Based on data from 89 vehicles, 4,372 fuel-ups and 1,252,170 miles of driving, the 2004 GMC Sierra 1500 gets a combined Avg MPG of 14.13 with a 0.08 MPG margin of error.

Any Engine Type 4.3L V6 GAS (9) 4.8L V8 GAS (6) 5.3L V8 FLEX (4) 5.3L V8 GAS (51) 6.0L V8 GAS (3) GAS (1) V6 GAS (1) V8 GAS (10) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (15) Crew Cab Pickup (3) Extended Crew Cab Pickup (2) Any Submodel WT (3) Denali (3) Base (9) SLT (18) SLE (42) Other (14)

Below you can see a distribution of the fuel-ups with 180 outliers (3.95%) removed.

Following shows the average MPG of each of the 89 vehicles in the system.

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• GMC

  2004 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 4 Speed Extended Cab Pickup
  Added Dec 2020 • 49 Fuel-ups

  Property of offroad

• 16.2 Avg MPG

• Earl

  2004 GMC Sierra 1500 5.3L V8 FLEX Automatic 4 Speed Extended Cab Pickup
  Added Mar 2023 • 5 Fuel-ups

  Property of 5_Slow

• 14.3 Avg MPG

• Dallas

  2004 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed Extended Cab Pickup
  Added Jun 2019 • 152 Fuel-ups

  Property of techteacher34

• 16.1 Avg MPG

• 2004 GMC 1500

  2004 GMC Sierra 1500 4.3L V6 GAS Manual 5 Speed
  Added Sep 2021 • 43 Fuel-ups

  Property of racerx146

• 16.2 Avg MPG

• GMC

  2004 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Feb 2023 • 14 Fuel-ups

  Property of 03zf6

• 13.6 Avg MPG

• My Sierra 1500

  2004 GMC Sierra 1500 SLT 4.3L V6 GAS Automatic 4 Speed
  Added Jan 2018 • 80 Fuel-ups

  Property of nunnally

• 13.5 Avg MPG

• Krusty

  2004 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added May 2023 • 3 Fuel-ups

  Property of scwerm

• 17.2 Avg MPG

• GMC Sierra 1500 4.3 V6

  2004 GMC Sierra 1500 4.3L V6 GAS Automatic 4 Speed
  Added Mar 2023 • 6 Fuel-ups

  Property of mrhank

• 14.7 Avg MPG

• My Sierra 1500

  2004 GMC Sierra 1500 SLE 4.8L V8 GAS Automatic 4 Speed
  Added Sep 2021 • 23 Fuel-ups

  Property of scampbell32

• 14.0 Avg MPG

• My Sierra 1500

  2004 GMC Sierra 1500 5.3L V8 GAS Automatic 4 Speed
  Added Apr 2021 • 123 Fuel-ups

  Property of BryceW34

• 12.4 Avg MPG

• My Sierra 1500

  2004 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Sep 2018 • 157 Fuel-ups

  Property of joe___hill

• 12.7 Avg MPG

• My Sierra 1500

  2004 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Apr 2022 • 61 Fuel-ups

  Property of Spitfire77

• 16.1 Avg MPG

• E-B Hauler

  2004 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added May 2019 • 51 Fuel-ups

  Property of Homeden2

• 14.0 Avg MPG

• Sierra 1500

  2004 GMC Sierra 1500 5.3L V8 GAS Automatic 4 Speed
  Added Sep 2021 • 48 Fuel-ups

  Property of Twise

• 14.5 Avg MPG

• Sierra 1500

  2004 GMC Sierra 1500 WT 4.8L V8 GAS Automatic 4 Speed
  Added Apr 2019 • 40 Fuel-ups

  Property of michaelj20

• 14.0 Avg MPG

• Big Red

  2004 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Sep 2016 • 93 Fuel-ups

  Property of Tibbs

• 12.9 Avg MPG

• 04 Sierra 1500

  2004 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Dec 2022 • 8 Fuel-ups

  Property of Adrock126

• 13.4 Avg MPG

• Z71

  2004 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 4 Speed Crew Cab Pickup
  Added Feb 2019 • 200 Fuel-ups

  Property of Judsonm28

• 13.3 Avg MPG

• Old Truck

  2004 GMC Sierra 1500 SLT
  Added May 2018 • 109 Fuel-ups

  Property of offroad

• 14.8 Avg MPG

• Jeff's Truck

  2004 GMC Sierra 1500 Denali 6.0L V8 GAS Automatic 4 Speed Extended Cab Pickup
  Added Oct 2017 • 16 Fuel-ups

  Property of wade429

• 17.2 Avg MPG

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