Based on data from 207 vehicles, 21,104 fuel-ups and 6,160,139 miles of driving, the 2015 GMC Sierra 1500 gets a combined Avg MPG of 15.78 with a 0.05 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (13) 5.3L V8 FLEX (44) 5.3L V8 GAS (107) 6.2L V8 GAS (40) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (25) Crew Cab Pickup (65) Any Submodel Base (14) Denali (35) SLE (60) SLT (95) Other (3)

Below you can see a distribution of the fuel-ups with 635 outliers (2.92%) removed.

Following shows the average MPG of each of the 207 vehicles in the system.

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• »

• Truck

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
  Added Jan 2023 • 3 Fuel-ups

  Property of fernwoodnation

• 13.4 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 292 Fuel-ups

  Property of dustin8201

• 14.8 Avg MPG

• GMC

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jul 2021 • 350 Fuel-ups

  Property of jarrett85

• 15.3 Avg MPG

• Da Kon

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2021 • 68 Fuel-ups

  Property of Tclechner

• 16.2 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2021 • 39 Fuel-ups

  Property of kyleiowa

• 15.9 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2019 • 246 Fuel-ups

  Property of CaptAbrahamSmollett

• 15.2 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 329 Fuel-ups

  Property of ssirik

• 14.7 Avg MPG

• Silver Surfer

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
  Added Apr 2016 • 335 Fuel-ups

  Property of humenfly

• 17.7 Avg MPG

• GMC Truck

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added May 2020 • 98 Fuel-ups

  Property of Chuck16785

• 17.2 Avg MPG

• Team Blue (Truck)

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Jan 2022 • 119 Fuel-ups

  Property of TeamBlue

• 16.1 Avg MPG

• GMC Sierra Denali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Aug 2016 • 345 Fuel-ups

  Property of mnetland

• 18.6 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2020 • 32 Fuel-ups

  Property of jc5570

• 15.6 Avg MPG

• 2015 GMC Sierra Crew Cab

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Oct 2016 • 272 Fuel-ups

  Property of dbowman711

• 15.8 Avg MPG

• BlueFishDogTooth III

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added May 2019 • 118 Fuel-ups

  Property of dennisp2938

• 12.5 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2018 • 313 Fuel-ups

  Property of Karels

• 17.1 Avg MPG

• GMC Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Aug 2017 • 212 Fuel-ups

  Property of eddykc03

• 15.5 Avg MPG

• Truck

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 201 Fuel-ups

  Property of kbreyette

• 15.2 Avg MPG

• Sierra All Terrain

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Jul 2015 • 213 Fuel-ups

  Property of Gilles

• 17.2 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2020 • 33 Fuel-ups

  Property of Selway

• 16.8 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Nov 2018 • 508 Fuel-ups

  Property of CStreff

• 18.1 Avg MPG

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• »