Replaced Yukon hub assembly in 1999 and these are a must if you live in the rust belt. The old ones have to be heated and removed with a size 14 impact socket, as they rust badly in the screw head and get stuck in the base plate. Much luck! The bolts are Grade A, which surprises Dorman a bit, as their quality and reliability have dropped significantly. Motor vehicle master from 1988 to today.