"What's the easiest way to wire an LS swap?" is a question we hear a lot, and here's your answer! We're using the original 5.3 wiring harness, PCM, and fuse box, and while all those wires look intimidating, it's actually really simple. It only takes 3 wires (technically 4) to make this truck start and run. Firing it up for the first time is always a little nerve-wracking, but this square body started right up and sounded great right from the start. For more helpful LS Swap videos, click here! https://youtube.com/playlist?list=PL3Xf8yWArPC5Zw2UPwTvSvFt8CjEBSFiO Follow us on Facebook! fb.com/uglytruck Check us out on Instagram! @uglytruckexperience Want to send us something? (NEW address!) 7915 E. Division St. Strafford, MO 65757 Chapters: 00:00 Intro 00:38 Parts Used - OEM Fuse Box & Harness 01:32 Getting Started 04:17 Power to Interior Fuse Panel 10:15 Power to Fuel Pump 14:30 Hot in Run & Start Circuit 16:16 Starting Circuit 19:27 Power Distribution 21:22 PCM Programming & First Start Prep 23:26 FIRST START #utx #squarebody #lsswap #c10 #lsc10 C9WWQA06XDYOQNOZ