96-2005 3100/3400 harness ecm bundle package

96–2005 GM 3100 / 3400 V6 Harness Bundle

Looking for a complete, no-hassle wiring solution for your 3100 or 3400 GM V6 swap or derby build? This is the full package.

The LMMF 96–2005 3100/3400 Harness Bundle includes everything you need to get up and running without chasing parts or guessing on wiring.

What’s Included:

✔️ Professionally built & simplified 3100/3400 engine harness
✔️ Built with all new wiring, new connectors, and quality components — no brittle junkyard wiring
✔️ Tuned ECM matched to your setup
✔️ Injector adapter

Why Choose the Bundle?

This isn’t just a harness — it’s a ready-to-run solution built specifically for reliability, simplicity, and durability. Every harness is constructed using brand-new wire and connectors, eliminating the problems that come with old, cracked insulation and worn terminals.

We remove unnecessary circuits, clean up the wiring, and deliver a plug-and-play setup designed to survive derby hits and performance abuse.

Perfect for:

• Demolition derby builds

• Engine swaps

• Budget performance setups

• Clean, simplified installs

No junk wiring. No unnecessary sensors. No guesswork.

Just plug it in, fire it up, and send it. 🔥