I did a complete front steering overhaul on my Tahoe 2000 4wd which required removing many components. One of the few cases in my life where I thought about it beforehand and it made sense to order this print as well. I decided that since everything should have been removed already, the front axle oil seal would be replaced as it is easier for me to access. The old one didn't leak, but it was OLD and a little preventative maintenance never hurt!