The 6L90 Transmission Wiring Harness Assembly 20829970 is a genuine OEM part designed specifically for the Chevrolet Express 3500 with a 6.6L engine size. Made of durable plastic material, this transmission wiring harness assembly features male connectors and a high heat-resistant design. With a direct replacement fitment type and a manufacturer warranty of 60 days, this part ensures a precise and reliable connection for your vehicle's transmission system. Ideal for the years 2010 and 2011, this GM brand wiring harness assembly is a practical and long-lasting component for your vehicle's drivetrain.