Audio Systems: Rear speaker 2003 Cadillac Deville, high pitch sound, bose speakers

Question
My rear speaker, a Delco Electronics, shakes and rattles is a high pitch sound when ever i hit a bump. i belive it is just loose, not blown. my question is how can i tighten it. the speaker is not screwed, only set in place ith metal clamps. i believe the only way to fix it is to remove the rear interior panel. my question is how can i do that. i cant thank you enough for your help and for this websites. you are a good man for allowing me to email you my question. btw my car is a 2003 Cadillac Devile with standard, not bose speakers.

Answer
Once you get at the speaker(s), you could remove the clips and use a flexible sealant around the edges of the speakers b4 reinstalling. 3-4 dabs around the speaker should do.
*Be careful not to over do it!
Let that set up overnight and they should be very securely mounted once again.
Forgot that part (sorry)

♫