Just grabbed a new 2020 tahoe. Going to be putting in a big audio system. Will be keeping stock hu adding a lc8i adding a few amps after that, subs as well and replacing stock speakers. I have not pulled the doors off yet and can't find any real definite info on what sizes the speakers are. I have 6 speaker non bose system. I. Sure the front dash are what 3 or 3.5? Front doors and rear doors? Any one know those stock non bose sizes? Seems like maybe 6x9 in front doors but I can't tell. Has anyone put a big system in any of these newer trucks? I am going to be roughly around 12k watts after this install.