front seal
If it's the crank pulley, that can be done by just removing the pulley and hub, and using a seal removing tool. (it's a "hook and pry" kind of tool) If that's your leak, you won't have to remove too much stuff and the time spent is minimal. If it's one of the other seals, A) plan on replacing ALL of them while you have the front cover off the engine; and B) prepare for an interesting experience, as you're going to have to remove a fair amount of parts in order to get to the front cover.....
WAIT A MINUTE!!!
"Badazz" and I appear to be assuming that your car has an LT1 engine, since you're posting in the LT1-LT4 section. Your avatar, however, shows an LS1 car. What year is your car?
For the most part the rest all of the seals have a small area next to them on the timing cover to get a tool in. ( if i remember right) I would get a seal puller from auto parts, to avoid damaging the timing cover sealing surface. You dont want to scratch up the inside lip of the cover when pulling the seals.
Use a correct size socket with hammer to reinstall seals, and your done.
OBTW your going ot need to pull hub off to get the lower seal, so do a search for hub pulling.



