My Cart
Upgrade your vehicle's performance with our premium LS/Vortec swap standalone harnesses, designed for Gen IV (58x) engines with T56, TH350, and 700R4 transmissions. At PSI Conversion, we offer tailored wiring harness solutions that cater to both drive-by-wire (DBW) and drive-by-cable (DBC) throttle body types. Made with high-grade materials such as GM Delphi connectors and TXL high-temperature wire, our harnesses ensure durability, reliability, and seamless integration for your engine swap projects.
Whether you prefer DBW for its modern electronic control or DBC for its mechanical simplicity, our LS swap harnesses provide the perfect fit and functionality for your specific setup.
An LS/Vortec swap standalone harness with T56/TH350/700R4 is a specialized wiring system designed to integrate an LS or Vortec engine with T56, TH350, or 700R4 transmissions into your vehicle. It ensures all electrical components communicate properly and function optimally, maintaining the performance of your engine swap.
When selecting between DBW and DBC, consider your preference for electronic versus mechanical throttle control. DBW offers more precise electronic control and compatibility with modern features, while DBC provides a straightforward mechanical connection, often used with 700r4 transmissions to hook a kick-down cable to.
To choose the right harness, you need to know your engine type, the Gen IV (58x) system, and your throttle body preference (drive by wire or drive by cable). Our products cater to various setups, ensuring a perfect fit for your transmission and specific engine configuration.
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
techsupport@psiconversion.com