I've got a 1937 1/2 Ton Chevy truck with the original style shocks and have a question, the shop manual says to top them off with "GM Shock Fluid", of course there is no reference to what viscosity oil etc. that is. What should I use for "GM Shock Fluid?

Thank you

RonG
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Last edited by Dusty53; 09/14/2025 4:02 PM. Reason: Changed Title to make it address the question clearly
1937 Chevy 1/2 Ton Truck