LS3 Wire Harness

LS3 Gen IV Wire Harness | LS3 Wiring | E38 ECM

Welcome to the LS3 wire harness, built by Speed Scene Wiring, Made in the USA. The LS3 engine wiring — or as many call it, the LS3 engine management system — requires solid integration with the GM LAN and all associated computers. The LS3 harness will support active fuel management, giving you full access to every option that GM has engineered.

With every fly-by-wire LS3 harness we build, we supply the pedal harness. If you have the pedal, we will need it to test your application upon completion. If you are buying a new accelerator pedal, always stick to the exact year, make, and model the engine came out of.

All GM engine fuel management computers need reprogramming and remapping. We can handle any programming parameter changes you have made. SSW removes anti-theft and body programs, linking the LAN with the ECM.