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My friend David in KS, found a gauge cluster with tach in a 87’ big grain truck for me. Appears to be in good condition, just a little dust. Double lucky for me it is the same style that came in 1/2 to 1 ton trucks. It also has 80 psi oil gauge (note: as per forum information, 80 psi gauge takes a different sending unit, GM part no longer serviced, need to use a “Standard” part.). The good news is this style of gauges with tach and gas gauge in lower left, has more parts available. Board member Ray has been helping me learn how to repair, install, and get any needed parts. Photos below are installed in big truck and removed taken by David. No cleaning yet, still has original KS dust. Plan is to clean/refurbish per forum suggestions. Likely need a replacement printed circuit.

Plan to post more information Ray provided.