Based on data from 180 vehicles, 14,620 fuel-ups and 4,139,150 miles of driving, the 2018 GMC Sierra 1500 gets a combined Avg MPG of 16.02 with a 0.06 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (6) 5.3L V8 ELECTRIC/GAS (10) 5.3L V8 FLEX (25) 5.3L V8 GAS (88) 6.2L V8 GAS (50) Any Body Style Standard Cab Pickup (4) Extended Cab Pickup (9) Crew Cab Pickup (51) Any Submodel Base (11) SLE (25) Denali (35) SLT (109)

Below you can see a distribution of the fuel-ups with 213 outliers (1.44%) removed.

Following shows the average MPG of each of the 180 vehicles in the system.

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

• Jimmy

  2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
  Added Jan 2018 • 170 Fuel-ups

  Property of cowpen

• 19.1 Avg MPG

• Rich's Truck

  2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
  Added Jul 2019 • 107 Fuel-ups

  Property of rcorning

• 18.1 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed
  Added Mar 2018 • 173 Fuel-ups

  Property of chilly0999

• 15.5 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
  Added Jun 2022 • 75 Fuel-ups

  Property of sierradenali6-2

• 13.9 Avg MPG

• Big Red Eskimo

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Nov 2021 • 139 Fuel-ups

  Property of rkfdwc1

• 15.3 Avg MPG

• 2018GMC SIERRA 4X4

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
  Added Feb 2020 • 73 Fuel-ups

  Property of jjz3

• 18.9 Avg MPG

• 2018 GMC Sierra

  2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2018 • 165 Fuel-ups

  Property of bgrinder90

• 14.1 Avg MPG

• Denali

  2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
  Added Jan 2018 • 321 Fuel-ups

  Property of Godofwine7

• 16.0 Avg MPG

• 2018 GMC Sierra

  2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed Extended Cab Pickup
  Added May 2018 • 358 Fuel-ups

  Property of joenrox

• 16.6 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Dec 2018 • 232 Fuel-ups

  Property of e37292

• 16.9 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
  Added Jan 2020 • 114 Fuel-ups

  Property of retiredcb

• 18.9 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added Sep 2018 • 118 Fuel-ups

  Property of rinman

• 15.0 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added May 2018 • 165 Fuel-ups

  Property of wmdahler

• 17.2 Avg MPG

• GMC Sierra 1500

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added Jun 2018 • 256 Fuel-ups

  Property of Buckshot48

• 17.7 Avg MPG

• 2018 Sierra

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

  Property of gerickson24

• 14.0 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2018 • 181 Fuel-ups

  Property of rleitht

• 15.1 Avg MPG

• Rooster

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
  Added Mar 2019 • 100 Fuel-ups

  Property of x62605

• 17.4 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
  Added Oct 2019 • 231 Fuel-ups

  Property of iNative

• 15.6 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
  Added Sep 2018 • 281 Fuel-ups

  Property of Polar800

• 14.2 Avg MPG

• My Sierra 1500

  2018 GMC Sierra 1500 5.3L V8 GAS Automatic 6 Speed
  Added Oct 2022 • 137 Fuel-ups

  Property of Mstc

• 15.7 Avg MPG

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