2004–2006 GM 3500 LX9 Simplified Wiring Harness

Plug It. Send It. Win It.

Looking for a simple, reliable way to run your 2004–2006 GM 3500 LX9 engine in your derby car, race car, mud truck, buggy, project vehicle, or engine swap? Our LMMF Simplified Wiring Harness removes all the unnecessary factory wiring and leaves only what you need to get your engine running quickly and reliably.

Designed around the GM 3500 LX9 V6, this harness is built using new wire and professionally assembled for easy installation. The LX9 is a popular upgrade over the 3400 due to its improved cylinder heads, larger displacement, and increased power output.

Features

✅ Built for 2004–2006 GM 3500 LX9 engines
✅ Professionally built simplified wiring harness
✅ New wire throughout harness construction
✅ Labeled connections for easy installation
✅ Standalone operation—no factory body wiring required
✅ Automatic transmission functions removed (can be added for additional fee)
✅ Designed for off-road, racing, derby, and swap applications

Basic Hookups Required

Only a few connections are needed to get your engine running:

Constant Battery Power
Ground

Common Applications

Demolition Derby Cars
Dirt Track Cars
Mini Vans
Engine Swaps
Off-Road Builds
Buggies
Custom Projects

Optional Add-Ons

Party Mode Switch
Switch Box
Cooling Fan Controls
Custom Tuning
Transmission Control Options

Important Notes

Intended for off-road and racing use only.
Harness is built to order.
Build times may vary depending on order volume.

Why Choose LMMF?

At LMMF Simplified Wiring, we specialize in building wiring solutions for derby, racing, and engine swap applications. Every harness is assembled with reliability and simplicity in mind so you can spend less time wiring and more time competing.

2005–2006 Buick Terraza/Chevrolet Uplander/Pontiac Montana SV6/Saturn Relay
2004–2006 Chevrolet Malibu/Chevrolet Malibu Maxx
2005–2006 Pontiac G6 Sedan / Coupe
2006–2007 Buick Rendezvous
2006 Pontiac G6 GT Convertible

Country/region

Collection: 3500 LX9

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05 3500 tuned ecm

05 3500 tuned ecm

2004-2006 3500 LX9 Simplfiied Harness

2004-2006 3500 LX9 Simplfiied Harness