how to change light bulb for gear indicator on Pontiac Grand Ville 1972

I've got the same problem with A/c heater control??? no way to get behind dash to het your hand up there!!!

Well I got bulb changed but had to remove lower dash panel under column, then remove dash bezel, remove heater control & found socket & bulb hanging from harness, new bulb & made sure it was "firmly planted" in control !!! & ran a wire from stereo "antenna " wire to run to rear deck antenna for power antenna coming from Amazon soon. Prick of a job doing bulb and think that's " the only way to get at dash bulbs with a A/C car!!