Hey GM vehicle owners and mechanics - this radiator fan sensor switch harness connector is exactly what you need when your cooling system acts up! It's designed to fit electric cooling fan switches with part numbers 3040674, 14043275, and 14043276, making it compatible with various GM models. The connector part number is 12102621, and it's specifically made for 1980-1 models per package. When your radiator fan isn't working properly, often it's the connector that's the problem rather than the fan itself - corrosion, broken wires, or worn contacts can all cause issues. This replacement harness connector saves you from having to replace entire components when just the connection point is faulty. Installation is pretty straightforward if you're comfortable with basic automotive electrical work - just disconnect the old harness and connect this new one. It's one of those small parts that can prevent bigger problems down the road, like engine overheating due to cooling fan failure. Whether you're a DIY mechanic or professional technician, having reliable replacement connectors on hand makes repairs so much easier. For the price, it's cheap insurance against cooling system failures that could lead to expensive engine damage. Seriously, if you're dealing with cooling fan issues on your GM vehicle, this connector might be the simple solution you need!