Based on data from 119 vehicles, 13,971 fuel-ups and 3,489,882 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 483 outliers (3.34%) removed.

Following shows the average MPG of each of the 119 vehicles in the system.

• «
• 1
• 2
• 3
• 4
• 5
• 6
• »

• LB Zed

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 51 Fuel-ups

  Property of Wdoc

• 15.0 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD WT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jul 2015 • 265 Fuel-ups

  Property of gaskippy

• 13.4 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed
  Added Sep 2022 • 122 Fuel-ups

  Property of firedave654

• 10.2 Avg MPG

• Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 214 Fuel-ups

  Property of bsneed

• 15.3 Avg MPG

• Betsy

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2021 • 32 Fuel-ups

  Property of carpkid805

• 17.7 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2022 • 118 Fuel-ups

  Property of sixsix_tom

• 15.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added May 2022 • 93 Fuel-ups

  Property of theminthawk

• 11.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2023 • 101 Fuel-ups

  Property of Andrew03

• 13.9 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 • 704 Fuel-ups

  Property of tkemo648

• 16.1 Avg MPG

• Decal Truck

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jun 2018 • 14 Fuel-ups

  Property of Decalman

• 13.7 Avg MPG

• Big Red

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2024 • 16 Fuel-ups

  Property of masseyk

• 11.0 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2025 • 136 Fuel-ups

  Property of benzvw

• 16.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2017 • 427 Fuel-ups

  Property of PrestonL

• 14.4 Avg MPG

• VEH-016

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jan 2023 • 122 Fuel-ups

  Property of bentleylandscape

• 9.5 Avg MPG

• Brett's Truck

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 244 Fuel-ups

  Property of bgarner6581

• 14.8 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2023 • 76 Fuel-ups

  Property of joesauto24

• 13.8 Avg MPG

• 2006 Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2021 • 209 Fuel-ups

  Property of dillyboy

• 15.9 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2017 • 364 Fuel-ups

  Property of HomerDMAX

• 16.4 Avg MPG

• Duramax 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2022 • 421 Fuel-ups

  Property of awesomeamerican

• 16.3 Avg MPG

• Tritnee

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2024 • 32 Fuel-ups

  Property of Lord_Commander

• 15.6 Avg MPG

• «
• 1
• 2
• 3
• 4
• 5
• 6
• »