00+ 3100/3400 Simplified Harness

Our simplified standalone harness for 00-05 GM 3100 / 3400 engines is designed for easy setup with new wires and connectors. With just a simple 3-wire connection, installation has never been easier.

These harnesses are compatible with older engine models when paired with a 98-05 ECM. We also have adapters to convert to older style injector harnesses. Please note that these harnesses are intended for off-road use only.

If you have any specific requirements or questions, feel free to let us know!

*tuned ecm sold separately