Which wires and where to tap in to for high/low pass converter to add amp? i see several forums on bose systems but could not find one with without bose. anyhelp / guidance would be much appreciated. it seems GM changes arrangements of wiring and speakers every 2 years. my new truck seems to not get as high of volume either as my 2020 Silverado LT. i watched a Youtube on the lower floor passenger side tapping into the yellow and yellow and black wires but this was also for bose set up, which i do not have.
