While i was replacing my shot window regulator last summer i realized that on the inside of the rear door, it looks like there is a wiring harness for a speaker, and on the back of the door panel, it looks like there is a space for another speaker. I know bonnevilles come in six speaker editions, so does anyone know if the wiring harness back there is actually for a speaker?

Yes mine has rear speakers, 5 14".

only 00+ SSEi'* had speakers in the rear doors

Some Bonnevilles have eight speakers. These include the SSEi and GXP trim levels. You won't have the wiring, but as PontiacDad states, there is space there.

well, then does anyone have a clue what the wire harness back there is for? im stumped if it isnt for a speaker

This may be for the speaker, but it won't extend beyond the door panel wiring itself. You would need to add everything from the door panel connector on.

oh well okay, I have to open up the other door panel to replace the drivers rear window regulator because that went out this fall maybe ill see what i can do

This may be some use, but it will be limited. In cars with the six speaker system (non-Bose and non-Monsoon), the wiring to the speakers is run straight from the head unit. In the Bose or Monsoon systems, the speaker wiring is routed from the amplifier (located in the trunk) directly to the speakers. Therefore, the other end of this won't terminate in your dash. Since you don't have the SSEi (based on your model year), your body harness will be different as well and you won't have the wiring into the trunk either.

well, you probably just saved me about four hours of frustration, thanks

Got any clue about whether or not i could install an interior trunk pop button? i think ive got a servo motor in the trunk, but no wires running to the glove box (its kinda rediculous that there is a hole in the glovebox where the button should be.)

I suspect the previous owner may have had problems with this. The trunk release wasn't an option, it was standard in all 2K+ Bonnevilles, regardless of trim level. I suspect if you take the glove box out, you may find the connector sitting there somewhere. You likely just need a replacment switch.