

Yuno post
Humvee LS Swap Harness Arrived!
Published: 22 September 2026Location: Melbourne, Victoria, Australia: 14 likes
One of the big pieces to this puzzle for the Humvee LS swap is this harness that just showed up recently! It's pretty fitting that it came from a veteran-owned business since it's going on a Humvee! Warr Performance reworked this factory GM harness to work specifically with my engine and transmission combo (a combo that was never a factory option - gen 3 5.3 engine with front cam sensor and a 4l80e). It is now a standalone harness powered by the compact weatherproof fuse box, and they flashed the P59 PCM for this combo as well so it's ready to run. Some more backstory with these chaps: I met them last year and they were super helpful and the nicest people to us newbies and let us convoy with them the whole week!
