Thread: feedback on my stock stereo???

Its in pdf form, however anytime I try to upload a pdf it fails for some odd reason even though it is well under the size limit.

the TSB I found affects the ones with onstar installed, and the solution as it appears is to install a noise filter in the onstar power wire.
A simple test I would personaly try would be to tempoarily remove the onstar fuse and see if the problem goes away, If you dont have onstar I would say it is something to do with the factory amp.