Hey new to the group!! Just picked up this 2500 5.7 have a little trouble identifying codes I cannot figure out what b7/b8 is but the 64 and 81 are apparently driver door lock and remote radio switch..? Looking for any help thanks.. check engine light doesn’t come on like it should before start up also 4x4 light doesn’t work !!
C codes 64,41/81,00/
B codes b7,01/b8,01