2002 Chevy Cavalier Rear Signal Lights, Brake Lights and B

My 2002 Z24 Cavy is having some electrical problems. Currently, the rear parking lights light up, but don't blink for the turn signal, don't brighten (or come on during the day) for my brakes, and my backup lights don't work. The front turn signals do work correctly and I get a fast
blink. I have checked all fuses and replaced all bulbs with no effect. I know my brake switch is working because it does in fact light up my cyclops brake light. I am reading some places suggesting to replace the turn signal assembly for brake and signal light issues, but I haven't
found mention of this being related to backup light problems as well. Anybody have any ideas what my issue could be? Thanks.