Based on data from 118 vehicles, 13,755 fuel-ups and 3,432,902 miles of driving, the 2006 GMC Sierra 2500 HD gets a combined Avg MPG of 14.24 with a 0.05 MPG margin of error.

Any Engine Type 6.0L V8 GAS (22) 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 (69) Other (7)

Below you can see a distribution of the fuel-ups with 474 outliers (3.33%) removed.

Following shows the average MPG of each of the 118 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 Aug 2017 • 425 Fuel-ups

  Property of PrestonL

• 14.4 Avg MPG

• LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jan 2021 • 77 Fuel-ups

  Property of rarotary

• 15.2 Avg MPG

• DirtyMax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2019 • 117 Fuel-ups

  Property of polarisn1

• 15.3 Avg MPG

• Patrick 3.0

  2006 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 5 Speed Extended Cab Pickup
  Added Mar 2024 • 7 Fuel-ups

  Property of Aeillustration

• 11.0 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added May 2022 • 89 Fuel-ups

  Property of theminthawk

• 11.5 Avg MPG

• Betsy

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added May 2021 • 30 Fuel-ups

  Property of carpkid805

• 17.7 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 5 Speed
  Added Dec 2024 • 4 Fuel-ups

  Property of Lestat1243

• 15.1 Avg MPG

• GMC 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 264 Fuel-ups

  Property of xds

• 14.1 Avg MPG

• Brett's Truck

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 242 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 • 74 Fuel-ups

  Property of joesauto24

• 13.9 Avg MPG

• VEH-016

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jan 2023 • 116 Fuel-ups

  Property of bentleylandscape

• 9.5 Avg MPG

• Quiv

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2017 • 276 Fuel-ups

  Property of JordanTr

• 16.1 Avg MPG

• 2006 Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 274 Fuel-ups

  Property of oskam6

• 14.0 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

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2023 • 91 Fuel-ups

  Property of Andrew03

• 14.1 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

• Truck

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Dec 2018 • 76 Fuel-ups

  Property of Hagfan72

• 10.2 Avg MPG

• LB Zed

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 50 Fuel-ups

  Property of Wdoc

• 15.0 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2023 • 10 Fuel-ups

  Property of jkelleher22

• 13.8 Avg MPG

• 06lly (Imported

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 608 Fuel-ups

  Property of Dleamon84

• 14.6 Avg MPG

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