Description
LMMF 98-05 3800 Simplified wiring harness (Standalone)
Our Simplified Standalone Harness for 1998–2005 GM 3800 engines is designed to make your engine swap or race build as simple and reliable as possible. Built using all brand-new wiring and connectors, this harness eliminates unnecessary factory wiring while providing a clean, dependable setup.
The simplified design requires only a basic 2-wire connection to get your engine running, making installation fast and straightforward for race, off-road, and demolition derby applications.
Features
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Designed for 1998–2005 GM 3800 engines
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Simplified standalone wiring system
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Built with brand-new wiring and connectors
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Requires only a 2-wire hookup to run
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Clean layout for easy installation and troubleshooting
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Ideal for engine swaps, race cars, off-road builds, and demolition derby vehicles
Compatibility
These harnesses can also work with older 3800 engines when paired with a 1998–2005 ECM.
Adapters are available to convert to older-style injector harnesses, allowing compatibility with different injector setups.
Important Notes
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Tuned ECM sold separately
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Designed for off-road use only
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Not intended for emissions-controlled or street-driven vehicles
