Based on data from 200 vehicles, 18,987 fuel-ups and 5,591,677 miles of driving, the 2015 GMC Sierra 1500 gets a combined Avg MPG of 15.81 with a 0.05 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (14) 5.3L V8 FLEX (44) 5.3L V8 GAS (101) 6.2L V8 GAS (38) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (22) Crew Cab Pickup (64) Any Submodel Base (13) Denali (33) SLE (59) SLT (92) Other (3)

Below you can see a distribution of the fuel-ups with 555 outliers (2.84%) removed.

Following shows the average MPG of each of the 200 vehicles in the system.

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• »

• Sierra

  2015 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
  Added Nov 2019 • 263 Fuel-ups

  Property of McCartney

• 15.3 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Feb 2018 • 106 Fuel-ups

  Property of Hash59

• 17.5 Avg MPG

• BlueFishDogTooth III

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added May 2019 • 78 Fuel-ups

  Property of dennisp2938

• 13.0 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Nov 2018 • 427 Fuel-ups

  Property of CStreff

• 18.1 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Nov 2019 • 44 Fuel-ups

  Property of Musang

• 15.2 Avg MPG

• 15 GMC Sierra 1500 Denali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Oct 2019 • 140 Fuel-ups

  Property of HoustonC

• 15.4 Avg MPG

• Denali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Mar 2017 • 176 Fuel-ups

  Property of giro

• 15.6 Avg MPG

• Truck

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 304 Fuel-ups

  Property of Dukesask

• 14.8 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 197 Fuel-ups

  Property of dustin8201

• 14.9 Avg MPG

• Truck

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 132 Fuel-ups

  Property of kbreyette

• 15.3 Avg MPG

• GMC Truck

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added May 2020 • 37 Fuel-ups

  Property of Chuck16785

• 17.3 Avg MPG

• GMC Sierra Denali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Aug 2016 • 283 Fuel-ups

  Property of mnetland

• 18.7 Avg MPG

• 2015 GMC

  2015 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
  Added Sep 2016 • 211 Fuel-ups

  Property of bluez06

• 15.3 Avg MPG

• GMC Sierra

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Nov 2020 • 143 Fuel-ups

  Property of glennm66

• 14.4 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2019 • 148 Fuel-ups

  Property of CaptAbrahamSmollett

• 15.3 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2017 • 193 Fuel-ups

  Property of rguerrer93

• 16.4 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2018 • 215 Fuel-ups

  Property of Karels

• 16.9 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 241 Fuel-ups

  Property of ssirik

• 14.5 Avg MPG

• Sierra All Terrain

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Jul 2015 • 167 Fuel-ups

  Property of Gilles

• 17.4 Avg MPG

• GMC 1500 SLT

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2019 • 65 Fuel-ups

  Property of slatejoh

• 16.0 Avg MPG

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• »