Description
LMMF 96–2005 3100/3400 ECM & Harness Combo – Plug-and-Play GM V6 Swap Wiring Kit
Looking for a complete, no-hassle wiring solution for your GM 3100 or 3400 V6 swap or demolition derby build? The LMMF 96–2005 3100/3400 ECM & Harness Combo delivers everything you need in one package. That means no junkyard wiring, no confusing diagrams, and no chasing parts.
This plug-and-play engine management kit includes a professionally built, simplified wiring harness paired with a tuned ECM. It is designed specifically for GM 3100 and 3400 V6 engines (1996–2005). Whether you’re building a demolition derby car, engine swap project, or budget performance setup, this combo makes getting your engine running simple and reliable.
What’s Included
- Professionally built simplified 3100/3400 engine harness
- Â Matched tuned ECM (Engine Control Module)
- Injector adapter included
- Built with all new wiring, connectors, and quality components — no brittle junkyard harnesses
- Clean, labeled, and ready-to-install setup
Built for Reliability & Simplicity
Unlike recycled factory harnesses, every LMMF harness is constructed using brand-new wire, connectors, and components to ensure maximum durability. Old harnesses often fail due to cracked insulation, corroded terminals, and brittle wiring. These problems can ruin a race or derby build.
Each harness is professionally simplified, removing unnecessary circuits and sensors. As a result, you get a clean, dependable wiring system designed to withstand derby hits, vibration, and hard racing conditions.
ECM tuned and matched to the harness. This gives you a ready-to-run engine management solution right out of the box.
Perfect For
• Demolition derby builds
• 3100 / 3400 engine swaps
• Budget performance builds
• Circle track or grassroots racing setups
• Clean, simplified installs
Why Builders Choose This Kit
• True plug-and-play wiring solution
• No junkyard wiring or brittle harnesses
• Matched ECM eliminates compatibility guesswork
• Simplified setup for faster installs
• Reliable electronics built to handle abuse
Skip the headaches of building your own wiring or hunting for used parts. The LMMF 96–2005 3100/3400 ECM & Harness Combo gives you a complete, simplified engine wiring solution so you can plug it in, fire it up, and send it. 🔥
Pro Tip: Pair this wiring kit with our ECM mounts, shifters, and tie rods to complete your build. Browse the DerbyParts.com shifters and steering components to finish your setup.
