After reading your 2nd post,I would,it couldn't hurt.It's alot cheaper then doing the master first.
I might be reading to much between the lines here,but,you wrote that your mechanic said the brake light came on when he was driving?Has it come on when you were driving it?If not,IMO it sounds kind of fishy to me.It might just need the rears adjusted up,this is also free,if done yourself.At this point,I would do the free/easy things first,before doing the master.
67 RS RAGTOP # matching,
4X4 CHEVY TRUCK
[This message has been edited by 67drake (edited 04-21-2000).]