BCM?

[giant h2]

Battery has been good for months now! A few days ago the 2005 H2 (150000 miles) had a weird chime with no dash lights or alerts. Yesterday she started normally but when I shut her off the red battery light dash icon stayed on with the key off and out.

Also when I opened the door the radio stayed on and played delayed power didn't go out. It has never done that before? I had to shut the radio with the on/off vol. button (nav radio) it went off normally but I could hear a hiss noise like radio static? Key was out of ignition.

Later on I drove her and all was good but same happened at shut down. Battery symbol light on and radio played with key out and door open and hiss noise.

This morning the H2 was dead and needed a jump start. Any suggestions welcome?? Please help?

notes since last battery issue I disconnected the onstar with fuse removal and pulled out the nav disc.