i know how to do the speakers in the dash, and i know that i need to remove the door panels of my 4door jimmy, but i can't figure out how to get the door panels off.
To remove the front door speakers you must remove the screw from the door handle release, and then two under the armrest handle. There are 9 nylon rivets that hold the door in place. Be careful and stick a screwdriver between the door panel and the door itself to pry part of it open. It's easiest to pop off the side closest to the back of the door. Pull the panel away from the door, working from the back, then down, then up the front. After that, you lift the panel off of the door. There's a C-channel holding the door against the window.
Looks like you would need to drill out the rivets that hold the speakers in, but the speaker is held onto a housing with 4 Torx screws. Don't drill them out-just use the appropriate wrench to get it off. You can then cut the speaker wires and pull the speaker out.
When putting in aftermarket speakers, the holes aren't likely to match up with what was originally there. If you can hold the speaker template against the housing so it's seated well, you can use a Sharpie to draw the profile onto the housing and then drill holes for the new speakers. Make sure you use the right bit. You can always make a bigger hole, but you can't make a smaller one.
Dash Speakers: just pop out the speaker grills and the speakers can be disconnected, and un bolted from the grills.
Good luck and here is a wire harness code just in case you need it.
1996 GMC Jimmy Car Audio Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4″ x 6″
Car Audio Front Speakers Location: Dash
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6 1/2″
Car Audio Rear Speakers Location: Rear Doors
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue