Don't know if this was mentioned before, but I had a rattle coming from the Stock Bose Sub on my '03 Touring. I took the cover off and noticed that the four screws holding the sub to the frame were not screwed in all the way which allowed the sub to have some play. The screws were really tight however, but I took a 10mm (i think) socket and cranked on them some more to get the sub nice and snug. They were already too tight for a phil. screwdriver. I have no more rattle now.

For all that are still using the Stock Bose, you might want to check your sub to see if secure...

 

You should have used some Locktite or fingernail polish while in there...the problem will probably come back!!!

 

Locktite Blue...hopefully that will be good enough.