Based on data from 17 vehicles, 656 fuel-ups and 155,692 miles of driving, the 2004 GMC Sierra 2500 gets a combined Avg MPG of 11.58 with a 0.29 MPG margin of error.

Any Engine Type 6.0L V8 GAS (6) V8 DIESEL (1) V8 GAS (9) Any Body Style Extended Cab Pickup (1) Any Submodel SLT (1) Base (2) SLE (3) Other (11)

Below you can see a distribution of the fuel-ups with 15 outliers (2.24%) removed.

Following shows the average MPG of each of the 17 vehicles in the system.

• 2004 GMC Sierra

  2004 GMC Sierra 2500 SLE 6.0L V8 GAS Automatic 4 Speed Extended Cab Pickup
  Added Apr 2019 • 95 Fuel-ups

  Property of landisv

• 12.6 Avg MPG

• My Sierra 2500

  2004 GMC Sierra 2500 SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jun 2019 • 24 Fuel-ups

  Property of unclebunks

• 14.1 Avg MPG

• GMC 2500 HD

  2004 GMC Sierra 2500 DIESEL V8
  Added Jul 2013 • 198 Fuel-ups

  Property of fahuffbers

• 13.7 Avg MPG

• GMC 2500

  2004 GMC Sierra 2500 SLT 6.0L V8 GAS Automatic 4 Speed
  Added Jul 2021 • 10 Fuel-ups

  Property of Bum427

• 10.4 Avg MPG

• Josh's GMC Sierra

  2004 GMC Sierra 2500 6.0L V8 GAS
  Added Nov 2020 • 9 Fuel-ups

  Property of Dannyberm

• 13.5 Avg MPG

• Sierra

  2004 GMC Sierra 2500 GAS V8
  Added Jan 2013 • 119 Fuel-ups

  Property of profff

• 11.6 Avg MPG

• TRUCK 11

  2004 GMC Sierra 2500 6.0L V8 GAS Automatic
  Added Sep 2016 • 80 Fuel-ups

  Property of FredsTowing

• 8.7 Avg MPG

• My Sierra 2500

  2004 GMC Sierra 2500 SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jul 2016 • 13 Fuel-ups

  Property of nhynes

• 12.9 Avg MPG

• Motor Home

  2004 GMC Sierra 2500 GAS V8
  Added Nov 2008 • 44 Fuel-ups

  Property of Rody

• 7.7 Avg MPG

• HD

  2004 GMC Sierra 2500
  Added Nov 2013 • 31 Fuel-ups

  Property of eodjc

• 16.8 Avg MPG

• my p/u

  2004 GMC Sierra 2500 GAS V8
  Added May 2014 • 11 Fuel-ups

  Property of ralphh

• 13.4 Avg MPG

• 2004 GMC 1500 HD QuadraSteer 4x4

  2004 GMC Sierra 2500 GAS V8
  Added Mar 2014 • 9 Fuel-ups

  Property of gcstumb

• 12.8 Avg MPG

• North truck

  2004 GMC Sierra 2500 GAS V8
  Added May 2014 • 15 Fuel-ups

  Property of Expro

• 14.3 Avg MPG

• 04 GMC

  2004 GMC Sierra 2500 GAS V8
  Added Jul 2011 • 3 Fuel-ups

  Property of coberhaus

• 12.3 Avg MPG

• GMC Pickup

  2004 GMC Sierra 2500 GAS V8
  Added Jun 2013 • 5 Fuel-ups

  Property of charlieedwards

• 17.2 Avg MPG

• Red Truck

  2004 GMC Sierra 2500 GAS V8
  Added Aug 2012 • 33 Fuel-ups

  Property of ianmountain

• 11.7 Avg MPG

• GMC2500+6KTT

  2004 GMC Sierra 2500 GAS V8
  Added Oct 2011 • 17 Fuel-ups

  Property of gerrycormier

• 10.1 Avg MPG