OE number: 22948113 Compatibility - Chevrolet Camaro (2016 model year and newer) - Cadillac CTS (2003–2019) - Cadillac ATS (2013–2019) Main function - Keeps the engine at an optimal temperature by maintaining coolant pressure and flow - Helps absorb and manage pressure fluctuations to protect the cooling system - Reduces engine load and supports efficient performance during normal and demanding driving High performance - Balances tank pressure effectively for stable cooling system operation - Provides a clear coolant level indication for easy monitoring and maintenance - Ensures proper water level to support reliable function under varied driving conditions Why you need it - Replaces a worn or leaking expansion tank to restore proper cooling system operation - Maintains consistent coolant pressure and rise/fall behavior, reducing overheating risk - Simple, OE-spec replacement designed to fit the listed models and maintain original performance Use scenarios - During routine cooling system service on Camaro, CTS, or ATS to restore correct cooling balance - After radiator, thermostat, or water pump replacement to reestablish cooling system integrity - In hot climates or under heavy load where the cooling system experiences higher pressure and temperature demands