Compatible with Cadillac CTS 4DR HF 2005 2007 and Cadillac STS 3.6L 2011. OEM: 12674782, 12621649. Key benefits Verifies oil pump status: indicates whether the oil pump is working properly, detects if the pump is stuck, and senses low oil to maintain engine safety. Reliable in harsh conditions: designed to ensure proper monitoring even in the most severe operating environments. Immediate signaling: will promptly notify the vehicle's oil pressure gauge or computer of potential problems, enabling quick response. What it does The oil pressure switch sensor provides realtime indication of oil pressure status, helping prevent engine damage due to low or lost oil pressure. It measures oil pressure accurately and triggers the low oil pressure warning light when needed. Where to find and how it's paired Location: behind the plastic protective cover, behind the intake manifold or on the of the engine. Package includes an oil pressure sensor socket to quickly remove the old sensor and install the one. What's included Oil pressure sensor with OEM compatibility Oil pressure sensor socket for easy removal and replacement 2 3 practical use scenarios Routine maintenance check: use to verify that the oil pump is functioning correctly and oil pressure is within specification. Dashboard warning scenario: when the oil pressure gauge shows abnormal readings or the low oil pressure light activates, the sensor provides reliable confirmation and signaling. Harsh operating conditions: in demanding driving conditions, the sensor continuously monitors oil pressure and alerts you to potential issues before they affect engine health. Compatibility and quality notes OEM numbers: 12674782, 12621649 ensure proper fit for the listed Cadillac models. Function and performance: designed to accurately measure oil pressure and immediately communicate with the vehicle's gauge or computer.