CP3 Regulator Extension Harness

Features:

• Extends CP3 regulator harness connection
• Designed for 6.6L Duramax engines
• Compatible with Bosch CP3 regulators
• Factory-style connectors for easy install
• Built with high-quality automotive wiring
• Automated wire cutting for precision fit
• Crimped terminals for maximum reliability
• Plug-and-play design with no splicing
• Durable construction resists heat and abrasion
• Made in-house by Fleece Performance

CP3 Regulator Extension Harness for GM 6.6L Duramax

If you’re upgrading to a CP3 on your 2011–2016 Duramax and need a little extra reach to make everything connect smoothly, the Fleece FPE-HAR-CP3-EXT CP3 Regulator Extension Harness is exactly what you need. Designed to extend the factory harness when installing a Bosch CP3 pump, this extension takes the guesswork out of custom wiring and helps get your truck back on the road faster—without cutting or splicing into anything. Built in-house by Fleece with quality and reliability in mind, each harness is produced using fully automated wire cutting and terminal crimping. This ensures consistent precision and a factory-style fit that you can trust. Whether you’re swapping pumps during a performance upgrade or replacing a tired stock setup, this harness lets everything plug in just like it should.

Fits: 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML