Based on data from 147 vehicles, 6,101 fuel-ups and 2,105,043 miles of driving, the 2020 GMC Sierra 1500 gets a combined Avg MPG of 18.76 with a 0.14 MPG margin of error.

Any Engine Type 2.7L L4 GAS (7) 3.0L L6 DIESEL (68) 4.3L V6 GAS (1) 5.3L V8 GAS (36) 6.2L V8 GAS (32) Any Body Style Extended Cab Pickup (2) Crew Cab Pickup (34) Any Submodel Base (2) SLE (10) Elevation (22) Denali (25) SLT (33) AT4 (55)

Below you can see a distribution of the fuel-ups with 45 outliers (0.73%) removed.

Following shows the average MPG of each of the 147 vehicles in the system.

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

• Gmc

  2020 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Apr 2020 • 112 Fuel-ups

  Property of Rustyg23

• 19.5 Avg MPG

• 2020 GMC Sierra

  2020 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Aug 2020 • 35 Fuel-ups

  Property of juneau76

• 24.2 Avg MPG

• Red Rover

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added May 2020 • 76 Fuel-ups

  Property of wondergeek

• 22.3 Avg MPG

• Sierra 1500

  2020 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed
  Added Oct 2020 • 58 Fuel-ups

  Property of pinkdream

• 16.1 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Nov 2020 • 86 Fuel-ups

  Property of vnatalizio

• 23.3 Avg MPG

• Denna

  2020 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed
  Added Dec 2020 • 46 Fuel-ups

  Property of knightbsandy

• 25.4 Avg MPG

• Sierra 1500 AT4

  2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Aug 2020 • 72 Fuel-ups

  Property of msteiner17

• 17.0 Avg MPG

• Sierra

  2020 GMC Sierra 1500 AT4 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Feb 2020 • 94 Fuel-ups

  Property of Bowtie76

• 14.7 Avg MPG

• Sierra

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Nov 2020 • 44 Fuel-ups

  Property of Griffith

• 21.2 Avg MPG

• 2020 GMC Sierra

  2020 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added Sep 2020 • 30 Fuel-ups

  Property of jndelisl

• 17.2 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Feb 2021 • 35 Fuel-ups

  Property of Nailer18

• 21.9 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Sep 2020 • 66 Fuel-ups

  Property of mbnereim

• 16.6 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 10 Speed
  Added Jan 2020 • 40 Fuel-ups

  Property of TigerDeAnn

• 17.6 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Oct 2020 • 45 Fuel-ups

  Property of SRolfe

• 25.8 Avg MPG

• AT4

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2020 • 46 Fuel-ups

  Property of riefej80

• 20.0 Avg MPG

• GMC Sierra

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Feb 2021 • 7 Fuel-ups

  Property of Larsan90

• 25.3 Avg MPG

• Sierra 1500

  2020 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added May 2020 • 99 Fuel-ups

  Property of Boatman744

• 16.1 Avg MPG

• AT4

  2020 GMC Sierra 1500 AT4 5.3L V8 GAS Automatic 10 Speed
  Added Aug 2020 • 57 Fuel-ups

  Property of Mocek

• 19.6 Avg MPG

• Duramax

  2020 GMC Sierra 1500 SLE 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Apr 2020 • 68 Fuel-ups

  Property of mattb5150

• 20.5 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Nov 2020 • 24 Fuel-ups

  Property of rbennett011

• 13.5 Avg MPG

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