Based on data from 114 vehicles, 13,176 fuel-ups and 3,279,545 miles of driving, the 2006 GMC Sierra 2500 HD gets a combined Avg MPG of 14.27 with a 0.05 MPG margin of error.

Any Engine Type 6.0L V8 GAS (20) 6.6L V8 DIESEL (85) 8.1L V8 GAS (1) V8 DIESEL (3) V8 GAS (3) Any Body Style Sport Utility (1) Extended Cab Pickup (5) Crew Cab Pickup (31) Any Submodel WT (5) SL (6) SLE (29) SLT (67) Other (7)

Below you can see a distribution of the fuel-ups with 436 outliers (3.20%) removed.

Following shows the average MPG of each of the 114 vehicles in the system.

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• Duramax 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2022 • 387 Fuel-ups

  Property of awesomeamerican

• 15.8 Avg MPG

• Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 192 Fuel-ups

  Property of bsneed

• 15.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2023 • 49 Fuel-ups

  Property of joesauto24

• 14.0 Avg MPG

• 2006 Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2021 • 152 Fuel-ups

  Property of dillyboy

• 15.7 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 • 648 Fuel-ups

  Property of tkemo648

• 16.2 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added May 2022 • 50 Fuel-ups

  Property of theminthawk

• 11.4 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2022 • 83 Fuel-ups

  Property of sixsix_tom

• 15.2 Avg MPG

• 04 Yukon XL LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Sport Utility
  Added Mar 2018 • 263 Fuel-ups

  Property of jamisondonato

• 14.9 Avg MPG

• GMC

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 419 Fuel-ups

  Property of BlueyZassoff

• 14.3 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Feb 2017 • 330 Fuel-ups

  Property of HomerDMAX

• 16.3 Avg MPG

• DirtyMax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added May 2019 • 110 Fuel-ups

  Property of polarisn1

• 15.2 Avg MPG

• Red Solo Truck

  2006 GMC Sierra 2500 HD Custom Submodel V8 DIESEL
  Added Jun 2012 • 180 Fuel-ups

  Property of helmet

• 15.8 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SL 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2023 • 36 Fuel-ups

  Property of Andrew03

• 13.5 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2017 • 393 Fuel-ups

  Property of PrestonL

• 14.6 Avg MPG

• 2500HD

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 467 Fuel-ups

  Property of hummingbird63012

• 15.2 Avg MPG

• VEH-016

  2006 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jan 2023 • 60 Fuel-ups

  Property of bentleylandscape

• 9.5 Avg MPG

• 2006 Duramax

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 254 Fuel-ups

  Property of oskam6

• 14.1 Avg MPG

• My Sierra 2500 HD

  2006 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed
  Added Sep 2022 • 78 Fuel-ups

  Property of firedave654

• 9.9 Avg MPG

• 06lly (Imported

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Feb 2019 • 598 Fuel-ups

  Property of Dleamon84

• 14.6 Avg MPG

• LBZ

  2006 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jan 2021 • 64 Fuel-ups

  Property of rarotary

• 15.3 Avg MPG

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