Brake Abs Warning Light problems of the 2000 GMC C1500

Had a recall on the brakes, recall # 05068. Classic cheverolet (now out of business did the work) they only cleaned the parts, abs light came back on a few months later so they just kept cleaning them until my warranty expired. Then when I brought it back it all of a sudden need over $2000 dollars of repairs. My wife got them to kick in a $1000. But I believe the parts should of been re manufactured out of stainless steel so they didn't rust & I wouldn't still be having his problem. Now I'm probably looking at another $2000 to continually fix the same issue. They basically did the same thing with the tail gate recall, just replaced with new parts of the same mat'l as the ones that were rusting and failing in the 1st place. So I replaced them since then again also. Which if they would of made them out of galvanized or stainless they would of held up better.