Based on data from 111 vehicles, 9,190 fuel-ups and 2,979,367 miles of driving, the 2015 GMC Sierra 2500 HD gets a combined Avg MPG of 13.10 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 (10) 6.6L V8 DIESEL (80) GAS (1) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (5) Crew Cab Pickup (23) Any Submodel Base (8) SLE (15) SLT (29) Denali (58) Other (1)

Below you can see a distribution of the fuel-ups with 121 outliers (1.30%) removed.

Following shows the average MPG of each of the 111 vehicles in the system.

• «
• 1
• 2
• 3
• 4
• 5
• 6
• »

• GMC Sierra 2500 HD

  2015 GMC Sierra 2500 HD SLE 6.0L V8 FLEX Automatic 6 Speed
  Added Sep 2017 • 374 Fuel-ups

  Property of artywoof

• 9.6 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2021 • 51 Fuel-ups

  Property of natesmith16

• 17.5 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2018 • 140 Fuel-ups

  Property of henley0926

• 13.3 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2018 • 73 Fuel-ups

  Property of dirtymax15

• 13.6 Avg MPG

• Denali

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2018 • 305 Fuel-ups

  Property of KTBHDH

• 12.0 Avg MPG

• Black Beauty

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Dec 2020 • 67 Fuel-ups

  Property of mschweizer68

• 16.3 Avg MPG

• My Truck

  2015 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Mar 2020 • 422 Fuel-ups

  Property of MikeJ135

• 14.2 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2019 • 63 Fuel-ups

  Property of k1llswitch

• 14.2 Avg MPG

• El Caballo Negro

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2020 • 73 Fuel-ups

  Property of jpvilches86

• 17.1 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2021 • 163 Fuel-ups

  Property of rjkaoud

• 12.6 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2017 • 319 Fuel-ups

  Property of DuramaxPoke

• 13.5 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2018 • 133 Fuel-ups

  Property of hunter9312

• 16.7 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2019 • 205 Fuel-ups

  Property of alibarle

• 14.8 Avg MPG

• Sierra 2500 HD

  2015 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2018 • 106 Fuel-ups

  Property of DooChess

• 15.3 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jun 2015 • 327 Fuel-ups

  Property of flymhi

• 15.3 Avg MPG

• GMC Sierra

  2015 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed
  Added Nov 2019 • 60 Fuel-ups

  Property of ethanranft

• 12.1 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2021 • 67 Fuel-ups

  Property of cibalibeb

• 12.7 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2021 • 50 Fuel-ups

  Property of cdwarren

• 15.1 Avg MPG

• My Sierra 2500 HD

  2015 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2020 • 31 Fuel-ups

  Property of SnowRiderJ

• 11.3 Avg MPG

• 2015 Sierra 2500

  2015 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2015 • 177 Fuel-ups

  Property of hemigoat2003

• 13.1 Avg MPG

• «
• 1
• 2
• 3
• 4
• 5
• 6
• »