My radio in my Kia Rio 2005 sedan is only picking up AM stations. i have pulled it out and unplugged and replugged but still the same problem

Don't know what model you have. 03-05 Amanti has fuse AV audio. fuse box diagram below.
https://www.autogenius.info/kia-amanti-2003-2005-fuse-box-diagram/
03-06 Sorento
https://www.autogenius.info/kia-sorento-2003-2006-fuse-box-diagram/
03-05 rio
https://www.autogenius.info/kia-rio-2003-2005-fuse-box-diagram/

Fix your car right away, by clicking the link
KIA CARNIVAL SEDONA SERVICE REPAIR MANUAL 2002 2003 2004 2005 DOWNLOAD

Its recommended to disable the fuel pump to release pressure in the line before removing the filter. Either pull the fuse or pump relay.

below the link to fix the civic seat belt but you can request to fix your seatbelts it's 40 dollar and it will be working again

tip it out and replace the radio ,it would cost more to replace the output transistors than the radio is worth

Pull out your console (very carefully with a flathead screwdriver) it just pops off, and check your wire connections leading to your radio. you may take it out with a screwdirver and a bit of a yank but be careful, its really not that hard, it all just snaps into place, there are a lot of wires back there one may just be loose

Check to make sure the antenna did not unplug from the back of the radio. This can cause you to loose all FM radio signals

first you will have to find out what the light is all about it could be something as simple as a bad airfilter or something more complex like an o2 sensor you can go to auto-zone and they will check the light for free and tell you what the problem is once you do this if you like send me a message and ill tell you how to rectify the problem hope this helps you.

You should be able to pick up a Haynes repair manual at most autoparts stores. Hope this helped.

Go to the radio station that you want, once there, push any of the numbered buttons and hold it there for a couple of seconds. That should set it.