1995 vet instrument cluster  works   then gets eratic   then no reading  have changed the cluster 3 times with sanme problem the cluster may show speed and fuel amount or it may not  all analog gages work perfect it is just the digital gages in the center that show speed and fuel that does not work

Hi Howard!

Sounds to me like there is a ground issue with the cluster. If you have changed the cluster already, and still have the same problems, it ain't the cluster itself, obviously. I would be looking at the ground circuits for the digital section of the cluster. Don't have a wiring diagram for that year here at home, but I can dig it up Monday once I'm back at the shop...if ya need/want. Once you determine the locations of the grounds, you can check to see if all are in good condition. Also, make sure the cluster connections are clean, and snug fitting. A little bit of corrosion on the terminals can cause intermittent issues like that.

Joel Adams  
My Link

    
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Do you perchance have a wiring diagram you can email me. 
thanks. 
annicorvette@hotmail.com

I do have at the shop. I'll do my best to get it to you tomorrow. 

Joel Adams  
My Link

    
(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Here's an abbreviated diagram of the ground distribution. The G200 ground should be on the driver side, end of the instrument panel, but might be down lower behind the kick panel. I'm still looking for a definitive location. I would most likely just run a redundant ground to the two terminals there at the IP connector. There's a LOT of other things grounded at that same spot....some might be affected by it, some may not. Best to clean it really well once you find it. Take the screw/bolt out, use some sandpaper/emory cloth on both the metal on the birdcage, and the eyelet. 

Joel Adams  
My Link

    
(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Otay....I loaded the two instrument cluster diagrams onto my website...it'll be easier to see them. Here's the quick links to them. Just click on either of them to enlarge. Hope this helps. 

1995 Corvette DIC circuits

1995 Corvette Instrument Cluster circuits

Joel Adams  
My Link

    
(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"