LS PNP Alternator Extension Harness

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The LS PNP Alternator Extension Harness adds an extra 30 inches of reach to your GM LSx alternator subharness. It’s specifically designed for use with accessory drive systems where the alternator is mounted farther away from the main harness—such as Camaro, Firebird, GTO, or CTS-V configurations. This extension also works perfectly with aftermarket brackets that relocate the alternator to a low-mount position or passenger-side location, making it a great option for many LS swap builds. Built using high-quality, automotive-grade wire, the harness is wrapped for durability and signal integrity, ensuring reliable charging performance in any engine bay layout. Key Features: 30″ alternator extension for GM LSx engines Fully populated with 4-pin wiring (not just charge wire) Compatible with LS1, LS2, LS3, LS6, and other Gen III/IV LS engines Works with factory and aftermarket harnesses Ideal for relocated alternators and custom LS swaps Note: Required when using LS PNP harnesses with low-mount alternator brackets or front-drive setups that place the alternator away from the driver’s side. Show more