fuel-ups

  Property of Boosh

• 13.2 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.0L V8 GAS Automatic 6 Crew Cab Pickup (4 Door)
  Added Jun 2015 • 10 Fuel-ups

  Property of CANI

• 20.2 Avg MPG

• Diesel

  2015 GMC Sierra 2500 HD Denali 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Mar 2015 • 21 Fuel-ups

  Property of racyb

• 15.5 Avg MPG

• '15 2500HD

  2015 GMC Sierra 2500 HD GAS
  Added May 2014 • 63 Fuel-ups

  Property of nosebleed

• 13.4 Avg MPG

• Sierra 2500HD 2WD Gas

  2015 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 4 Fuel-ups

  Property of JoeSierra

• 11.5 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added May 2015 • 5 Fuel-ups

  Property of eshankel

• 15.8 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2015 • 3 Fuel-ups

  Property of avgroot

• 13.6 Avg MPG

• CC

  2015 GMC Sierra 2500 HD 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jul 2014 • 20 Fuel-ups

  Property of logicbyondreason

• 13.2 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD 6.0L CNG V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 17 Fuel-ups

  Property of BTholen

• 12.2 Avg MPG

• Ruby

  2015 GMC Sierra 2500 HD SLT 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • 15 Fuel-ups

  Property of Docoptic

• 14.5 Avg MPG

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