Getting Your Square Body LS Swap Wiring Harness Right

Finding the right square body ls swap wiring harness is usually the biggest hurdle for anyone trying to drop a modern engine into an old Chevy or GMC truck. We've all seen those projects that look amazing under the hood but never actually hit the road because the owner got intimidated by a giant "spaghetti monster" of wires. Honestly, it doesn't have to be that way. If you're tired of messing with old, brittle factory wiring and just want your 5.3 or 6.0 swap to run like a top, getting the electrical side sorted is your top priority. ...

March 1, 2026 · 6 min · Alexandre Florian