Mplsjdub

My front passenger door Bose speaker sounds like crap so I was going to change out all speakers. I called crutchfield because I was reading different info about the factory Bose speakers ohm rating and crutchfield claim that the dash and rear speakers are 3.2 ohm and the front doors are 4 ohm. This is in a 2015 GMC Sierra 1500 Denali crew cab. Now im really confused. Why can’t gm/Bose put the specs on speaker like most do?