msapanara

I ordered the new shaft to fix the clunking noise. Ordered 19153614 after double checking for correct part number. The new part has a shaft at the bottom end with a bolt hole going thru it. It looks like it slides into the steering box. Looking at my original shaft, I can see a clamp at the bottom of the shaft that clamps around a shaft that comes out of the steering box. Do I have the correct part ??? I even checked with gmpartsdirect and gave them my VIN. They say its correct, but it doesn't look like it will fit. Top section looks good. Bottom section is two male shafts. My Silverado is a 2006, 1500.