Based on data from 71 vehicles, 6,742 fuel-ups and 2,085,725 miles of driving, the 2003 Chevrolet Avalanche 1500 gets a combined Avg MPG of 13.70 with a 0.07 MPG margin of error.

Any Engine Type 5.3L V8 GAS (57) V8 GAS (13) Any Body Style Crew Cab Pickup (20) Cab & Chassis - Crew Cab (2) Any Submodel North Face (2) On Road Edition (3) Base (20) Z71 (32) Other (14)

Below you can see a distribution of the fuel-ups with 285 outliers (4.06%) removed.

Following shows the average MPG of each of the 71 vehicles in the system.

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• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Nov 2024 • 42 Fuel-ups

  Property of naparkertx

• 12.9 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed
  Added Mar 2017 • 204 Fuel-ups

  Property of V3rmiciousKnid

• 14.5 Avg MPG

• Avy

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Apr 2025 • 146 Fuel-ups

  Property of shawnsteiner

• 14.3 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed
  Added Dec 2021 • 83 Fuel-ups

  Property of LayinDoors

• 10.7 Avg MPG

• Bumblebee

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Oct 2017 • 260 Fuel-ups

  Property of frito

• 14.0 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Jan 2023 • 440 Fuel-ups

  Property of texasavy

• 13.6 Avg MPG

• Hatcher

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Jan 2020 • 68 Fuel-ups

  Property of iluvtrble

• 12.8 Avg MPG

• Avalanche 1500

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Dec 2022 • 18 Fuel-ups

  Property of wpconner

• 15.8 Avg MPG

• Chevrolet Avalanche 2003

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Sep 2016 • 331 Fuel-ups

  Property of ktrif

• 13.2 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS
  Added Nov 2019 • 50 Fuel-ups

  Property of ManM

• 15.0 Avg MPG

• 2003 Chevy Avalanche 1500

  2003 Chevrolet Avalanche 1500 On Road Edition 5.3L V8 GAS Automatic 4 Speed
  Added Aug 2016 • 679 Fuel-ups

  Property of handyannie

• 6.1 Avg MPG

• Red

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Aug 2018 • 221 Fuel-ups

  Property of varmenta73

• 15.5 Avg MPG

• The Avalanche

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed
  Added Aug 2021 • 59 Fuel-ups

  Property of ethoover

• 15.5 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 GAS V8
  Added Apr 2013 • 68 Fuel-ups

  Property of trx

• 12.6 Avg MPG

• Henrietta

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Jun 2021 • 49 Fuel-ups

  Property of scoob8000

• 14.6 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 North Face 5.3L V8 GAS Automatic 4 Speed
  Added Jul 2022 • 61 Fuel-ups

  Property of brysonboy2002

• 10.0 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Sep 2017 • 10 Fuel-ups

  Property of troutbum65

• 13.2 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 On Road Edition 5.3L V8 GAS Automatic 4 Speed
  Added Jan 2023 • 4 Fuel-ups

  Property of mkshep40

• 11.7 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Oct 2015 • 142 Fuel-ups

  Property of quacketj

• 13.9 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Sep 2017 • 184 Fuel-ups

  Property of dasny97

• 11.7 Avg MPG

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