Based on data from 49 vehicles, 2,463 fuel-ups and 764,820 miles of driving, the 2003 GMC Sierra 2500 HD gets a combined Avg MPG of 14.24 with a 0.15 MPG margin of error.

Any Engine Type 6.0L V8 GAS (6) 6.6L V8 DIESEL (32) 8.1L V8 GAS (2) V8 DIESEL (4) V8 GAS (4) Any Body Style Extended Cab Pickup (5) Crew Cab Pickup (6) Any Submodel WT (1) Base (5) SLE (15) SLT (21) Other (7)

Below you can see a distribution of the fuel-ups with 47 outliers (1.87%) removed.

Following shows the average MPG of each of the 49 vehicles in the system.

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• Duramax

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Mar 2018 • 193 Fuel-ups

  Property of timp1968

• 16.5 Avg MPG

• DirtyMAX

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Jul 2018 • 20 Fuel-ups

  Property of SirRoland

• 13.9 Avg MPG

• 2500HD

  2003 GMC Sierra 2500 HD GAS V8
  Added Jun 2013 • 128 Fuel-ups

  Property of M42E36

• 13.0 Avg MPG

• 2003 GMC Sierra Duramax

  2003 GMC Sierra 2500 HD 6.6L V8 DIESEL Automatic 5 Speed Extended Cab Pickup
  Added Feb 2017 • 63 Fuel-ups

  Property of srlew

• 15.5 Avg MPG

• My Sierra 2500 HD

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added May 2017 • 55 Fuel-ups

  Property of Mpmcnasty

• 16.3 Avg MPG

• Duramax

  2003 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Jul 2018 • 4 Fuel-ups

  Property of Dirtyblackhoe

• 15.1 Avg MPG

• Thirsty 2500HD Beast

  2003 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed
  Added Jul 2017 • 18 Fuel-ups

  Property of StrykerX

• 9.0 Avg MPG

• My Sierra 2500 HD

  2003 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Aug 2018 • 17 Fuel-ups

  Property of hounddog1977

• 10.5 Avg MPG

• Sierra

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added May 2017 • 102 Fuel-ups

  Property of 2xGrey

• 16.6 Avg MPG

• Gmc Truck

  2003 GMC Sierra 2500 HD 6.6L V8 DIESEL
  Added Oct 2017 • 86 Fuel-ups

  Property of jfyoung11

• 11.0 Avg MPG

• 2003 Sierra 2500 HD

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Standard 6 Speed
  Added Dec 2017 • 45 Fuel-ups

  Property of polarxj

• 16.9 Avg MPG

• GMC 2500hd

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Sep 2016 • 27 Fuel-ups

  Property of mdw612

• 18.8 Avg MPG

• Sierra 2500 HD

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Dec 2016 • 39 Fuel-ups

  Property of jmeier301

• 14.9 Avg MPG

• The DIRTY

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Dec 2014 • 164 Fuel-ups

  Property of 10janderson3

• 14.4 Avg MPG

• GMC

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed Extended Cab Pickup
  Added Nov 2017 • 20 Fuel-ups

  Property of jim44

• 16.9 Avg MPG

• 2003 GMC

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Sep 2016 • 61 Fuel-ups

  Property of racerx146

• 13.8 Avg MPG

• Duramax

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Feb 2013 • 209 Fuel-ups

  Property of DAVe3283

• 15.9 Avg MPG

• GMC Duramax

  2003 GMC Sierra 2500 HD SLE
  Added Jun 2018 • 138 Fuel-ups

  Property of main1

• 14.1 Avg MPG

• My Sierra 2500 HD

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added May 2017 • 12 Fuel-ups

  Property of davidrperkins

• 14.7 Avg MPG

• 03 GMC Sierra 2500 HD

  2003 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Nov 2016 • 60 Fuel-ups

  Property of Suncoaster

• 17.6 Avg MPG

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