Got another one. Does anyone know how to or if you can replace heater/ac control dash light? Got a 68 cutlass vert. Slowly but surely getting all interior lights working but this one. Thanks.

 

Should be able to. Unfortunately I have a 72 which uses a different dash and courtesy light panel. But mine has 2 diffusers for the lights - one over the wiper/cruise switches and 1 over the heater. To replace the bulbs you have to go from the backside of the dash. Fortunately I don't have AC venting to deal with either. From what others have said about 68/69 models that may be a PITA, but I believe it's much the same process for what you'll have to do to replace the bulb.