Door Speakers will only work when cabin temperature gets above 80 degrees F?

What is your question?

My left front door speaker doesn’t work until the cabin temperature gets to about 80. Im not sure that its a loose wire as it doesnt cut in and out when hitting bumps or shutting the door, only temperature affects it. All the other speakers and my head unit are still working fine. Anyone have a fix to this?

What makes this problem better or worse?

Better when cabin temp is around 80F.

How long has your 2012 Chevrolet Malibu had this problem?

A month and a half