Based on data from 118 vehicles, 13,755 fuel-ups and 3,432,902 miles of driving, the 2006 GMC Sierra 2500 HD gets a combined Avg MPG of 14.24 with a 0.05 MPG margin of error.

Any Engine Type 6.0L V8 GAS (22) 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 (69) Other (7)

Below you can see a distribution of the fuel-ups with 474 outliers (3.33%) removed.

Following shows the average MPG of each of the 118 vehicles in the system.

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• 2006 Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2021 • 205 Fuel-ups

  Property of dillyboy

• 15.9 Avg MPG

• Red Solo Truck

  2006 GMC Sierra 2500 HD Custom Submodel V8 DIESEL
  Added Jun 2012 • 196 Fuel-ups

  Property of helmet

• 15.7 Avg MPG

• Decal Truck

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jun 2018 • 13 Fuel-ups

  Property of Decalman

• 13.9 Avg MPG

• Tritnee

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2024 • 27 Fuel-ups

  Property of Lord_Commander

• 15.7 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2017 • 361 Fuel-ups

  Property of HomerDMAX

• 16.4 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Standard 6 Speed
  Added Mar 2018 • 197 Fuel-ups

  Property of Bacons2018

• 14.0 Avg MPG

• Duramax 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2022 • 417 Fuel-ups

  Property of awesomeamerican

• 16.3 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 • 697 Fuel-ups

  Property of tkemo648

• 16.1 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2022 • 113 Fuel-ups

  Property of sixsix_tom

• 15.5 Avg MPG

• GMC

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 460 Fuel-ups

  Property of BlueyZassoff

• 14.1 Avg MPG

• DookieMax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2017 • 280 Fuel-ups

  Property of Peen

• 16.6 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed
  Added Sep 2022 • 117 Fuel-ups

  Property of firedave654

• 10.2 Avg MPG

• Big Red

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2024 • 13 Fuel-ups

  Property of masseyk

• 10.3 Avg MPG

• Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 213 Fuel-ups

  Property of bsneed

• 15.3 Avg MPG

• 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 496 Fuel-ups

  Property of hummingbird63012

• 15.3 Avg MPG

• Ryan's Truck

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 5 Speed
  Added Mar 2017 • 363 Fuel-ups

  Property of rfoster

• 10.8 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD WT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jul 2015 • 262 Fuel-ups

  Property of gaskippy

• 13.4 Avg MPG

• 04 Yukon XL LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Sport Utility
  Added Mar 2018 • 295 Fuel-ups

  Property of jamisondonato

• 15.1 Avg MPG

• 2006 GMC Sierra 2500 SLE

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 454 Fuel-ups

  Property of 911never4get

• 12.5 Avg MPG

• GMC

  2006 GMC Sierra 2500 HD SL 6.0L V8 GAS Automatic 4 Speed
  Added Jun 2017 • 183 Fuel-ups

  Property of bumblebeefilms

• 11.0 Avg MPG

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