Based on data from 70 vehicles, 6,611 fuel-ups and 2,039,362 miles of driving, the 2003 Chevrolet Avalanche 1500 gets a combined Avg MPG of 13.71 with a 0.07 MPG margin of error.

Any Engine Type 5.3L V8 GAS (56) V8 GAS (13) Any Body Style Crew Cab Pickup (19) Cab & Chassis - Crew Cab (2) Any Submodel North Face (2) On Road Edition (3) Base (19) Z71 (32) Other (14)

Below you can see a distribution of the fuel-ups with 245 outliers (3.57%) removed.

Following shows the average MPG of each of the 70 vehicles in the system.

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• Avalanche

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Jan 2022 • 126 Fuel-ups

  Property of wkforrest

• 14.0 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed
  Added Nov 2023 • 311 Fuel-ups

  Property of mab49

• 11.1 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Oct 2017 • 14 Fuel-ups

  Property of zippy6

• 13.5 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed
  Added Jul 2018 • 31 Fuel-ups

  Property of mexatron81

• 10.6 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Jul 2017 • 82 Fuel-ups

  Property of jake7240

• 14.9 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Nov 2018 • 4 Fuel-ups

  Property of frankyd95

• 11.1 Avg MPG

• The AV

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Jul 2018 • 25 Fuel-ups

  Property of Geezy

• 13.0 Avg MPG

• Bumblebee - original Fuelly

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Jun 2014 • 168 Fuel-ups

  Property of frito

• 14.2 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Apr 2017 • 12 Fuel-ups

  Property of philw1300

• 11.7 Avg MPG

• Avalanche

  2003 Chevrolet Avalanche 1500 5.3L V8 GAS Automatic 4 Speed Cab & Chassis - Crew Cab
  Added Mar 2013 • 54 Fuel-ups

  Property of orinator

• 14.5 Avg MPG

• truck

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Mar 2014 • 47 Fuel-ups

  Property of DCfromSTP

• 13.7 Avg MPG

• Tahoe

  2003 Chevrolet Avalanche 1500 Custom Submodel Automatic 4 Speed
  Added Sep 2016 • 119 Fuel-ups

  Property of jkeeney

• 13.2 Avg MPG

• My Avalanche 1500

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Oct 2016 • 132 Fuel-ups

  Property of dasny97

• 14.7 Avg MPG

• Bren's Truck

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Nov 2016 • 47 Fuel-ups

  Property of glaguarta

• 28.1 Avg MPG

• 2003 Chevy Avalanche

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Oct 2014 • 12 Fuel-ups

  Property of dirtymoe77

• 12.2 Avg MPG

• Z66

  2003 Chevrolet Avalanche 1500 GAS V8
  Added Jul 2013 • 3 Fuel-ups

  Property of OttOiOttO

• 14.4 Avg MPG

• ThaImo

  2003 Chevrolet Avalanche 1500 GAS V8
  Added Apr 2014 • 7 Fuel-ups

  Property of buddhacan

• 14.9 Avg MPG

• Avalanche - 10-50

  2003 Chevrolet Avalanche 1500 Z71 5.3L V8 GAS Automatic 4 Speed
  Added Aug 2016 • 371 Fuel-ups

  Property of gtlamb

• 14.7 Avg MPG

• My Z66 AV

  2003 Chevrolet Avalanche 1500 GAS V8
  Added Jun 2013 • 3 Fuel-ups

  Property of drclyons

• 16.3 Avg MPG

• 2003 Chevy Avalanche SLT

  2003 Chevrolet Avalanche 1500 GAS V8
  Added May 2013 • 6 Fuel-ups

  Property of jtsautos

• 16.7 Avg MPG

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