Up for sale is a brake piston actuator for various GM models including Regal, Lumina, and Cutlass. This OEM part, manufactured by ACDelco in France, has an interchange part number of 1791126 and an OE/OEM part number of 3487735. It is a vintage part, but still a direct replacement for your vehicle's left or right brake caliper. This brake piston actuator is perfect for those looking to rebuild their braking system without the need to buy a complete kit. It is a genuine ACDelco product that ensures the same quality and reliability as your original equipment. Buy with confidence and get back on the road safely with this brake piston actuator.