Based on data from 117 vehicles, 13,560 fuel-ups and 3,382,715 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 471 outliers (3.36%) removed.

Following shows the average MPG of each of the 117 vehicles in the system.

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• Gmc

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Dec 2020 • 38 Fuel-ups

  Property of brentah272

• 11.0 Avg MPG

• Old GMC

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jul 2018 • 23 Fuel-ups

  Property of melissachaplin

• 15.3 Avg MPG

• 2006 Duramax

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2021 • 210 Fuel-ups

  Property of JarrettR

• 12.0 Avg MPG

• 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 106 Fuel-ups

  Property of Overmann

• 14.5 Avg MPG

• Beast

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 59 Fuel-ups

  Property of ldrosenbalm

• 14.3 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2017 • 556 Fuel-ups

  Property of sierraduramaxdan

• 14.7 Avg MPG

• LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2020 • 42 Fuel-ups

  Property of WallStreet

• 14.0 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 5 Speed
  Added Mar 2020 • 8 Fuel-ups

  Property of billresa

• 7.6 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Feb 2022 • 11 Fuel-ups

  Property of Thomasdean514

• 13.8 Avg MPG

• Truck

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed Extended Cab Pickup
  Added Apr 2015 • 131 Fuel-ups

  Property of EM101

• 16.0 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added Oct 2020 • 13 Fuel-ups

  Property of TJLong1121

• 10.1 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jul 2019 • 6 Fuel-ups

  Property of clayerfo

• 10.3 Avg MPG

• Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2018 • 119 Fuel-ups

  Property of eschmidt12

• 14.8 Avg MPG

• 2500

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jul 2018 • 81 Fuel-ups

  Property of Mjo36957

• 15.4 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2019 • 15 Fuel-ups

  Property of kloepfer

• 13.4 Avg MPG

• Tough guy

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 449 Fuel-ups

  Property of cheddr

• 15.8 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added Apr 2019 • 26 Fuel-ups

  Property of tema

• 14.3 Avg MPG

• Sully

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Jan 2019 • 26 Fuel-ups

  Property of SkalkahoStables

• 15.3 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2019 • 74 Fuel-ups

  Property of benzvw

• 16.4 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2014 • 3 Fuel-ups

  Property of mdsmith95

• 13.4 Avg MPG

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