My 2009 has same issues with speakers. Sometimes they all work, sometimes only front, sometimes back. The 2009 has wiring issues that Chevy just wants to avoid. Classic point is the BCM. This and only this is the reason for service esc, brake lights, and third brake light! Recall did nothing to fix it!
I'd like to make you aware of some things we disapprove of around here.
One is that we don't condone or allow personal attacks, so I removed your offensive personal remark about Greenman.
The second is that you seem to be inflaming the issue with rhetoric, not facts. The front speakers are known to fail on more than their fair share of Gen7 models, so that is a reasonable conclusion to make, especially when you consider that you're trying to attack a post that was made 3 years ago. The BCM is
not the only reason for the speakers to fail. Get your facts straight before you comment.
If you feel that the BCM is
also a reason for the failure then so be it, but to insist that it's the
only reason while demeaning a trusted member who also happens to be a Certified Technician is just not gonna fly here!
"Certified Tech" means this guy works on cars for a living, so I tend to trust his input way more than an unknown like you. You would do well to take a different tack if you're going to continue to post.