Piston Assembly 12589634 for Buick LW9 3.0L Engine

The Buick LW9 3.0L V6 engine (commonly found in 2000–2010 model year Buick GL8 and Regal vehicles) utilizes piston assemblies specifically designed for an 89mm bore; their OE part numbers are typically 12589634 or 12589635. These pistons are generally classified as gasoline-specific components and are primarily used for repair purposes to meet the specific configuration requirements of this 3.0-liter V6 engine.