I have a 2026 Silverado LT, the non bose as well.
Upgrading the door speakers is pretty straightforward. You could honestly go to walmart, or Auto Zone/ O Reilly and get a set of 6x9s for the front, and 6.5s for the rear. You do also have to get some adapters for each, but they are like $10 a pair on Amazon. Then some plug and play harnesses that are about $10 a pair on Amazon as well.
And I would also suggest a 10 pack of the Amazon Basics sound deadening. Slap that all around the speakers and on the open metal of the inside of the door. And your golden.
I am currently doing this with my Silverado. Although I am having a bit of trouble because I am snooby I guess and bought some Alpine S2 S69c's which are 2 way components and I am having to wire from the door up to the dash....
Having never installed speakers before, its taking me just a bit to get everything correct.
But if you dont buy expensive component speakers, and just some $40-$50 door speakers.
You will DRASTICALLY improve the sound over these stock paper cone junk speakers.
I thought my Silverado had an issue with the radio/ sound for a while.
Come to find out.
The stock speakers are just
THAT SH*TTY
I cannot wait to have some decent sound in the truck
What did you end up doing?