Moog K6331 Idler Arm Greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear Loose or worn chassis parts can lead to premature tire wear Greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear Fits 1988 - 1991 GM trucks Improves chassis performance and durability Easy to install Designed as stock replacement