Based on data from 117 vehicles, 13,590 fuel-ups and 3,390,508 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 472 outliers (3.36%) removed.

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

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• Red Solo Truck

  2006 GMC Sierra 2500 HD Custom Submodel V8 DIESEL
  Added Jun 2012 • 192 Fuel-ups

  Property of helmet

• 15.8 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD WT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jul 2015 • 258 Fuel-ups

  Property of gaskippy

• 13.5 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Dec 2018 • 75 Fuel-ups

  Property of Hagfan72

• 10.2 Avg MPG

• Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 211 Fuel-ups

  Property of bsneed

• 15.3 Avg MPG

• GMC

  2006 GMC Sierra 2500 HD SL 6.0L V8 GAS Automatic 4 Speed
  Added Jun 2017 • 182 Fuel-ups

  Property of bumblebeefilms

• 11.0 Avg MPG

• Brett's Truck

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 240 Fuel-ups

  Property of bgarner6581

• 14.8 Avg MPG

• 2006 GMC Sierra 2500 SLE

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 450 Fuel-ups

  Property of 911never4get

• 12.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2023 • 10 Fuel-ups

  Property of jkelleher22

• 13.8 Avg MPG

• 06lly (Imported

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 608 Fuel-ups

  Property of Dleamon84

• 14.6 Avg MPG

• GMC

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 453 Fuel-ups

  Property of BlueyZassoff

• 14.1 Avg MPG

• GMC Sierra

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 354 Fuel-ups

  Property of jasezr2

• 13.7 Avg MPG

• Ryan's Truck

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 5 Speed
  Added Mar 2017 • 350 Fuel-ups

  Property of rfoster

• 10.8 Avg MPG

• Betsy

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2021 • 29 Fuel-ups

  Property of carpkid805

• 17.8 Avg MPG

• LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jan 2021 • 76 Fuel-ups

  Property of rarotary

• 15.2 Avg MPG

• Big Red

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2024 • 12 Fuel-ups

  Property of masseyk

• 9.0 Avg MPG

• 04 Yukon XL LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Sport Utility
  Added Mar 2018 • 293 Fuel-ups

  Property of jamisondonato

• 15.1 Avg MPG

• 06 GMC Sierra CCSB

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2024 • 10 Fuel-ups

  Property of craigmac215

• 9.8 Avg MPG

• Gmc Sierra

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Nov 2017 • 35 Fuel-ups

  Property of cement

• 13.1 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2017 • 147 Fuel-ups

  Property of reece650

• 12.4 Avg MPG

• Sierra 2500 HD 4wd Crew

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2016 • 66 Fuel-ups

  Property of CowboyCadillac

• 14.7 Avg MPG

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