Based on data from 119 vehicles, 14,038 fuel-ups and 3,506,024 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 (22) 6.6L V8 DIESEL (88) 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 (31) SLT (69) Other (7)

Below you can see a distribution of the fuel-ups with 493 outliers (3.39%) removed.

Following shows the average MPG of each of the 119 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 Nov 2022 • 123 Fuel-ups

  Property of sixsix_tom

• 15.5 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 • 708 Fuel-ups

  Property of tkemo648

• 16.1 Avg MPG

• Tritnee

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2024 • 36 Fuel-ups

  Property of Lord_Commander

• 15.6 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2023 • 106 Fuel-ups

  Property of Andrew03

• 13.9 Avg MPG

• LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jan 2021 • 81 Fuel-ups

  Property of rarotary

• 15.2 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2017 • 442 Fuel-ups

  Property of PrestonL

• 14.4 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2017 • 368 Fuel-ups

  Property of HomerDMAX

• 16.4 Avg MPG

• Red Solo Truck

  2006 GMC Sierra 2500 HD Custom Submodel V8 DIESEL
  Added Jun 2012 • 200 Fuel-ups

  Property of helmet

• 15.7 Avg MPG

• VEH-016

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jan 2023 • 131 Fuel-ups

  Property of bentleylandscape

• 9.4 Avg MPG

• Betsy

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2021 • 33 Fuel-ups

  Property of carpkid805

• 17.7 Avg MPG

• 2006 Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2021 • 214 Fuel-ups

  Property of dillyboy

• 15.9 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Standard 6 Speed
  Added Mar 2018 • 199 Fuel-ups

  Property of Bacons2018

• 14.0 Avg MPG

• 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 498 Fuel-ups

  Property of hummingbird63012

• 15.3 Avg MPG

• Big Red

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2024 • 18 Fuel-ups

  Property of masseyk

• 11.4 Avg MPG

• Duramax 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2022 • 423 Fuel-ups

  Property of awesomeamerican

• 16.3 Avg MPG

• GMC 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 265 Fuel-ups

  Property of xds

• 14.1 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed
  Added Sep 2022 • 123 Fuel-ups

  Property of firedave654

• 10.2 Avg MPG

• 04 Yukon XL LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Sport Utility
  Added Mar 2018 • 303 Fuel-ups

  Property of jamisondonato

• 15.1 Avg MPG

• LB Zed

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 52 Fuel-ups

  Property of Wdoc

• 15.0 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added May 2022 • 94 Fuel-ups

  Property of theminthawk

• 11.5 Avg MPG

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