The GM 12540329 King Pin KIT is a crucial component for the front steering and suspension system of various General Motors vehicles, including Topkick Kodiak trucks from 1990-2002 and T Series 5500-6500-7500-8500 models, also shows to fit 1993-2002 Medium School Buses. This kit is designed to provide stability and smooth steering performance for these specific vehicle models. With the brand's reputation for quality, this king pin kit ensures durability and reliability in providing necessary support for the vehicle's steering and suspension system. This part is discontinued and no longer available from GM. Please check your kingpin and compare to the measurements I have pictured because these trucks use more than one type axle on them. Shipping is free on this item. Thank you