It just all seem to hit me at once.
1. led on radio is out
2. cd changer will not come out and will not play when in
3. seems to me that the treble is not working, sounds very bassy.
any suggestions here.

take the old HU out using the removal tools very carefully set it on the ground then get back in ur truck...get a running start and run over the old HU =)

then shop around for a HU in your price range

seriously though it sounds like maybe the stock HU is on its last legs so it is probably time to either opt for an after market HU or find a factory replacement

i didnt get what u meant by the CD changer though? like the 6 disc changer isnt working either? or the HU wont accept cds?

good ideas:) the 6-cd changer seems to get stuck and the player won't except them. Sounds like a problem with the changer. Seems like a lot of problems all of a sudden, is there no chance something else funky is going on?

My 10 disk changer wont work sometimes, but ive never had problems gettin cds in and out