[96riviera18]

im not really sure about the 95 vs 96-99 riviera difference(they switch a lot of things in 96 i dont rem. if rach size or collum was one of them) but most gm cars have different collums and racks. you can find a used one in a junk yard or buy them online new/referb. i've never dont a swap so i cant tell you how to go about doing that. i have heard of people replacing just the pin at the top or bottom of the collum to eliminate the rattle the steering wheel gets over time but i dont know how or if that would fix your prob.