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LS/LT Swap Standalone Wiring Harnesses

Premium LS & LT Swap Standalone Wiring Harnesses for Gen 2, 3, 4, and 5 Engines

Upgrade your vehicle’s performance with our premium LS swap standalone wiring harnesses, designed for a variety of engine generations including GEN 2, 3, 4, and 5. At PSI Conversion, we specialize in providing top-quality wiring harnesses that ensure a perfect fit and optimal functionality for your LS swap projects. Our products cater to a wide range of configurations, from LS/Vortec (1997-2007) (24X) Gen 3 to LT1/LT4/L86/L83 (2014+) Gen 5 engines.

Made with high-grade materials such as GM Delphi connectors and TXL high-temperature wire, our harnesses are built for durability and reliability, ensuring a seamless and efficient conversion process for your vehicle.

PSI Conversion Search:

  • Filters

    Transmission Type

    Generation

    Crank

    Throttle Body Type

    Computer Type

Item Results

  • Filters

    Transmission Type

    Generation

    Crank

    Throttle Body Type

    Computer Type

Item Results

Click on the Video to learn how to Identify Your Engine!

                                         or

Click Here to use the LS Vin Decoder to Identify Your Engine

                                        or

If You Aren't Sure of what Engine you have, CLICK HERE, for a Component ID Guide

Use the Information below to help identify your Engine Generation

GEN V

GEN IV

GEN III

GEN II

  • 2014+ Direct Injection
  • High Pressure Fuel Rails below Intake Manifold
  • 4 Bolt 6 Pin DBW Throttle Body
  • LT1, LT4, L83, L84, L86, L87, L8T, L8P
  • 2014-2019 Corvette 6.2
  • 2016-2024 Camaro 6.2
  • 2014-2026 Silverado 5.3 6.2 6.6
  • 2016-2019 CTS-V 6.2
  • GM CRATE 5.3 6.2 6.6 GEN V 
  • 2007-2014 LS3, LSA, L96 etc
  • Gray Crank Sensor
  • Cam Sensor in Timing Cover
  • 4 Bolt 6 Pin DBW Throttle Body
  • Plastic Intake w/ Fuel Rails
  • EV6 Fuel Injectors
  • 2006-2013 Corvette 6.0 6.2 7.0
  • 2010-2015 Camaro 6.2 7.0
  • 2007-2014 Silverado 4.8 5.3 6.0 6.2
  • 2007-2009 Trailblazer & SS 5.3 6.0
  • 2015-2019 2500 Silverado & Van 6.0
  • 2006-2014 CTS-V 6.0 6.2
  • GM Crate 2007 2024 5.3 6.2
  • 1997-2007 LS1, LS2, LQ4 etc
  • Black Crank Sensor
  • Cam Sensor at Rear of Engine (LS2 in Timing Cover)
  • 3 Bolt 8 Pin DBW Throttle Body (LS2 6 Pin)
  • 3 Bolt DBC Throttle Body
  • Plastic Intake w/ Fuel Rails
  • EV1, Multec, or EV6 Fuel Injectors
  • 1997-2005 Corvette 5.7 6.0
  • 1998-2002 Camaro 5.7
  • 1999-2007 Silverado 4.8 5.3 6.0
  • 2001-2006 Suburban 5.3 6.0
  • 2003-2006 Trailblazer & SS 5.3 6.0
  • 2004-2006 GTO 5.7 6.0
  • 2004-2005 CTS-V 5.7
  • 1992-1997 LT1 5.7
  • Oval 2 Blade Throttle Body
  • Aluminum Intake
  • EV1 Fuel Injectors
  • Camaro 1993-1997
  • Corvette 1992, 1993,1994,1995,1996
  • Caprice 1994,1995,1996

PSI harnesses are built for real swaps in real vehicles. If you are putting an LS into a Nova, an A-body, a B-body, a C10, a Buick, or an Oldsmobile, we have a harness built for your exact engine and transmission combination. We build the harness around your setup, not the other way around

Drive-by-Wire LS Swap Harnesses

A drive by wire ls swap harness is designed for Gen III and Gen IV engines running electronic throttle control. The LS standalone harness drive by wire connects your throttle pedal position sensor to the throttle body electronically with no mechanical cable between them. If your engine came with electronic throttle from the factory, this is the harness you need. PSI offers ls swap harness dbw configurations for 4L60E, 4L80E, 6L80E, T56, and manual transmission applications.

[Browse DBW Harnesses]

Drive-by-Cable LS Swap Harnesses

A DBC LS harness is built for engines using a mechanical throttle cable. Gen III Vortec truck engines and early LS1 applications commonly run drive by cable setups. The DBC setup is straightforward and a solid choice for classic car builds where you want to keep things simple. PSI DBC harnesses are available for 4L60E, 4L80E, T56, TH350, and 700R4 transmission applications.

[Browse DBC Harnesses]

LS Swap Harnesses for 700R4 and TH350

The LS to 700R4 swap pairs a modern LS engine with an overdrive transmission that fits in a lot of classic builds without major tunnel work. You get modern LS power with a transmission that physically fits where the original unit lived. PSI carries harnesses specifically configured for the 700R4 and TH350, along with the components you need to complete the conversion. If you are building a 700R4 LS swap kit setup, this is your starting point.

[Browse LS 700R4 Harnesses]

LT1 Swap Harnesses (Gen II, 1992-1997)

The LT1 swap harness covers Gen II applications including the 1992-1997 LT1 and LT4. Whether you are pairing it with a 4L60E or a T56, PSI has the lt1 4l60e and manual transmission configurations in stock. A clean lt1 swap harness from PSI uses the same GM Delphi connectors and TXL wire as every other harness we build.

[Browse LT1 Harnesses]

Gen V L83 Swap Harnesses

The l83 swap harness is built for Gen V LT engines including the L83, L84, L86, and L87. Gen V runs direct injection and a more complex engine management system than previous generations. PSI Gen V harnesses are purpose-built for these applications and available for automatic and manual transmission configurations.

[Browse Gen V Harnesses]

Gen III or IV Holley Swap Harnesses

The PSI Holley terminator X swap harness is built for any Gen III or IV engines including the popular LS1, LS3, and LQ4 . The Terminator X and Terminator X Max harnesses allow you to run Holleys tried and true system, that included wide band O2 tuning and datalogging.  PSI Holley harnesses are purpose-built for the Terminator X and available for automatic and manual transmission configurations.

[Browse Holley Harnesses]

Tech Support

If you are not sure which harness fits your build, call us at 732-276-8589 Ext. 1003 or email TechSupport@psiconversion.com. Our team has been doing LS swaps for a long time and can sort out your combination quickly.

Questions About LS Swap Standalone Wiring Harness

What is an LS swap wiring harness?

An LS swap wiring harness is a specialized wiring system designed to integrate an LS engine into your vehicle, ensuring all electrical components of the drivetrain function correctly and maintain optimal performance during the engine swap.

What is the difference between a 24X and a 58X LS swap wiring harness?

The 24X and 58X refer to the different reluctor wheel tooth counts used by various LS engines. A 24X harness is designed for Gen 3 (1997-2007) LS engines, while a 58X harness is used for Gen 4 (2007-2014+) LS engines. Using the correct harness for your engine type ensures proper sensor compatibility and engine management.

Can an LS swap wiring harness be used for both automatic and manual transmissions?

Yes, many LS swap wiring harnesses are available in configurations for both automatic and manual transmissions. It is important to select the correct harness type based on your transmission choice to ensure all necessary connectors and wiring are included.

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