Welcome To The Corvette Action Center billd!
Glad to have you in our community. Hope you find your time spent here enjoyable and fruitful.
The bulbs are not difficult to replace at all, just expensive.
If you take the plastic bezel off the front of the guage cluster, you'll see four silver discs (Those are the reflectors, or dispersal devices, for the light bulbs; this directs the light to the guages and not in your face.) Gently pry the discs out of the cluster and you'll be able to see the bulbs.
The replacement bulbs you buy will have sockets included, but unless you have the cluster removed, you don't need to replace the sockets. Just find something that enables you to grip the glass bulb without crushing and breaking it, and pull the bulb from the socket.
When you are ready to replace the bulbs, use disposable surgical gloves or something to prevent transfer of the oils from your skin to the bulbs. If you don't, you will drastically reduce the lifespan of the bulb.
Carefully insert the two wire prongs of the bulbs into the sockets, replace the reflector discs and the cluster bezel, and you're finished.
Gordon Killebrew has an excellent book dealing with the digital guage cluster:
"1984-1989 Corvette Digital Cluster Book" - A Complete Step-By-Step Operational And Troubleshooting Guide
For Your Car, Inc.
P.O. Box 239
Cross Plains, TN 37049-0239
1-615-654-2860
Good luck.
_ken
