[skyzend]

I've still got my 99 Blazer and have replaced about 4 seat adjusters.
This is a very poorly engineered and manufactured cheap cheap part they do not last.
Actually I am a little pissed at this as it just breaks for no real reason ... everything else wears out over time.
I think that the seat belt can get looped over it without you knowing which may lead to the breakage who knows?

Anyways ... this part can be replaced without seat removal.
I cannot remember the steps exactly but I think all I did was peal back part of the seat cover and there are 3 or 4 bolts that hold it on. The whole replacement takes no more than about 20-30 minutes, pretty straight forward and not difficult to do.

This part at the dealer is not in-expensive. Its a bit pricey for what it is and as far as I can tell it has never been re-engineered for longer life ... good luck.