This product is a set of OEM General Motors engine computer (ECU) connectors and pigtail wires designed specifically for the 20-22 Silverado 1500 diesel engine. The connectors have a pin terminal type and are made of plastic material. They are designed for easy installation and do not require any programming. Manufactured in the United States, these OE/OEM part numbers 24000210 and 24000211 ensure a perfect fit for your vehicle's ECU.