The undercarriage. the rocker arms the brake lines are and have been rusted out. its a rusted out frame. this needs to be handled and recalled to all gm owners . this is a costly time consuming matter for individuals to handle. gm should step up to the plate and handle these issues. karma hope u dont need bailing out again i bet this issue alone and gm not helping by doing right thing will cause tremendous hurt to u im sure youve list akot of busuness from this.