My Cart
Upgrade your Chevy LS swap with precision-engineered standalone wiring harnesses for LS w/4L60E/4L80E transmissions. Tailored for G-Body, Monte Carlo, and Malibu builds, these harnesses ensure seamless connectivity and optimal performance. Designed for popular LS engines like LS7, LS3, L76, LS2, and L99, each harness supports 58X applications with robust construction and reliable operation.
Perfect for enthusiasts looking to simplify their engine swaps without compromising quality, these harnesses are easy to install and built to last.
About
Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI Harnesses are Made in the USA. In addition to wiring harnesses, PSI carries Holley Products, Vintage Air A/C, Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion needs!
My Account
Contacts
2029 Route 88
Brick, NJ 08724
ph. 732-276-8589 Mon-Fri: 8:00am to 6:00pm ET
customerservice@psiconversion.com
sales@psiconversion.com
Post sale tech support:
techsupport@psiconversion.com