Based on data from 103 vehicles, 11,945 fuel-ups and 2,992,717 miles of driving, the 2006 GMC Sierra 2500 HD gets a combined Avg MPG of 14.32 with a 0.06 MPG margin of error.

Any Engine Type 6.0L V8 GAS (18) 6.6L V8 DIESEL (76) 8.1L V8 GAS (1) V8 DIESEL (3) V8 GAS (3) Any Body Style Sport Utility (1) Extended Cab Pickup (4) Crew Cab Pickup (29) Any Submodel SL (5) WT (5) SLE (25) SLT (61) Other (7)

Below you can see a distribution of the fuel-ups with 164 outliers (1.35%) removed.

Following shows the average MPG of each of the 103 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 Aug 2017 • 301 Fuel-ups

  Property of PrestonL

• 14.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed
  Added Sep 2022 • 16 Fuel-ups

  Property of firedave654

• 9.9 Avg MPG

• 2006 Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 224 Fuel-ups

  Property of oskam6

• 14.2 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Dec 2018 • 58 Fuel-ups

  Property of Hagfan72

• 10.3 Avg MPG

• Red Solo Truck

  2006 GMC Sierra 2500 HD Custom Submodel V8 DIESEL
  Added Jun 2012 • 153 Fuel-ups

  Property of helmet

• 15.9 Avg MPG

• My Sierra 2500 HD

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

  Property of sixsix_tom

• 13.7 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD WT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jul 2015 • 220 Fuel-ups

  Property of gaskippy

• 13.5 Avg MPG

• 2006 GMC Sierra 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jun 2018 • 554 Fuel-ups

  Property of tkemo648

• 16.4 Avg MPG

• DookieMax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2017 • 255 Fuel-ups

  Property of Peen

• 16.8 Avg MPG

• 2006 GMC Sierra 2500 SLE

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 401 Fuel-ups

  Property of 911never4get

• 12.7 Avg MPG

• Ryan's Truck

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 5 Speed
  Added Mar 2017 • 302 Fuel-ups

  Property of rfoster

• 10.9 Avg MPG

• Quiv

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2017 • 238 Fuel-ups

  Property of JordanTr

• 16.0 Avg MPG

• Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 141 Fuel-ups

  Property of bsneed

• 15.7 Avg MPG

• 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 428 Fuel-ups

  Property of hummingbird63012

• 15.2 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2017 • 285 Fuel-ups

  Property of HomerDMAX

• 16.1 Avg MPG

• 04 Yukon XL LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Sport Utility
  Added Mar 2018 • 220 Fuel-ups

  Property of jamisondonato

• 14.9 Avg MPG

• GMC

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 390 Fuel-ups

  Property of BlueyZassoff

• 14.5 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

• 06lly (Imported

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 577 Fuel-ups

  Property of Dleamon84

• 14.6 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added May 2022 • 18 Fuel-ups

  Property of theminthawk

• 11.7 Avg MPG

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