My 93 Park Avenue with dual zone ECC.

The light flashes slowly, no matter what the temp, or setting. Its very annoying at night.
I did put a CD player in it, from a 97 monte carlo, i think. Either way, as the techinfo stated, if I put a newer radio in, the display does not dim at night, so I get a bright light at night. Is this related to the flashing light or a different problem? It didn't do this right after i put the radio in, (2 months ago) and i figured some tint would help the bright light on the ECC.

Thanks

I can't gaurantee the validity of the stereo/ECC information for a Buick. You shouldn't either.

Try the Techinfo procedure for extracting your own codes. All ECC'* up through 93 in Bonnevilles can do this. You may or may not be able to.