Based on data from 114 vehicles, 13,178 fuel-ups and 3,280,540 miles of driving, the 2006 GMC Sierra 2500 HD gets a combined Avg MPG of 14.27 with a 0.05 MPG margin of error.

Any Engine Type 6.0L V8 GAS (20) 6.6L V8 DIESEL (85) 8.1L V8 GAS (1) V8 DIESEL (3) V8 GAS (3) Any Body Style Sport Utility (1) Extended Cab Pickup (5) Crew Cab Pickup (31) Any Submodel WT (5) SL (6) SLE (29) SLT (67) Other (7)

Below you can see a distribution of the fuel-ups with 436 outliers (3.20%) removed.

Following shows the average MPG of each of the 114 vehicles in the system.

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• Sierra 2500 HD 4wd Crew

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Oct 2016 • 64 Fuel-ups

  Property of CowboyCadillac

• 14.7 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

• Truck

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Dec 2018 • 68 Fuel-ups

  Property of Hagfan72

• 10.1 Avg MPG

• Gmc Sierra

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Nov 2017 • 29 Fuel-ups

  Property of cement

• 13.5 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

• My Sierra 2500 HD

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

  Property of reece650

• 12.5 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

• Gmc

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Dec 2020 • 38 Fuel-ups

  Property of brentah272

• 11.0 Avg MPG

• GMC

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jul 2018 • 23 Fuel-ups

  Property of melissachaplin

• 15.3 Avg MPG

• 2006 Duramax

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2021 • 210 Fuel-ups

  Property of JarrettR

• 12.0 Avg MPG

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