It is not necessary to remove the dash. Only necessary to remove enough of the trim pieces to get the radio out. If you look carefully you will see what needs to be removed.
Are you asking about the trim panel above the glove box or the trim panel in front of the radio or the trim panel around the instrument cluster? Ask again telling us which panel you wish to remove.
under the right rear window trim.
with a hammer
How to remove the fake wood trim from dashboard
Either 7 or 8, depending on trim level
To remove the windshield trim on a 1968 Chevy Impala you will need a trim removal tool that has slides which can release the locking clips.
All you have to do is remove the trim from the left side steering wheel dash and then simply unbolt/remove the headlight switch.
first remove the dash trim, you can go to any auto parts store and buy a trim removal tool if need be. you can also remove trim by pulling straight out, be carefull not to break it. after removing trim there are 2 screws holding switch in. remove the screws pull out a bit and remove wires.
remove dash trim
to remove the dash trim around the stero unit, find the screws under the ac/heater controls that are on the trim, to remove the rest of the trim you need to remove the plate around the shifter too, so take the screws out of the shifter's plate. remove the rest of the screws around the trims and you should be able to pull the trim out of place.