Recently my rear and front passenger power windows stopped working. The driver side switch and the switch on each door don't work. But both my rear and front driver side power windows work. What could be the problem, is it just a simple switch or fuse or motor or what??

Good chance its the window regulators, ive had to replace both my rear ones.

Does it make a grinding crunching noise or just not move? if its grinding crunching shell out a hundred bucks a piece and install some new regulators.

No it doesn't make a grinding noise and it doesn't move. A guy I work with gave me a hole power window motor for free so would that fix it? Where is the regulator at, is it directly next to the window motor?

Problems with regulators are common only with ‘00+ Bonnevilles.
I once had a similar problem on the ’92. I took switches out, tested continuity, did not find anything wrong, put them back in, and windows started working fine – must have just been a bad connection.
Not sure if this helps you or not.