Home > LS-24x Harnesses
If you have any questions, or would like to place a harness package order, please call (765) 378-4908.

LS-24x covers all of the Gen-3 engines including the LS1, the 4.8, 5.3, 6.0 Vortec truck engines, as well as the early Gen-4 24x engines, including the 05-06 LS2 GTO, 05 LS2 Corvette, and the 05-06 Trail Blazer engines (5.3, LS2 2006 TBSS).

These Gen-3 engines were available in several configurations with both automatic and manual transmissions, as well as cable throttle and electronic throttle control, commonly referred to as drive by wire (DBW).

We offer control systems to support ALL combinations.

All harnesses include a fuse block to protect the engine/transmission circuits, a PCM controlled fuel pump relay, control wires for the cooling fan relay, and an OBD-2 diagnostic port/check engine light combo for future diagnostic troubleshooting should there ever be a problem.

All ready have a factory LS-24x harness for your project? No problem! We offer factory wiring harness reworks to get your project up and running easy. Just go here for more info.

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LS2 Harness
Our Price: $950.00
Please Call To Order (765) 378-4908

PCM shown for reference only.  Not included with harness.
LS1 Harness - DBW Throttle
Our Price: $800.00
Please Call To Order (765) 378-4908

PCM shown for reference only.  Not included with harness.
LS1 Harness - Cable Throttle
Our Price: $750.00

Includes Vortec 4.8, 5.3, 6.0 PCM shown for reference only. Not included with harness.

If you're sending in your PCM for reprogramming, use the "Special Notes" field above to let us know any engine modifications (headers, cam, etc.) and gear ratio and tire size.
Cable-X Speedometer Adapter
Our Price: $330.00

We carry the Cable-X Speedometer Adapter that allows you to retain your classic cable driven speedometer when using modern day electric VSS signal.  This takes the VSS signal and converts it to a cable driven output to your gauge cluster/speedo, allowing your old cable driven speedo to work with an electronic VSS signal that modern transmissions use.
GM LS-Series Engines: The Complete Swap Manual By Joseph Potak
List Price: $27.99
Our Price: $24.99
Sale Price: $24.99
Savings: $3.00

Here's the most helpful LSX swap book we've ever seen, and now available here on our site!

Stuffed full of info on identifying the different LS engines, helpful swap tips, PCM info, manifolds, oil pans, block differences, fuel systems, front accessory variations, transmissions, sensors, harnesses, cooling system plumbing tips, motor mounts, etc. It's all here!

Written by Joseph Potak, this book will guide you through every phase of your swap project using the number one most desired swap engine in the world!
Firewall Harness Grommet
Our Price: $10.00

We get a lot of requests of customers wanting to buy the grommet we include with every new harness order, so we decided to make them available for purchase separately. Ideal for routing your harness through the firewall, etc. Sold individually. Free USPS shipping within the USA.

Drill a 2 1/8 inch hole for the grommet. Inside diameter where you pass wiring through is .6 inch and flexible (stretchy).
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