Based on data from 114 vehicles, 13,210 fuel-ups and 3,289,894 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 437 outliers (3.20%) removed.

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

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• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2023 • 49 Fuel-ups

  Property of joesauto24

• 14.0 Avg MPG

• 2006 Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 255 Fuel-ups

  Property of oskam6

• 14.1 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2017 • 331 Fuel-ups

  Property of HomerDMAX

• 16.3 Avg MPG

• 2006 Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2021 • 154 Fuel-ups

  Property of dillyboy

• 15.7 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed
  Added Sep 2022 • 80 Fuel-ups

  Property of firedave654

• 10.2 Avg MPG

• VEH-016

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jan 2023 • 63 Fuel-ups

  Property of bentleylandscape

• 9.5 Avg MPG

• GMC 2500

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed Extended Cab Pickup
  Added Oct 2019 • 270 Fuel-ups

  Property of ProCycle

• 15.2 Avg MPG

• Brett's Truck

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 236 Fuel-ups

  Property of bgarner6581

• 14.8 Avg MPG

• Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 193 Fuel-ups

  Property of bsneed

• 15.6 Avg MPG

• Duramax 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2022 • 388 Fuel-ups

  Property of awesomeamerican

• 15.8 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2017 • 394 Fuel-ups

  Property of PrestonL

• 14.6 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added May 2022 • 51 Fuel-ups

  Property of theminthawk

• 11.3 Avg MPG

• Betsy

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2021 • 23 Fuel-ups

  Property of carpkid805

• 17.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2023 • 38 Fuel-ups

  Property of Andrew03

• 13.4 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 • 650 Fuel-ups

  Property of tkemo648

• 16.2 Avg MPG

• 06lly (Imported

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 599 Fuel-ups

  Property of Dleamon84

• 14.6 Avg MPG

• Red Solo Truck

  2006 GMC Sierra 2500 HD Custom Submodel V8 DIESEL
  Added Jun 2012 • 181 Fuel-ups

  Property of helmet

• 15.8 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

• 04 Yukon XL LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Sport Utility
  Added Mar 2018 • 268 Fuel-ups

  Property of jamisondonato

• 15.0 Avg MPG

• LB Zed

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 43 Fuel-ups

  Property of Wdoc

• 15.0 Avg MPG

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