replacement bulbs and socket for 90-96 cluster here is what I found.

I found through my local auto supply store you can by already assembled 194 bulbs with new sockets in a box of 10. I purchased 20 to re-do all my instrument cluster bulbs for 24.00. If yours is like my 90 it is impossible to remove the bulbs without destroying the sockets, these ones I bought fit the cluster perfectly but use 194 bulbs instead of the factory 161 bulbs.

the wagner code is PC194

Sorry I couldn't help 1-1 directly....seems that C4 vettes are not the ONLY GM/whoever cars to suffer this problem....