radio noise

[PHIL1966]

have a 07 chevy 2500hd classic when i start the truck up on cold mornings I get a motor noise out of the right rear speaker until the truck warms up then it goes away anyone else have this problem and what can I do for it ?

[1GCHK23D]

a friend of mines right rear makes wining noise that gets higher with rpm. his is 2005 ccsb. he changed the speaker and it still does it .

[1GCHK23D]

Talked to my buddy he said his does it on a particular bump he hits everyday. He thinks it may have something to do with his brake controller.

[millwright01]

I've never had a noise on mine.

[5kirks]

Mine does it too not sure whitch speaker or all of them?? but goes away later??

[PHIL1966]

it only make this noise when the outside temp. is below 35