Based on data from 75 vehicles, 4,932 fuel-ups and 1,478,759 miles of driving, the 2012 GMC Sierra 1500 gets a combined Avg MPG of 15.10 with a 0.08 MPG margin of error.

Any Engine Type 4.8L V8 FLEX (7) 5.3L V8 FLEX (46) 6.2L V8 FLEX (10) GAS (1) V6 GAS (1) V8 FLEX (8) Any Body Style Extended Cab Pickup (7) Crew Cab Pickup (16) Any Submodel SL (4) Denali (5) SLT (18) SLE (38) Other (10)

Below you can see a distribution of the fuel-ups with 179 outliers (3.50%) removed.

Following shows the average MPG of each of the 75 vehicles in the system.

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• 2012 GMC Sierra

  2012 GMC Sierra 1500 SLE 4.8L V8 FLEX Automatic 4 Speed Extended Cab Pickup
  Added Feb 2017 • 23 Fuel-ups

  Property of wildwolf1486

• 15.9 Avg MPG

• 2012 Sierra

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 16 Fuel-ups

  Property of jacksdogs

• 17.6 Avg MPG

• My Sierra 1500

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2016 • 77 Fuel-ups

  Property of hawk293

• 12.8 Avg MPG

• My Sierra 1500

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Aug 2017 • 32 Fuel-ups

  Property of mark2889

• 17.3 Avg MPG

• My Sierra 1500

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2017 • 8 Fuel-ups

  Property of txfishing

• 11.7 Avg MPG

• Big Red

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Jun 2016 • 117 Fuel-ups

  Property of nosignal

• 14.3 Avg MPG

• My Sierra 1500

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2019 • 9 Fuel-ups

  Property of presto86

• 4.9 Avg MPG

• 2012 Sierra Noir

  2012 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2017 • 48 Fuel-ups

  Property of MFamily

• 17.8 Avg MPG

• Truck

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2019 • 67 Fuel-ups

  Property of mjarena

• 18.3 Avg MPG

• My Sierra 1500

  2012 GMC Sierra 1500 SLE 4.8L V8 FLEX Automatic 4 Speed
  Added Apr 2017 • 5 Fuel-ups

  Property of mikeriverdrive

• 16.0 Avg MPG

• GMC Sierra

  2012 GMC Sierra 1500 SLE 6.2L V8 FLEX Automatic 4 Speed
  Added Mar 2017 • 124 Fuel-ups

  Property of TxTiger1962

• 15.5 Avg MPG

• Truck

  2012 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2013 • 43 Fuel-ups

  Property of Travinder

• 13.8 Avg MPG

• Sierra 1500

  2012 GMC Sierra 1500 SLE 6.2L V8 FLEX Automatic 6 Speed
  Added Sep 2015 • 4 Fuel-ups

  Property of Oaks

• 14.9 Avg MPG

• My Sierra 1500

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2015 • 5 Fuel-ups

  Property of isanchez315

• 12.4 Avg MPG

• Truck

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 4 Speed Crew Cab Pickup
  Added Sep 2015 • 9 Fuel-ups

  Property of Brekelmans

• 16.2 Avg MPG

• Woody Truck

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2015 • 4 Fuel-ups

  Property of Woody23

• 14.5 Avg MPG

• My Sierra 1500

  2012 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2015 • 65 Fuel-ups

  Property of Jake45

• 15.3 Avg MPG

• Sierra 1500

  2012 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Jul 2015 • 4 Fuel-ups

  Property of bjboucher

• 15.2 Avg MPG

• Sierra

  2012 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2015 • 24 Fuel-ups

  Property of GodFather2u

• 13.3 Avg MPG

• My Sierra 1500

  2012 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Mar 2015 • 11 Fuel-ups

  Property of SubaChevy

• 11.8 Avg MPG

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