Based on data from 117 vehicles, 13,652 fuel-ups and 3,406,489 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 (3.34%) removed.

Following shows the average MPG of each of the 117 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 • 199 Fuel-ups

  Property of dillyboy

• 15.9 Avg MPG

• GMC 2500

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Mar 2023 • 244 Fuel-ups

  Property of cogborn84

• 11.0 Avg MPG

• Quiv

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2017 • 273 Fuel-ups

  Property of JordanTr

• 16.1 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2017 • 423 Fuel-ups

  Property of PrestonL

• 14.5 Avg MPG

• 2006 Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 273 Fuel-ups

  Property of oskam6

• 14.0 Avg MPG

• Red Solo Truck

  2006 GMC Sierra 2500 HD Custom Submodel V8 DIESEL
  Added Jun 2012 • 194 Fuel-ups

  Property of helmet

• 15.8 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 • 690 Fuel-ups

  Property of tkemo648

• 16.1 Avg MPG

• Duramax 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2022 • 414 Fuel-ups

  Property of awesomeamerican

• 16.2 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added May 2022 • 85 Fuel-ups

  Property of theminthawk

• 11.5 Avg MPG

• VEH-016

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jan 2023 • 113 Fuel-ups

  Property of bentleylandscape

• 9.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed
  Added Sep 2022 • 111 Fuel-ups

  Property of firedave654

• 10.2 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Standard 6 Speed
  Added Mar 2018 • 192 Fuel-ups

  Property of Bacons2018

• 14.1 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2022 • 107 Fuel-ups

  Property of sixsix_tom

• 15.4 Avg MPG

• Patrick 3.0

  2006 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 5 Speed Extended Cab Pickup
  Added Mar 2024 • 5 Fuel-ups

  Property of Aeillustration

• 11.0 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD WT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jul 2015 • 260 Fuel-ups

  Property of gaskippy

• 13.5 Avg MPG

• Ryan's Truck

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 5 Speed
  Added Mar 2017 • 355 Fuel-ups

  Property of rfoster

• 10.8 Avg MPG

• Tritnee

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2024 • 22 Fuel-ups

  Property of Lord_Commander

• 15.9 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2017 • 358 Fuel-ups

  Property of HomerDMAX

• 16.4 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2023 • 71 Fuel-ups

  Property of joesauto24

• 13.9 Avg MPG

• LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2023 • 15 Fuel-ups

  Property of schra644

• 12.9 Avg MPG

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