Fleece Performance Duramax Fan Extension Harness, 2011-2019 LML/L5P



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Fits: 2011 thru 2019 Chevy Silverado/GMC Sierra 2500HD/3500HD LML/L5P Duramax Diesel

Fleece Performance replacement fan extension harness for the 2011-2019 LML - L5P 6.6L Duramax allows you to repair a broken or damaged harness without needing to replace the entire fan and clutch assembly.  This harness is mounted to the fan assembly and connects to the fan and chassis harness. Produced in-house, our manufacturing process includes fully automated wire cutting and terminal crimping to ensure you get the highest quality replacement parts you need to get your truck back on the road quickly.


  • Repairs broken or damaged harness 
  • No need to replace the entire fan or clutch assembly 
  • Automated wiring cutting ensures high quality parts
  • 6 month Limited Parts Warranty


  • Product Options
    • LML Fan Extension Harness
    • L5P Fan Extension Harness


  • 2011-2016 cooling fan clutch part numbers: 15-40580, 15-40513, 84144840, 25838900, 1540513, 84166745, 23134137
  • 2017-2019 cooling fan clutch part numbers: 15-40577 and 84013368