Silverado ABS pump motor relay

Hi, I have read about a repair being able to be done to the abs pump relay, anyone know where to get the parts. My 2000 silverados ABS light came after driving through a heavy rain. Also I seem to have a lot of the problems I've read on this forum. ABS light, knocking at startup, sometimes a small slip in transmission pulling out from a stop, noise in steering. Ive had 10 GM Trucks since 86 but really debating if I'll ever buy another