Based on data from 59 vehicles, 5,870 fuel-ups and 1,952,608 miles of driving, the 2017 GMC Sierra 2500 HD gets a combined Avg MPG of 13.32 with a 0.09 MPG margin of error.

Any Engine Type 6.0L V8 FLEX (12) 6.6L V8 DIESEL (47) Any Body Style Crew Cab Pickup (10) Sport Utility (1) Any Submodel Base (4) SLE (5) SLT (13) Denali (37)

Below you can see a distribution of the fuel-ups with 100 outliers (1.68%) removed.

Following shows the average MPG of each of the 59 vehicles in the system.

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• Sierra 2500 HD

  2017 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed
  Added Jul 2024 • 28 Fuel-ups

  Property of xmtbiker

• 11.2 Avg MPG

• My Sierra 2500 HD

  2017 GMC Sierra 2500 HD 6.0L V8 FLEX Automatic 6 Speed
  Added Aug 2021 • 170 Fuel-ups

  Property of zap_25

• 11.0 Avg MPG

• 2017 Sierra 2500 HD

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2019 • 73 Fuel-ups

  Property of TheDon81

• 14.3 Avg MPG

• My Sierra 2500 HD

  2017 GMC Sierra 2500 HD 6.0L V8 FLEX Automatic 6 Speed
  Added Nov 2025 • 16 Fuel-ups

  Property of Robert30

• 11.6 Avg MPG

• 2017 Sierra 2500 HD

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2017 • 433 Fuel-ups

  Property of crjones

• 13.6 Avg MPG

• My Sierra 2500 HD

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2017 • 544 Fuel-ups

  Property of Paul303

• 15.2 Avg MPG

• Hellgate Wind

  2017 GMC Sierra 2500 HD 6.0L V8 FLEX Automatic 6 Speed
  Added Sep 2021 • 151 Fuel-ups

  Property of Moynaclan

• 11.4 Avg MPG

• My Sierra 2500 HD

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2025 • 35 Fuel-ups

  Property of stephen516

• 17.9 Avg MPG

• My Sierra 2500 HD

  2017 GMC Sierra 2500 HD 6.0L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • 530 Fuel-ups

  Property of brianjkmorgan

• 12.4 Avg MPG

• 2017 Sierra 2500 HD

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jun 2021 • 55 Fuel-ups

  Property of russman27

• 16.2 Avg MPG

• BMax HD

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Sport Utility
  Added Apr 2017 • 137 Fuel-ups

  Property of CowboyX5D

• 13.3 Avg MPG

• Sierra 2500 HD Denali

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Nov 2019 • 201 Fuel-ups

  Property of ellisjte

• 13.3 Avg MPG

• Max

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Jun 2021 • 87 Fuel-ups

  Property of harleydude63

• 12.8 Avg MPG

• Sierra Denali 2017

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Jun 2019 • 115 Fuel-ups

  Property of jp0590

• 14.6 Avg MPG

• Ed's GMC 2500HD Deinali Club Cab

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Apr 2017 • 250 Fuel-ups

  Property of HntngTrout

• 12.5 Avg MPG

• 2017 GMC Sierra 2500 HD

  2017 GMC Sierra 2500 HD SLT 6.0L V8 FLEX Automatic 6 Speed
  Added May 2023 • 106 Fuel-ups

  Property of hockeyguy22

• 11.8 Avg MPG

• My Sierra 2500 HD

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Mar 2017 • 132 Fuel-ups

  Property of harper17

• 13.5 Avg MPG

• My Sierra 2500 HD

  2017 GMC Sierra 2500 HD Denali 6.0L V8 FLEX Automatic 6 Speed
  Added Sep 2021 • 68 Fuel-ups

  Property of rbeelee

• 12.3 Avg MPG

• Denali Duramax

  2017 GMC Sierra 2500 HD Denali 6.6L V8 DIESEL Automatic 6 Speed
  Added Dec 2021 • 93 Fuel-ups

  Property of Neely25

• 16.8 Avg MPG

• L5P

  2017 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Oct 2023 • 61 Fuel-ups

  Property of lbzduramaxvt

• 15.4 Avg MPG

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