I have a 2003 S-10 pickup and the drivers side door speaker rattles/vibrates - sometimes. It tends to be worse in colder weather but can happen when it's warmer also.Sometimes it is quite noticeable and sometimes fairly quiet.
To me, it sounded like it was just vibrating part of the door panel or something but when I put my ear down there it was definately coming from the speaker. So I took the door apart and tightend the mounting screws, maybe a 1/8 turn max. There was also a small pebble sitting in the speaker so aha! there's the problem or so I thought. No noise for about a week then my wife took the truck and drove it to her father's house, about a 4 hour drive, and said it made noise the whole way.
Any ideas what might be causing this? I thought that if it was blown it would be a pretty constant noise but maybe I'm off base with that assumption. If it needs to be replaced am I better off having someone do it? The speaker is rivited to the door so it's not as easy as just unscrewing and screwing back in.