The 2001 Chevy 6.6L Duramax Diesel LB7 Engine Wiring Harness is a specific wire harness designed for Chevrolet vehicles. Made in the United States, this wiring harness is not universal and is designed to fit specifically on the upper part of the vehicle. Although it does not come with a manufacturer warranty, this high-quality part ensures proper electrical connections for your Chevy diesel engine.