Before deploying, I noticed clicking from underneath the car. After inspection I narrowed it down to the end joint on the driveshaft. I ordered a replacement from gmparts online for my car (a 2009 auto) and had it shipped to my house part #20990073. After I got back and settled in, I go to replace it and notice they are different parts. Apparently my auto car has a 20990071 in it (for a manual). They have different bolt sizes and conneting ends. I bought the car used, has anyone heard or done this swap before? Looking for the best way to fix the issue.