Based on data from 117 vehicles, 13,579 fuel-ups and 3,387,551 miles of driving, the 2006 GMC Sierra 2500 HD gets a combined Avg MPG of 14.25 with a 0.05 MPG margin of error.

Any Engine Type 6.0L V8 GAS (21) 6.6L V8 DIESEL (87) 8.1L V8 GAS (1) V8 DIESEL (3) V8 GAS (3) Any Body Style Sport Utility (1) Extended Cab Pickup (5) Crew Cab Pickup (33) Any Submodel SL (6) WT (6) SLE (30) SLT (68) Other (7)

Below you can see a distribution of the fuel-ups with 471 outliers (3.35%) removed.

Following shows the average MPG of each of the 117 vehicles in the system.

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• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2024 • 5 Fuel-ups

  Property of JuicyDrewcy

• 15.3 Avg MPG

• DirtyMax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2019 • 112 Fuel-ups

  Property of polarisn1

• 15.2 Avg MPG

• GMC 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 263 Fuel-ups

  Property of xds

• 14.1 Avg MPG

• LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2023 • 14 Fuel-ups

  Property of schra644

• 12.9 Avg MPG

• GMC Sierra 2500HD

  2006 GMC Sierra 2500 HD SLE
  Added Mar 2018 • 182 Fuel-ups

  Property of lb7duramax24

• 16.8 Avg MPG

• Big Red

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2019 • 63 Fuel-ups

  Property of RT334

• 14.6 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2023 • 8 Fuel-ups

  Property of Kdogg

• 16.1 Avg MPG

• My LBZ Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2022 • 8 Fuel-ups

  Property of garrettlbz

• 14.0 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2023 • 4 Fuel-ups

  Property of dada23

• 15.3 Avg MPG

• MadMax

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed Extended Cab Pickup
  Added Apr 2023 • 8 Fuel-ups

  Property of Andrew2AWF

• 15.6 Avg MPG

• White Lightning

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2020 • 73 Fuel-ups

  Property of 1122steven

• 17.2 Avg MPG

• GMC diesel 2500

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Extended Cab Pickup
  Added May 2017 • 50 Fuel-ups

  Property of craigmac215

• 12.6 Avg MPG

• GMC Pickup

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 373 Fuel-ups

  Property of ernie6767

• 14.7 Avg MPG

• SLDTRUK

  2006 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 4 Speed
  Added Dec 2016 • 36 Fuel-ups

  Property of Entropical1

• 8.8 Avg MPG

• Justin woods

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Dec 2017 • 337 Fuel-ups

  Property of 06lbz

• 14.7 Avg MPG

• 2006 GMC Sierra Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2022 • 13 Fuel-ups

  Property of promod400exridr

• 15.0 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jun 2021 • 59 Fuel-ups

  Property of dchiach

• 12.8 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Mar 2022 • 13 Fuel-ups

  Property of Glockskie

• 12.5 Avg MPG

• D-Max work truck

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2018 • 322 Fuel-ups

  Property of sconlee03

• 13.6 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2022 • 10 Fuel-ups

  Property of 06GMC

• 5.1 Avg MPG

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