My suspension hits hard in the rear.

I have to tell you, I'm not up to speed on your suspension. I thought this description might help.

the link is for self diagnostics. I did notice possible trouble codes for your suspension system, c1 codes, manufacturer specific. even with the code, not sure I can walk you through it. good luck

Good luck finding parts for it too! You can try gmpartsgiant, gmpartsdirect, Cadillac Tim, or Ted Halcombe. Hope that helps! Jim

Thank you all for answering back. This car need some things but it is a beautiful car and I will keep repairing it.

You're welcome. Glad to help. I just wanted to prepare you for the difficulty of finding parts. It looks like a very beautiful car in the picture and I hope you can find the parts to fix it! Jim