Can you tell that I've got a fixer-upper?

My 1997 Tahoe very likely has a bad pulse wiper relay.

My local dealer wants 135 for parts and labor, and the piece costs like $25 at the Autozone right now.

Is this easy to tackle? Is tehre anyone that might be able to help me with this one?

This was a known issue to GM, but they have closed this out and are not covering any more repairs for this issue because it was so long ago. :-(