Is these a common problem?

Hi,

I have the stock radio in my 91 PA and have just sound in the rear. The front and door speaker doesnt work.
So I ask if that a common problem, is the speaker not working or radio problem?

Which head unit do you have?

There are 2 main head units that were used.. One has a CDM Box that has the amp section fail at times.. The other if its the cheapie, can fail the right front followed by the left front... On and on...

Just kind of depends..

I have the standard Delco Cassette Tape in my PA. I have a Delco Cassette Tape player from my 98 Lumina but I dont know if they replaceable.

91 Buick Radio:
http://i.ebayimg.com/22/!Bd(64Iw!2k~$(KGrHqMH-C8ErfzEe+2ZBK4p+r!Msg~~_12.JPG

98 Lumina Radio:
http://ep.yimg.com/ca/I/electronman_2076_20622933

So you mean the speakers give up, or the Radio? And if it the Radio can I replace the both radios?

I have something like that too. Sometimes the right front speaker (or the back) make a rumbling sound, sometimes they work, sometimes they don't.
The radio unit I have seems original but looks a bit more modern than Mclin's first pic. What can be done to fix it?