If you have the alternator with a clutch on the end,Then I would say that is you're problem.I know 2005 and newer have them,not sure if 04's did.I have replaced them for that reason.did an 05 about 4 days ago for a noise.reman alt does not come with a new clutch on it.straight pulley, and parts/clutch are not servicable.Take a long screwdriver and rest it on the alt,put you ear on the handle of screwdriver, see if you here a noise.noise will travel through it pretty clearly.