Based on data from 207 vehicles, 20,265 fuel-ups and 5,931,555 miles of driving, the 2015 GMC Sierra 1500 gets a combined Avg MPG of 15.80 with a 0.05 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (13) 5.3L V8 FLEX (45) 5.3L V8 GAS (105) 6.2L V8 GAS (41) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (24) Crew Cab Pickup (66) Any Submodel Base (14) Denali (36) SLE (59) SLT (95) Other (3)

Below you can see a distribution of the fuel-ups with 615 outliers (2.95%) 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
• »

• Team Blue (Truck)

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Jan 2022 • 62 Fuel-ups

  Property of TeamBlue

• 16.3 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Feb 2022 • 32 Fuel-ups

  Property of amumcgann

• 17.1 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Jun 2022 • 5 Fuel-ups

  Property of abby1127

• 19.6 Avg MPG

• Truck

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 176 Fuel-ups

  Property of kbreyette

• 15.2 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 6 Speed
  Added Aug 2021 • 15 Fuel-ups

  Property of Colton1500

• 13.7 Avg MPG

• Joey's GMC

  2015 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
  Added Sep 2016 • 217 Fuel-ups

  Property of Shakora

• 13.9 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 283 Fuel-ups

  Property of dgrule

• 16.4 Avg MPG

• My Sierra 1500

  2015 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Nov 2019 • 69 Fuel-ups

  Property of Musang

• 15.1 Avg MPG

• Denali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Mar 2017 • 197 Fuel-ups

  Property of giro

• 15.6 Avg MPG

• GMC Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Aug 2017 • 193 Fuel-ups

  Property of eddykc03

• 15.6 Avg MPG

• GMC 1500 Crew

  2015 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Mar 2019 • 118 Fuel-ups

  Property of wingbase

• 12.4 Avg MPG

• Sierra

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 293 Fuel-ups

  Property of ssirik

• 14.5 Avg MPG

• Sierra 1500

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added May 2020 • 116 Fuel-ups

  Property of jurbin

• 16.1 Avg MPG

• Silver Surfer

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
  Added Apr 2016 • 315 Fuel-ups

  Property of humenfly

• 17.8 Avg MPG

• GMC Truck

  2015 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added May 2020 • 74 Fuel-ups

  Property of Chuck16785

• 17.2 Avg MPG

• GMC Sierra Denali

  2015 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Aug 2016 • 315 Fuel-ups

  Property of mnetland

• 18.6 Avg MPG

• 2015 GMC Sierra 1500 SLT

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2018 • 243 Fuel-ups

  Property of mnvik28

• 14.5 Avg MPG

• Da Kon

  2015 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2021 • 45 Fuel-ups

  Property of Tclechner

• 16.7 Avg MPG

• GMC

  2015 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jul 2021 • 328 Fuel-ups

  Property of jarrett85

• 15.4 Avg MPG

• 2015 GMC Sierra Crew Cab

  2015 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Oct 2016 • 240 Fuel-ups

  Property of dbowman711

• 15.7 Avg MPG

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