First of all, Bose systems and/or speakers are not 'cheap', as they are considered to be a premium audio system. You don't have to like the Bose sound, and in fact, I am not a fan of the Bose sound, but to be clear, the Bose system is a premium system. One of the main reasons why I am not a fan of the Bose system, is that I believe that they are weak in midrange sounds (where 90+% of audible sounds are produced), so I completely removed my Bose system and replaced with an aftermarket set of components.
It is certainly possible that your Bose speakers are damaged, and need to be replaced, but the only true way to evaluate that is to pull off the door's interior cover and inspect them. It is also possible that the Bose amplifier is damaged, as that will cause a sound like a blown speaker, as well. I recommend that you check the speakers first to confirm their status.
If the Bose speakers are damaged, then you will need to find a replacement with the same impedance, usually in the area of 1 to 2 Ohms (most aftermarket speakers are 4 Ohms). In this case, your best bet may be to find replacement Bose speakers, used or new, on EBay, at an attractive price. You can also call Crutchfield and see what speakers they have with the Bose equivalent impedance that will fit your truck.