My 07 Silverado LT stock radio speakers don't work in the morning but work in the afternoon after the south Alabama sun heats up the interior. Does the stock radio have an internal or external amp? If external where is it located?

 

Internal amp, and this happened to some guys cavalier on here, it wouldnt start but after the sun come up on it and got it heated up it would start right off.

 

thanks pretty much what I thought