Based on data from 123 vehicles, 10,580 fuel-ups and 3,136,669 miles of driving, the 2011 GMC Sierra 1500 gets a combined Avg MPG of 15.27 with a 0.06 MPG margin of error.

Any Engine Type 4.3L V6 GAS (2) 4.8L V8 FLEX (13) 5.3L V8 FLEX (64) 6.2L V8 FLEX (16) GAS (1) V6 GAS (2) V8 FLEX (11) V8 GAS (7) Any Body Style Standard Cab Pickup (4) Extended Cab Pickup (13) Crew Cab Pickup (19) Cab & Chassis - Crew Cab (1) Any Submodel WT (5) SL (9) Denali (10) SLT (22) SLE (52) Other (25)

Below you can see a distribution of the fuel-ups with 827 outliers (7.25%) removed.

Following shows the average MPG of each of the 123 vehicles in the system.

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• GMC Sierra 4x4

  2011 GMC Sierra 1500 FLEX V8
  Added Jan 2014 • 15 Fuel-ups

  Property of P1delboy

• 16.2 Avg MPG

• GMC Denali

  2011 GMC Sierra 1500 GAS V8
  Added May 2014 • 10 Fuel-ups

  Property of bigbud500

• 15.7 Avg MPG

• Sierra SLT

  2011 GMC Sierra 1500 GAS V8
  Added Apr 2011 • 91 Fuel-ups

  Property of Path07

• 14.7 Avg MPG

• GMC

  2011 GMC Sierra 1500 FLEX V8
  Added Aug 2013 • 34 Fuel-ups

  Property of Murph22083

• 12.0 Avg MPG

• dont use

  2011 GMC Sierra 1500
  Added Jan 2020 • 127 Fuel-ups

  Property of paultbear

• 69.1 Avg MPG

• Sierra

  2011 GMC Sierra 1500 GAS V8
  Added Feb 2014 • 127 Fuel-ups

  Property of paultercier

• 18.3 Avg MPG

• dont use

  2011 GMC Sierra 1500
  Added Jan 2020 • 127 Fuel-ups

  Property of paultbear

• 69.1 Avg MPG

• Sierra

  2011 GMC Sierra 1500
  Added Oct 2018 • 127 Fuel-ups

  Property of paultercier

• 69.1 Avg MPG

• My Sierra

  2011 GMC Sierra 1500 FLEX V8
  Added Nov 2013 • 10 Fuel-ups

  Property of atsmall127

• 15.8 Avg MPG

• Betty

  2011 GMC Sierra 1500
  Added Sep 2013 • 9 Fuel-ups

  Property of wdukes12

• 14.6 Avg MPG

• 2012 GMC Sierra

  2011 GMC Sierra 1500 GAS V8
  Added Oct 2013 • 6 Fuel-ups

  Property of unclebutch41

• 16.9 Avg MPG

• Truck

  2011 GMC Sierra 1500 GAS V8
  Added Apr 2013 • 12 Fuel-ups

  Property of Traxx

• 17.4 Avg MPG

• 11 Sierra

  2011 GMC Sierra 1500 GAS
  Added Jun 2011 • 59 Fuel-ups

  Property of Stonecutter099

• 12.3 Avg MPG

• Truck

  2011 GMC Sierra 1500 FLEX V8
  Added Feb 2012 • 34 Fuel-ups

  Property of slecrew

• 16.4 Avg MPG

• Sierra

  2011 GMC Sierra 1500 FLEX V8
  Added Sep 2012 • 4 Fuel-ups

  Property of kjhunt2

• 16.6 Avg MPG

• GMC Sierra

  2011 GMC Sierra 1500 FLEX V8
  Added Aug 2012 • 7 Fuel-ups

  Property of supermanotorious

• 14.9 Avg MPG

• GMC Sierra

  2011 GMC Sierra 1500 GAS V6
  Added Apr 2011 • 3 Fuel-ups

  Property of Pknitty86

• 13.7 Avg MPG

• Sierra

  2011 GMC Sierra 1500 FLEX V8
  Added Dec 2011 • 8 Fuel-ups

  Property of conepunter

• 14.9 Avg MPG

• Ext Cab 4x4 5.3L BFG ATs

  2011 GMC Sierra 1500 FLEX V8
  Added Mar 2012 • 7 Fuel-ups

  Property of mikehood

• 14.9 Avg MPG

• White GMC

  2011 GMC Sierra 1500 GAS V8
  Added Nov 2011 • 9 Fuel-ups

  Property of beardsley

• 11.8 Avg MPG

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