Based on data from 192 vehicles, 15,374 fuel-ups and 5,067,168 miles of driving, the 2020 GMC Sierra 1500 gets a combined Avg MPG of 18.23 with a 0.08 MPG margin of error.

Any Engine Type 2.7L L4 GAS (9) 3.0L L6 DIESEL (85) 4.3L V6 GAS (1) 5.3L V8 GAS (52) 6.2L V8 GAS (42) Any Body Style Extended Cab Pickup (3) Crew Cab Pickup (46) Any Submodel Base (3) SLE (10) Elevation (26) Denali (38) SLT (45) AT4 (70)

Below you can see a distribution of the fuel-ups with 348 outliers (2.21%) removed.

Following shows the average MPG of each of the 192 vehicles in the system.

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

• My Sierra 1500

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Oct 2020 • 170 Fuel-ups

  Property of surfintx2004

• 19.9 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
  Added Feb 2023 • 116 Fuel-ups

  Property of jwbraam3

• 16.4 Avg MPG

• AT4

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2020 • 168 Fuel-ups

  Property of riefej80

• 19.9 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Apr 2020 • 295 Fuel-ups

  Property of GRCubsfan

• 17.0 Avg MPG

• 2020 Sierra

  2020 GMC Sierra 1500 Elevation 2.7L L4 GAS Automatic 8 Speed Extended Cab Pickup
  Added Feb 2020 • 259 Fuel-ups

  Property of jamesthebikeguy

• 19.6 Avg MPG

• Sierra Denali 1500

  2020 GMC Sierra 1500 Denali 3.0L L6 DIESEL Automatic 8 Speed
  Added Jul 2023 • 16 Fuel-ups

  Property of kcazatk_1

• 24.4 Avg MPG

• 2020 Sierra 1500

  2020 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2020 • 173 Fuel-ups

  Property of msova2

• 15.3 Avg MPG

• Sierra 1500 AT4

  2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Aug 2020 • 241 Fuel-ups

  Property of msteiner17

• 17.0 Avg MPG

• HUNK

  2020 GMC Sierra 1500 Elevation 5.3L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Apr 2021 • 95 Fuel-ups

  Property of Smokeetr

• 18.9 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed
  Added May 2024 • 15 Fuel-ups

  Property of kim98642

• 14.6 Avg MPG

• Pretty Ass Red Sierra 1500

  2020 GMC Sierra 1500 Elevation 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Jul 2020 • 98 Fuel-ups

  Property of BrianK

• 24.7 Avg MPG

• Duramax

  2020 GMC Sierra 1500 SLE 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Apr 2020 • 163 Fuel-ups

  Property of mattb5150

• 19.5 Avg MPG

• 2020 GMC Sierra

  2020 GMC Sierra 1500 Elevation 5.3L V8 GAS Crew Cab Pickup
  Added Dec 2023 • 37 Fuel-ups

  Property of cmore

• 17.5 Avg MPG

• GMC Sierra 1500

  2020 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 10 Speed Crew Cab Pickup
  Added Feb 2021 • 245 Fuel-ups

  Property of mcsgary

• 18.9 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 10 Speed
  Added Jun 2022 • 125 Fuel-ups

  Property of nicktcr

• 19.4 Avg MPG

• Sierra

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed Crew Cab Pickup
  Added Nov 2020 • 152 Fuel-ups

  Property of Griffith

• 22.9 Avg MPG

• GMC Sierra 1500 AT4

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Jul 2020 • 182 Fuel-ups

  Property of Knoname

• 20.0 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 AT4 6.2L V8 GAS Automatic 10 Speed
  Added Oct 2020 • 161 Fuel-ups

  Property of mcginnmf16

• 15.2 Avg MPG

• My Sierra 1500

  2020 GMC Sierra 1500 AT4 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2020 • 137 Fuel-ups

  Property of jessemfa

• 23.1 Avg MPG

• Maxine

  2020 GMC Sierra 1500 SLT 3.0L L6 DIESEL Automatic 10 Speed
  Added Aug 2020 • 214 Fuel-ups

  Property of ItsMine

• 24.0 Avg MPG

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